Re: RES: Problems with gzip compression with Apache/Tomcat cluster and Firefox
You need mod_gzip or mod_deflate(?) if your using apache in front of tomcat (via jk) -Tim Acácio Furtado Costa wrote: Hi We're having problems to configure gzip using TC559/Apache Cluster... We moved the compression=on and others gzip declarations from connector 80 to 8009 in all Tomcat Servers but it seems that Apache isn't serving gzipped html... Do we also need to make any gzip configurations (mod_gzip?) in the Apache Server itself? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RES: Problems with gzip compression with Apache/Tomcat cluster and Firefox
Hi We're having problems to configure gzip using TC559/Apache Cluster... We moved the compression=on and others gzip declarations from connector 80 to 8009 in all Tomcat Servers but it seems that Apache isn't serving gzipped html... Do we also need to make any gzip configurations (mod_gzip?) in the Apache Server itself? Thanks in advance! Acacio Furtado Costa Pesquisa e Tecnologia GIA - Magnesita S/A ((0xx31) 3368-1349 * [EMAIL PROTECTED] -Mensagem original- De: B.J. Guillot [mailto:[EMAIL PROTECTED] Enviada em: sexta-feira, 20 de maio de 2005 13:15 Para: tomcat-user@jakarta.apache.org Assunto: Problems with gzip compression with Apache/Tomcat cluster and Firefox We have recently been experimenting with enabling gzip/deflate compression via our Apache/Tomcat cluster, but have encountered some problems with the way the compression works with the Firebox browser. When Firefox brings up a compressed page for the first time, it looks fine. If they reload a static html page, bizarre things start to happen. In some cases, garbage just gets displayed on screen (looks like the actual gzip encoded stream), and other times Firefox displays a dialog box asking if you want to download the html files. When IE is used, it works fine. Some background: Running two-node Tomcat 5.5.4 cluster using JK2 2.0.4 protocol to communicate back to Apache2 2.0.52 for load balancing. Browsers tried were Firefox 1.0.3 and Internet Explorer 6.0. If I use Tomcat's gzip compression alone with Firefox, it works fine. It's only when we through in Apache and JK2 into the mix with the cluster that Firefox displays charged. It seems to be an issue related to the way that compressed pages get cached. I'm not sure if the problem lies with Tomcat, Apache, JK2, or Firefox itself. Can anyone provide some pointers? Thanks. Regards, B.J. Guillot - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Fault Tolerance in Tomcat Cluster
This is information is wrong, tomcat =5.0.19 and 5.5 have a cluster implementation with fail over mechanism when use mod_jk or other loadbalancer modules. Peter samuel cheung schrieb: Hi, From this article http://www.onjava.com/pub/a/onjava/2004/03/31/clustering.html?page=2, it said Tomcat 5 does not provide a built-in fail over mechanism to detect when a cluster member crashes. Can someone tell me if Tomcat 5.5 provides fail over detection in tomcat cluster? Thank you. Sam - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Fault Tolerance in Tomcat Cluster
Hi, From this article http://www.onjava.com/pub/a/onjava/2004/03/31/clustering.html?page=2, it said Tomcat 5 does not provide a built-in fail over mechanism to detect when a cluster member crashes. Can someone tell me if Tomcat 5.5 provides fail over detection in tomcat cluster? Thank you. Sam - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[OT] RE: DNS Request distribution and TCP NAT distribution For Tomcat Cluster
[Marked off-topic as this now has nothing to do with Tomcat.] From: Steve Kirk [mailto:[EMAIL PROTECTED] Can I ask how sure you felt of what you say here please: Uhhh... how about 'the little pixies told me, and I believe everything they say'? :-) It's from a combination of knowing two folks who used to run an ISP's DNS services to get details of the timeouts, plus a little bit of digging into the format of SOA and A records. In other words: it's my opinion, do not take it as canon! I'll try to explain my reasoning below. I tried to research it but could not get to the bottom of it with any real info from ISPs (the problem is that they seem to do their own thing to various extents). That is *exactly* the problem. In essence, one cannot rely on some aspects of the DNS specification in the real world, as real-world ISPs hack with their software to improve performance for their environment in ways that break the spec. An example: I've taken cache expiry times on a zone down to 5 minutes, several days before I knew I needed to move a service to a new IP address; changed the DNS; and sure enough, some ISPs were still handing out the old address 20 hours later because they weren't respecting the stated expiry times and were substituting their own, and the old service was still getting hits. I have set up roundrobin DNS for an ecommerce site in the past without any complaints from users, and the balance of load between a pair of clustered servers seemed pretty even. Good to know that it can work in the real world. I can make all the theoretical points I want, but the hard data in your statement is probably worth more than the rest of this email. I would expect any DNS server run by an ISP (such as AOL) to receive the zone records from SOA intact, i.e. these major dns servers should know about all rr Ips for a given dns name, and would therefore be able to RR distribute them to lower-tier DNS servers. Your expectation is incorrect, I think - even the large DNS servers make standard requests for A records for the given FQDN, and cache the result. If the result contains a set of IP addresses in a particular order, then that's what is obtained. To my knowledge (my reasoning falls down if this is not the case, so this is the bit to check!) neither the returned A records themselves nor the returned SOA record contain any indication that they should be handed out in a round-robin fashion; and the SOA record would not typically be requested by another server. I would have thought that the level at which DNS servers do not pick up the fact that there is a RR DNS entry is where they do not do a zone transfer from a primary DNS server - they simply act as a client and cache what they get as a response, so they are unaware that there even are more than one IP. Even high-level DNS servers don't do zone transfers unless they're secondaries for the zone. And, even then, the information about whether or not to use round-robin is an option set for the zone, not something that appears in the SOA record for immediate use by the secondary. Also, remember that many zones are configured to refuse zone transfer requests from addresses that are not configured as secondaries. So overall I guess I'm saying I'd be surprised if AOL's DNS servers only cached one entry of a RR set for a DNS name. What are your thoughts? I've revised my position slightly. I think they'll cache the list in a particular order, rather than a single entry; but the ordering of that list will be fixed as they won't know to serve it in round-robin fashion. If you can confirm or challenge that position, I'd be interested! - Peter - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] RE: DNS Request distribution and TCP NAT distribution For Tomcat Cluster
Thanks Peter, interesting. Your experience of it sounds similar to other experiences I've had when changing from one ISP to another (there seems to be a cutover time of up to 3 days where some 3rd party ISPs clearly still cached and served the old IP for our domain name). It was because of this that I investigated more at the time, but as you say, it's each ISP to their own practice. I would expect any DNS server run by an ISP (such as AOL) to receive the zone records from SOA intact, i.e. these major dns servers should know about all rr Ips for a given dns name, and would therefore be able to RR distribute them to lower-tier DNS servers. Your expectation is incorrect, I think - even the large DNS servers make standard requests for A records for the given FQDN, and cache the result. Yes you're probably right there now I think about it. I think these are referred to as caching servers as opposed to secondary. It's the secondaries that receive the zone transfers. Having said that, I'd have thought that a large ISP such as AOL would have secondaries, (inaccesible by joe public), but would also have caching servers, which are the ones they make public. Since they typically have several caching DNS servers, in theory there is a good chance that each of them will get a different one of the RR Ips from their secondary server, so in theory the RR goal is often achieved? For example I just used DOS nslookup to query my ISPs 2 main dns servers for www.microsoft.com - they each returned a different address, although repeatedly querying each one returns the same answer every time. If I go through a local caching DNS on my LAN, that returns a third address for MS - again, the same one every time. If the result contains a set of IP addresses in a particular order, then that's what is obtained. To my knowledge (my reasoning falls down if this is not the case, so this is the bit to check!) neither the returned A records themselves nor the returned SOA record contain any indication that they should be handed out in a round-robin fashion; and the SOA record would not typically be requested by another server. AFAIK that is correct, the DNS protocol does not say anything about how DNS servers should respond to clients when there are multiple Ips registered in DNS for a host. Likewise if the DNS server only returns one IP all the time, the client protocol provides no way for the client to say give me the next one or give me number 3 or give me them all. So some caching DNS servers will always return the first one in the list, others will order Ips according to their own rule (which meets the spec) but then always serve the first one in that order. And others will cycle through them in turn (which is RR). Basically, it's internal feature of the DNS server to decide how it treats hostnames for which is has more than one IP. Of these 3 basic approaches, the first gives no RR, the second is slightly better, the 3rd is the best. Of course they are all only rudimentary load balancing methods, and of course even the 3rd falls down if ISPs with millions of users happen to cache a single IP for a site, as you say. Someone please correct me if any of this is wrong, as I'd like to understand this area better :) PS this has rekindled my interest so I just googled to refresh my mind on the basics, this seems a useful page that explains what we are talking about above. http://www.onjava.com/pub/a/onjava/2001/09/26/load.html - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] RE: DNS Request distribution and TCP NAT distribution For Tomcat Cluster
From: Steve Kirk [mailto:[EMAIL PROTECTED] Thanks Peter, interesting. Internet issues in the large tend to be - you get emergent behaviour that is often unexpected :-). I think these are referred to as caching servers as opposed to secondary. It's the secondaries that receive the zone transfers. Yes. Note that these roles are per-zone; a given DNS server may act as a primary or secondary for some zones, and as a caching server for others. Having said that, I'd have thought that a large ISP such as AOL would have secondaries, (inaccesible by joe public), but would also have caching servers, which are the ones they make public. It would be difficult to persuade those secondaries to be effective - for what zones are they secondaries? Let's say AOL want to act as a secondary for foo.com. How do AOL contact the owners of foo.com in order to request that their secondary server is added to the list of allowed IPs for zone transfers? Other than that, AOL could then make use of those servers as forwarders from their caching servers, I accept. Since they typically have several caching DNS servers, in theory there is a good chance that each of them will get a different one of the RR Ips from their secondary server, so in theory the RR goal is often achieved? Assuming they are independent and not configured to use the same forwarders, yes. You might be surprised how few DNS servers an organisation needs, though - Demon (my home ISP, and not a small one) has two, and could probably get away with one except for redundancy. I've not seen an ISP setup document yet that says to use primary and secondary DNS of ns47.isp.net and ns32.isp.net - they're almost all ns0 and ns1 or ns1 and ns2, indicating that there are probably very few in the organisation. For example I just used DOS nslookup to query my ISPs 2 main dns servers for www.microsoft.com - they each returned a different address, although repeatedly querying each one returns the same answer every time. If I go through a local caching DNS on my LAN, that returns a third address for MS - again, the same one every time. Yup. So anyone using your ISP's DNS servers will get one of two IPs for www.microsoft.com at present, out of the however many they have. Lumpy load balancing in action :-). You likely haven't set up your own caching DNS to forward requests to your ISP's DNS servers; otherwise you'd have had one of the same answers. Basically, it's internal feature of the DNS server to decide how it treats hostnames for which is has more than one IP. Indeed. PS this has rekindled my interest so I just googled to refresh my mind on the basics, this seems a useful page that explains what we are talking about above. http://www.onjava.com/pub/a/onjava/2001/09/26/load.html Yes, that seems like a reaonable summary, although it doesn't really go into the caching effects we're discussing here. - Peter - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] RE: DNS Request distribution and TCP NAT distribution For Tomcat Cluster
Yup. So anyone using your ISP's DNS servers will get one of two IPs for www.microsoft.com at present, out of the however many they have. Lumpy load balancing in action :-). Yes true, hadn't thought of it like that. Where a site has more Ips for a host than an ISP has DNS servers, this is going to lead to lumpiness. I guess this is one of the key reasons why RR DNS is only ever a poor man's load balancer. OK-ish if you have 2 Ips, gets worse if you have more. You likely haven't set up your own caching DNS to forward requests to your ISP's DNS servers; otherwise you'd have had one of the same answers. Funnily enough I have, and I use Demon too. I think my local DNS has maybe kept an MS entry cached and it's refresh TTL is out of sync with the demon DNS caches. But what you say is right - if I restart that local DNS, it will then get a fresh MS entry from one of the 2 cached at the Demon servers. In fact I just have, and it did. Thanks again, that's clarified a few things I was a bit fuzzy on. Sorry John for the slight off-topic diversion but I hope this diversion on RR DNS might have been of interest to you too. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
DNS Request distribution and TCP NAT distribution For Tomcat Cluster
I was looking at the book, 'Tomcat: the definitive guide' last night, and the clustering chapter talked about load balancing via DNS Request distribution or TCP NAT distribution. Could someone explain these to me a little better in relation to Tomcat in a microsoft architecture? most of that book is based on Unix. My questions are as follows - mostly they are just clarification of the mechanism: 1) for DNS Request Distribution - I dont understand. The browser sends a URL to the DNS, the DNS responds back with an IP address. But what if at that IP address, you have a web server listening on port 80? If Tomcat is at that address also, Tomcat would have to listen on another port. Can the DNS distribute back to the browser the IP Address AND the Tomcat port so the browser connects to Tomcat on a non port 80 port? Also, is there a way to setup the DNS to Round Robin or check server load on the servers in the Tomcat cluster so it knows which Tomcat server ip:port to send back. OR does this whole thing imply that you have an IP for each web server (IIS), and each web server is tied to each server in the Tomcat cluster via a jk2 redirector? 2)TCP NAT distribution - Does this mean that when the browser connects to the IP address, that that connection is intercepted and the request is distributed to a server in the Tomcat cluster? If this is the case, then what does the interception? and how do you configure that thing to use a specific algorithm (server load, Round Robin, etc..) to choose which server to forward the request to? can it forward to an IP:PORT or does it have to forward to an IP John McClain Senior Software Engineer TCS Healthcare [EMAIL PROTECTED] (530)886-1700x235 Skepticism is the first step toward truth - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: DNS Request distribution and TCP NAT distribution For Tomcat Cluster
From: John MccLain [mailto:[EMAIL PROTECTED] 1) for DNS Request Distribution - I dont understand. The browser sends a URL to the DNS, the DNS responds back with an IP address. But what if at that IP address, you have a web server listening on port 80? The browser talks to that Web server. If Tomcat is at that address also, Tomcat would have to listen on another port. Can the DNS distribute back to the browser the IP Address AND the Tomcat port so the browser connects to Tomcat on a non port 80 port? Only if your original URL uses the name:port notation - there is nothing in this scheme to prevent that. Also, is there a way to setup the DNS to Round Robin or check server load on the servers in the Tomcat cluster so it knows which Tomcat server ip:port to send back. No standard way afaik. Worse, downstream DNS servers may (often do) cache the returned IPs for up to a day despite any cache expiry you put on them. If (say) the AOL DNS servers all get the same IP address in their cache, all your AOL visitors will visit the same IP address. DNS is a very lumpy way of doing load balancing. OR does this whole thing imply that you have an IP for each web server (IIS) IP address yes; IIS depends on whether you want IIS or Tomcat at the business end of the cluster. and each web server is tied to each server in the Tomcat cluster via a jk2 redirector? If you wish to use that architecture, yes. 2)TCP NAT distribution - Does this mean that when the browser connects to the IP address, that that connection is intercepted and the request is distributed to a server in the Tomcat cluster? Yes. If this is the case, then what does the interception? Generically, a router that has this capability. It's that router that also does the NATing. Many mid- to high-end hardware routers and some software routing packages can do this. and how do you configure that thing to use a specific algorithm (server load, Round Robin, etc..) to choose which server to forward the request to? That is router-specific. There is no standard (afaik) for the servers to return load information, so you're stuck with proprietary solutions *or* the router doesn't load-balance. can it forward to an IP:PORT or does it have to forward to an IP That is router-specific. Given that the capability typically exists on mid- to high-end routers, most will also have the capability to change the internal port that is in use. - Peter - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: DNS Request distribution and TCP NAT distribution For Tomcat Cluster
Peter, I agree that DNS is a very lumpy way of doing load balancing. But your comments interested me. Can I ask how sure you felt of what you say here please: No standard way afaik. Worse, downstream DNS servers may (often do) cache the returned IPs for up to a day despite any cache expiry you put on them. If (say) the AOL DNS servers all get the same IP address in their cache, all your AOL visitors will visit the same IP address. I'm not for a minute suggesting that it is wrong :) and wouldn't dream of doing so, because I don't know all the facts myself. I tried to research it but could not get to the bottom of it with any real info from ISPs (the problem is that they seem to do their own thing to various extents). I'm just interested in comparing experiences/opinions. I have set up roundrobin DNS for an ecommerce site in the past without any complaints from users, and the balance of load between a pair of clustered servers seemed pretty even. I would expect any DNS server run by an ISP (such as AOL) to receive the zone records from SOA intact, i.e. these major dns servers should know about all rr Ips for a given dns name, and would therefore be able to RR distribute them to lower-tier DNS servers. I would have thought that the level at which DNS servers do not pick up the fact that there is a RR DNS entry is where they do not do a zone transfer from a primary DNS server - they simply act as a client and cache what they get as a response, so they are unaware that there even are more than one IP. I'm speculating that these minor DNS servers belong to small ISPs, or private companies running their own DNS in-house? So overall I guess I'm saying I'd be surprised if AOL's DNS servers only cached one entry of a RR set for a DNS name. What are your thoughts? -Original Message- From: Peter Crowther [mailto:[EMAIL PROTECTED] Sent: Wednesday 25 May 2005 17:15 To: Tomcat Users List; [EMAIL PROTECTED] Subject: RE: DNS Request distribution and TCP NAT distribution For Tomcat Cluster From: John MccLain [mailto:[EMAIL PROTECTED] 1) for DNS Request Distribution - I dont understand. The browser sends a URL to the DNS, the DNS responds back with an IP address. But what if at that IP address, you have a web server listening on port 80? The browser talks to that Web server. If Tomcat is at that address also, Tomcat would have to listen on another port. Can the DNS distribute back to the browser the IP Address AND the Tomcat port so the browser connects to Tomcat on a non port 80 port? Only if your original URL uses the name:port notation - there is nothing in this scheme to prevent that. Also, is there a way to setup the DNS to Round Robin or check server load on the servers in the Tomcat cluster so it knows which Tomcat server ip:port to send back. No standard way afaik. Worse, downstream DNS servers may (often do) cache the returned IPs for up to a day despite any cache expiry you put on them. If (say) the AOL DNS servers all get the same IP address in their cache, all your AOL visitors will visit the same IP address. DNS is a very lumpy way of doing load balancing. OR does this whole thing imply that you have an IP for each web server (IIS) IP address yes; IIS depends on whether you want IIS or Tomcat at the business end of the cluster. and each web server is tied to each server in the Tomcat cluster via a jk2 redirector? If you wish to use that architecture, yes. 2)TCP NAT distribution - Does this mean that when the browser connects to the IP address, that that connection is intercepted and the request is distributed to a server in the Tomcat cluster? Yes. If this is the case, then what does the interception? Generically, a router that has this capability. It's that router that also does the NATing. Many mid- to high-end hardware routers and some software routing packages can do this. and how do you configure that thing to use a specific algorithm (server load, Round Robin, etc..) to choose which server to forward the request to? That is router-specific. There is no standard (afaik) for the servers to return load information, so you're stuck with proprietary solutions *or* the router doesn't load-balance. can it forward to an IP:PORT or does it have to forward to an IP That is router-specific. Given that the capability typically exists on mid- to high-end routers, most will also have the capability to change the internal port that is in use. - Peter - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Problems with gzip compression with Apache/Tomcat cluster and Firefox
We have recently been experimenting with enabling gzip/deflate compression via our Apache/Tomcat cluster, but have encountered some problems with the way the compression works with the Firebox browser. When Firefox brings up a compressed page for the first time, it looks fine. If they reload a static html page, bizarre things start to happen. In some cases, garbage just gets displayed on screen (looks like the actual gzip encoded stream), and other times Firefox displays a dialog box asking if you want to download the html files. When IE is used, it works fine. Some background: Running two-node Tomcat 5.5.4 cluster using JK2 2.0.4 protocol to communicate back to Apache2 2.0.52 for load balancing. Browsers tried were Firefox 1.0.3 and Internet Explorer 6.0. If I use Tomcat's gzip compression alone with Firefox, it works fine. It's only when we through in Apache and JK2 into the mix with the cluster that Firefox displays charged. It seems to be an issue related to the way that compressed pages get cached. I'm not sure if the problem lies with Tomcat, Apache, JK2, or Firefox itself. Can anyone provide some pointers? Thanks. Regards, B.J. Guillot
RE: Tomcat Cluster + File Sharing
Am I posting this question to the wrong groups or a little too impatient? Any feedback is greatly appreciated. -Original Message- From: Michael Marrotte [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 12, 2005 10:01 AM To: tomcat-dev@jakarta.apache.org Subject: Tomcat Cluster + File Sharing My post to the user list didn't get any response. I'm thinking the developers might provide a little more feedback. I'm just looking for a sanity check. I'd like to cluster multiple Tomcat instances to share the same file system (a NetApp). I'm thinking something like a master/slaves type architecture where the master deploys wars compiles JSP, etc and the slaves just read and execute. I'm picturing the architecture implemented by the use of two server.xml files (e.g. masterServer.xml and slaveServer.xml). However, before I dig too deep into it, I would just like to get any feedback on the idea. Any info is greatly appreciated; at the least maybe point me to some docs that discuss the idea. Thanks, --Mike M. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Cluster + File Sharing
On Tue, Apr 12, 2005 at 04:41:54PM -0400, Michael Marrotte wrote: : Am I posting this question to the wrong groups or a little too impatient? 1/ cross-posting to both tomcat-dev@ and tomcat-user@ is considered a breach of etiquette 2/ perhaps people don't know the answer, or have no thoughts on your situation 3/ perhaps people think your idea is interesting, but want you to take the hit for the RD 4/ If you're worried about JSP compilation, just JSP precompilation 5/ Based on my own experience, I prefer to make app servers as independent as possible. Give each one its own WAR file, such that when the netapp has problems your app stays afloat. -QM : -Original Message- : From: Michael Marrotte [mailto:[EMAIL PROTECTED] : Sent: Tuesday, April 12, 2005 10:01 AM : To: tomcat-dev@jakarta.apache.org : Subject: Tomcat Cluster + File Sharing : : My post to the user list didn't get any response. I'm thinking the : developers might provide a little more feedback. I'm just looking for a : sanity check. I'd like to cluster multiple Tomcat instances to share the : same file system (a NetApp). I'm thinking something like a master/slaves : type architecture where the master deploys wars compiles JSP, etc and the : slaves just read and execute. I'm picturing the architecture implemented by : the use of two server.xml files (e.g. masterServer.xml and slaveServer.xml). : However, before I dig too deep into it, I would just like to get any : feedback on the idea. Any info is greatly appreciated; at the least maybe : point me to some docs that discuss the idea. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Cluster + File Sharing
Hey, 5/ Based on my own experience, I prefer to make app servers as independent as possible. Give each one its own WAR file, such that when the netapp has problems your app stays afloat. This also my experience and I can't believe that JSP classs file sharing work well. It exists today no coordination between the different tomcat instances jsp compilation units. Peter QM schrieb: On Tue, Apr 12, 2005 at 04:41:54PM -0400, Michael Marrotte wrote: : Am I posting this question to the wrong groups or a little too impatient? 1/ cross-posting to both tomcat-dev@ and tomcat-user@ is considered a breach of etiquette 2/ perhaps people don't know the answer, or have no thoughts on your situation 3/ perhaps people think your idea is interesting, but want you to take the hit for the RD 4/ If you're worried about JSP compilation, just JSP precompilation 5/ Based on my own experience, I prefer to make app servers as independent as possible. Give each one its own WAR file, such that when the netapp has problems your app stays afloat. -QM : -Original Message- : From: Michael Marrotte [mailto:[EMAIL PROTECTED] : Sent: Tuesday, April 12, 2005 10:01 AM : To: tomcat-dev@jakarta.apache.org : Subject: Tomcat Cluster + File Sharing : : My post to the user list didn't get any response. I'm thinking the : developers might provide a little more feedback. I'm just looking for a : sanity check. I'd like to cluster multiple Tomcat instances to share the : same file system (a NetApp). I'm thinking something like a master/slaves : type architecture where the master deploys wars compiles JSP, etc and the : slaves just read and execute. I'm picturing the architecture implemented by : the use of two server.xml files (e.g. masterServer.xml and slaveServer.xml). : However, before I dig too deep into it, I would just like to get any : feedback on the idea. Any info is greatly appreciated; at the least maybe : point me to some docs that discuss the idea. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat Cluster Sharing File System (NetApp)
In the midst of architecting a new system and considering clustering Tomcat servers to share the same files from a NetApp mount point. Specifically, configuring multiple instances (server.xml) of Tomcat to share the same /usr/local/tomcat, webapps, etc. Does Catalina support this type (e.g. master/slaves file share) of architecture? Has anyone implemented this that can comment on any issues? I was wondering how things like autodeploy and JSP compile would be coordinated between multiple instances. I'm thinking that each instance has it's own server.xml that controls that, but would like to get a sanity check. Any help is greatly appreciated. Thanks, --Mike M.
RE: Tomcat Cluster
Apparently this was too verbose for anyone to read. I simply just don't understand why each tomcat instance is failing to recognize any other instance in the cluster. Multicast messages are being broadcasted. Is there any configuration parameter I can turn on that will verify that each tomcat instance can see the other instances??? Thanks, Randall -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 23, 2005 9:44 AM To: Tomcat Users List Subject: Tomcat Cluster I have attempted to configure a tomcat cluster using version 5.5.7 of tomcat. I have configured a simple tcp cluster in the server.xml. I have two tomcat instances installed on two different Linux servers (Fedora core 3, IPTAPLES is turned off, there is not firewall). I have apache and mod_jk set up on a third server. Multicast is enabled!!! When I start up each tomcat instance I receive the following message in the catalina.out file. -- Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastServiceImpl setupSocket INFO: Setting multihome multicast interface to:/10.111.22.163 Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastService start INFO: Sleeping for 2000 secs to establish cluster membership Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.deploy.FarmWarDeployer start INFO: Cluster FarmWarDeployer started. Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/testapp Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.session.DeltaManager start INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. - The important thing to note here is that in the last line, I see INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. At first I was thinking that multicast was not working properly. However, I was researching the Tomcat mailing list and found another thread discussing the same issue. I tried to use the tool, tomcat-replication.jar located on the CVS for tomcat. I can see the multicast sessions being generated between both servers using this tool. I also started up ethereal, the packet sniffer. I noticed that both servers are generating multicast packets. However after careful analysis of the packet information, I noticed that my servers were looking for 127.0.0.1/4001 for the receiver port. So I set the tcpListenAddress from auto to 10.111.22.163 This seemed to fix the problem with the multicast packets sending out the incorrect listener addresses. However, I am still getting the same error... INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. So here are my questions: 1. Is this really an error, or is session replication working and I am not testing it properly? 2.What is the proper way to test that session replication is working properly? Can anyone provide me with code that works. I am currently using a bean that I declare with jsp:usebean scope=session.Is this wrong, should I use request.getAttribute(), request.setAttribute()instead. 3.Can session replication replicate things like a class that I implement as java.io.serializable? Thanks in advance, Randall Cluster configuration from server.xml: Cluster className=org.apache.catalina.cluster.tcp.SimpleTcpCluster managerClassName=org.apache.catalina.cluster.session.DeltaManager expireSessionsOnShutdown=false useDirtyFlag=true notifyListenersOnReplication=true Membership className=org.apache.catalina.cluster.mcast.McastService mcastAddr=224.0.0.5 mcastPort=45564 mcastFrequency=500 mcastDropTime=3000 mcastBindAddress=10.111.22.163/ Receiver className=org.apache.catalina.cluster.tcp.ReplicationListener tcpListenAddress=10.111.22.163 tcpListenPort=4001 tcpSelectorTimeout=100 tcpThreadCount=6/ Sender className=org.apache.catalina.cluster.tcp.ReplicationTransmitter replicationMode=pooled ackTimeout=15000/ Valve className=org.apache.catalina.cluster.tcp.ReplicationValve filter=.*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt; / Deployer className=org.apache.catalina.cluster.deploy.FarmWarDeployer tempDir=/tmp/war-temp/ deployDir=/tmp/war-deploy/ watchDir=/tmp/war-listen/ watchEnabled=false/ /Cluster - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED
RE: Tomcat Cluster
Randall, Below is the clustering section of my server.xml running under SuSE Linux (SLES9). Things to check I can think of: 1. Is your server multi-homed (more than one network adapter)? If so you must (at least from my experience) specify both mcastBindAddr and tcpListendAddress as shown below. In my case I'm using a dedicated adapter to connect the cluster over the private address space 192.168.11.x. Obviously the values are different for the Tomcat instance on each server. 2. If after reviewing this it still does not work you can test that multicasting is really working by using the utilities included in the JGroups jars. See: http://www.jgroups.org/javagroupsnew/docs/newuser/node15.html#ItDoesnt Work HTH - Richard SNIP Cluster className=org.apache.catalina.cluster.tcp.SimpleTcpCluster managerClassName=org.apache.catalina.cluster.session.DeltaMa nager expireSessionsOnShutdown=false useDirtyFlag=true notifyListenersOnReplication=true Membership className=org.apache.catalina.cluster.mcast.McastService mcastAddr=228.0.0.4 mcastPort=45564 mcastBindAddr=192.168.11.3 mcastFrequency=500 mcastDropTime=3000/ Receiver className=org.apache.catalina.cluster.tcp.ReplicationListener tcpListenAddress=192.168.11.3 tcpListenPort=4001 tcpSelectorTimeout=100 tcpThreadCount=6/ Sender className=org.apache.catalina.cluster.tcp.ReplicationTransmit ter replicationMode=pooled ackTimeout=15000/ Valve className=org.apache.catalina.cluster.tcp.ReplicationValve filter=.*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\ .css;.*\.txt;/ Deployer className=org.apache.catalina.cluster.deploy.FarmWarDeployer tempDir=/tmp/war-temp/ deployDir=/home/tomcat1/jakarta-tomcat-5.5.7/webapps watchDir=/home/tomcat1/jakarta-tomcat-5.5.7-deployer/bu ild/webapp watchEnabled=false/ /Cluster SNIP -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 01, 2005 8:47 AM To: Tomcat Users List Subject: RE: Tomcat Cluster Apparently this was too verbose for anyone to read. I simply just don't understand why each tomcat instance is failing to recognize any other instance in the cluster. Multicast messages are being broadcasted. Is there any configuration parameter I can turn on that will verify that each tomcat instance can see the other instances??? Thanks, Randall -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 23, 2005 9:44 AM To: Tomcat Users List Subject: Tomcat Cluster I have attempted to configure a tomcat cluster using version 5.5.7 of tomcat. I have configured a simple tcp cluster in the server.xml. I have two tomcat instances installed on two different Linux servers (Fedora core 3, IPTAPLES is turned off, there is not firewall). I have apache and mod_jk set up on a third server. Multicast is enabled!!! When I start up each tomcat instance I receive the following message in the catalina.out file. -- Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastServiceImpl setupSocket INFO: Setting multihome multicast interface to:/10.111.22.163 Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastService start INFO: Sleeping for 2000 secs to establish cluster membership Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.deploy.FarmWarDeployer start INFO: Cluster FarmWarDeployer started. Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/testapp Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.session.DeltaManager start INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. - The important thing to note here is that in the last line, I see INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. At first I was thinking that multicast was not working properly. However, I was researching the Tomcat mailing list and found another thread discussing the same issue. I tried to use the tool, tomcat-replication.jar located on the CVS for tomcat. I can see the multicast sessions being generated between both servers using this tool. I also started up ethereal, the packet sniffer. I noticed that both servers are generating multicast packets. However after careful analysis of the packet information, I noticed that my servers were looking for 127.0.0.1/4001 for the receiver port. So I set the tcpListenAddress from auto to 10.111.22.163 This seemed to fix the problem with the multicast packets sending out the incorrect listener addresses. However, I am still getting the same error
RE: Tomcat Cluster
I used the tools that I downloaded from javagroups as described and I can send messages back and forth over multicast on 224.0.0.4 on port 45564 just fine. I am using the private address space of 10.111.22.x. My servers both contain one network card and each server defined as device eth0. Networking is working fine on each machine as I can ping to anywhere in the world. The only thing I can deduce is that I have a configuration issue that I need to figure out. Just a quick check list 1. Uncomment cluster elements in server.xml 2. Uncomment the replication valve in server.xml.I am assuming this is the valve that is listed in the cluster element in the server.xml. 3. Set all of you session attributes to implement java.io.seriazable 4. Tomcat instances are not on the same machine, so the tcpListenPort can be the same? 5. My web xml is set to distributable for my testapp web application. Possible problems that I have come up with include: Explicitly defining mcastBindAddress=10.111.22.167 when it is not necessary. Explicitly defining tcpListenAddress=10.111.22.167 when it is not necessary. I did not uncomment the correct valve?? Any thoughts/opinions on the matter would be appreciated. Randall -Original Message- From: Richard Mixon (qwest) [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 01, 2005 9:16 AM To: Tomcat Users List Subject: RE: Tomcat Cluster Randall, Below is the clustering section of my server.xml running under SuSE Linux (SLES9). Things to check I can think of: 1. Is your server multi-homed (more than one network adapter)? If so you must (at least from my experience) specify both mcastBindAddr and tcpListendAddress as shown below. In my case I'm using a dedicated adapter to connect the cluster over the private address space 192.168.11.x. Obviously the values are different for the Tomcat instance on each server. 2. If after reviewing this it still does not work you can test that multicasting is really working by using the utilities included in the JGroups jars. See: http://www.jgroups.org/javagroupsnew/docs/newuser/node15.html#ItDoesnt Work HTH - Richard SNIP Cluster className=org.apache.catalina.cluster.tcp.SimpleTcpCluster managerClassName=org.apache.catalina.cluster.session.DeltaMa nager expireSessionsOnShutdown=false useDirtyFlag=true notifyListenersOnReplication=true Membership className=org.apache.catalina.cluster.mcast.McastService mcastAddr=228.0.0.4 mcastPort=45564 mcastBindAddr=192.168.11.3 mcastFrequency=500 mcastDropTime=3000/ Receiver className=org.apache.catalina.cluster.tcp.ReplicationListener tcpListenAddress=192.168.11.3 tcpListenPort=4001 tcpSelectorTimeout=100 tcpThreadCount=6/ Sender className=org.apache.catalina.cluster.tcp.ReplicationTransmit ter replicationMode=pooled ackTimeout=15000/ Valve className=org.apache.catalina.cluster.tcp.ReplicationValve filter=.*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\ .css;.*\.txt;/ Deployer className=org.apache.catalina.cluster.deploy.FarmWarDeployer tempDir=/tmp/war-temp/ deployDir=/home/tomcat1/jakarta-tomcat-5.5.7/webapps watchDir=/home/tomcat1/jakarta-tomcat-5.5.7-deployer/bu ild/webapp watchEnabled=false/ /Cluster SNIP -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 01, 2005 8:47 AM To: Tomcat Users List Subject: RE: Tomcat Cluster Apparently this was too verbose for anyone to read. I simply just don't understand why each tomcat instance is failing to recognize any other instance in the cluster. Multicast messages are being broadcasted. Is there any configuration parameter I can turn on that will verify that each tomcat instance can see the other instances??? Thanks, Randall -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 23, 2005 9:44 AM To: Tomcat Users List Subject: Tomcat Cluster I have attempted to configure a tomcat cluster using version 5.5.7 of tomcat. I have configured a simple tcp cluster in the server.xml. I have two tomcat instances installed on two different Linux servers (Fedora core 3, IPTAPLES is turned off, there is not firewall). I have apache and mod_jk set up on a third server. Multicast is enabled!!! When I start up each tomcat instance I receive the following message in the catalina.out file. -- Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastServiceImpl setupSocket INFO: Setting multihome multicast interface to:/10.111.22.163 Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastService start INFO
RE: Tomcat Cluster
Ok, I figured this out. Just so everyone knows in tomcat 5.5.7, the cluster multicast functionality is a little flaky (no offense to the developers who spent long hours figuring this stuff out). IF YOU DO NOT HAVE A MULTIHOMED NETWORK, YOU DO NOT NEED TO SPECIFY THE PARAMETER mcastBindAddress=10.111.22.167. I have found that this only confuses the instances joining the cluster and as a result, multicast does not work properly. So long story short, do not specify mcastBindAddress=10.111.22.167 if you do not absolutely have to Randall -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 01, 2005 12:12 PM To: Tomcat Users List Subject: RE: Tomcat Cluster I used the tools that I downloaded from javagroups as described and I can send messages back and forth over multicast on 224.0.0.4 on port 45564 just fine. I am using the private address space of 10.111.22.x. My servers both contain one network card and each server defined as device eth0. Networking is working fine on each machine as I can ping to anywhere in the world. The only thing I can deduce is that I have a configuration issue that I need to figure out. Just a quick check list 1. Uncomment cluster elements in server.xml 2. Uncomment the replication valve in server.xml.I am assuming this is the valve that is listed in the cluster element in the server.xml. 3. Set all of you session attributes to implement java.io.seriazable 4. Tomcat instances are not on the same machine, so the tcpListenPort can be the same? 5. My web xml is set to distributable for my testapp web application. Possible problems that I have come up with include: Explicitly defining mcastBindAddress=10.111.22.167 when it is not necessary. Explicitly defining tcpListenAddress=10.111.22.167 when it is not necessary. I did not uncomment the correct valve?? Any thoughts/opinions on the matter would be appreciated. Randall -Original Message- From: Richard Mixon (qwest) [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 01, 2005 9:16 AM To: Tomcat Users List Subject: RE: Tomcat Cluster Randall, Below is the clustering section of my server.xml running under SuSE Linux (SLES9). Things to check I can think of: 1. Is your server multi-homed (more than one network adapter)? If so you must (at least from my experience) specify both mcastBindAddr and tcpListendAddress as shown below. In my case I'm using a dedicated adapter to connect the cluster over the private address space 192.168.11.x. Obviously the values are different for the Tomcat instance on each server. 2. If after reviewing this it still does not work you can test that multicasting is really working by using the utilities included in the JGroups jars. See: http://www.jgroups.org/javagroupsnew/docs/newuser/node15.html#ItDoesnt Work HTH - Richard SNIP Cluster className=org.apache.catalina.cluster.tcp.SimpleTcpCluster managerClassName=org.apache.catalina.cluster.session.DeltaMa nager expireSessionsOnShutdown=false useDirtyFlag=true notifyListenersOnReplication=true Membership className=org.apache.catalina.cluster.mcast.McastService mcastAddr=228.0.0.4 mcastPort=45564 mcastBindAddr=192.168.11.3 mcastFrequency=500 mcastDropTime=3000/ Receiver className=org.apache.catalina.cluster.tcp.ReplicationListener tcpListenAddress=192.168.11.3 tcpListenPort=4001 tcpSelectorTimeout=100 tcpThreadCount=6/ Sender className=org.apache.catalina.cluster.tcp.ReplicationTransmit ter replicationMode=pooled ackTimeout=15000/ Valve className=org.apache.catalina.cluster.tcp.ReplicationValve filter=.*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\ .css;.*\.txt;/ Deployer className=org.apache.catalina.cluster.deploy.FarmWarDeployer tempDir=/tmp/war-temp/ deployDir=/home/tomcat1/jakarta-tomcat-5.5.7/webapps watchDir=/home/tomcat1/jakarta-tomcat-5.5.7-deployer/bu ild/webapp watchEnabled=false/ /Cluster SNIP -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 01, 2005 8:47 AM To: Tomcat Users List Subject: RE: Tomcat Cluster Apparently this was too verbose for anyone to read. I simply just don't understand why each tomcat instance is failing to recognize any other instance in the cluster. Multicast messages are being broadcasted. Is there any configuration parameter I can turn on that will verify that each tomcat instance can see the other instances??? Thanks, Randall -Original Message- From: Randall Svancara [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 23, 2005 9:44 AM To: Tomcat Users List Subject: Tomcat Cluster I have attempted to configure a tomcat cluster using version 5.5.7 of tomcat. I
Tomcat Cluster
I have attempted to configure a tomcat cluster using version 5.5.7 of tomcat. I have configured a simple tcp cluster in the server.xml. I have two tomcat instances installed on two different Linux servers (Fedora core 3, IPTAPLES is turned off, there is not firewall). I have apache and mod_jk set up on a third server. Multicast is enabled!!! When I start up each tomcat instance I receive the following message in the catalina.out file. -- Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastServiceImpl setupSocket INFO: Setting multihome multicast interface to:/10.111.22.163 Feb 23, 2005 9:21:49 AM org.apache.catalina.cluster.mcast.McastService start INFO: Sleeping for 2000 secs to establish cluster membership Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.deploy.FarmWarDeployer start INFO: Cluster FarmWarDeployer started. Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/testapp Feb 23, 2005 9:21:51 AM org.apache.catalina.cluster.session.DeltaManager start INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. - The important thing to note here is that in the last line, I see INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. At first I was thinking that multicast was not working properly. However, I was researching the Tomcat mailing list and found another thread discussing the same issue. I tried to use the tool, tomcat-replication.jar located on the CVS for tomcat. I can see the multicast sessions being generated between both servers using this tool. I also started up ethereal, the packet sniffer. I noticed that both servers are generating multicast packets. However after careful analysis of the packet information, I noticed that my servers were looking for 127.0.0.1/4001 for the receiver port. So I set the tcpListenAddress from auto to 10.111.22.163 This seemed to fix the problem with the multicast packets sending out the incorrect listener addresses. However, I am still getting the same error... INFO: Manager[/testapp], skipping state transfer. No members active in cluster group. So here are my questions: 1. Is this really an error, or is session replication working and I am not testing it properly? 2.What is the proper way to test that session replication is working properly? Can anyone provide me with code that works. I am currently using a bean that I declare with jsp:usebean scope=session.Is this wrong, should I use request.getAttribute(), request.setAttribute()instead. 3.Can session replication replicate things like a class that I implement as java.io.serializable? Thanks in advance, Randall Cluster configuration from server.xml: Cluster className=org.apache.catalina.cluster.tcp.SimpleTcpCluster managerClassName=org.apache.catalina.cluster.session.DeltaManager expireSessionsOnShutdown=false useDirtyFlag=true notifyListenersOnReplication=true Membership className=org.apache.catalina.cluster.mcast.McastService mcastAddr=224.0.0.5 mcastPort=45564 mcastFrequency=500 mcastDropTime=3000 mcastBindAddress=10.111.22.163/ Receiver className=org.apache.catalina.cluster.tcp.ReplicationListener tcpListenAddress=10.111.22.163 tcpListenPort=4001 tcpSelectorTimeout=100 tcpThreadCount=6/ Sender className=org.apache.catalina.cluster.tcp.ReplicationTransmitter replicationMode=pooled ackTimeout=15000/ Valve className=org.apache.catalina.cluster.tcp.ReplicationValve filter=.*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt; / Deployer className=org.apache.catalina.cluster.deploy.FarmWarDeployer tempDir=/tmp/war-temp/ deployDir=/tmp/war-deploy/ watchDir=/tmp/war-listen/ watchEnabled=false/ /Cluster - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: HttpSession Replication in Tomcat Cluster not working with EJ B's!
Filip, You were right. It's works with the handle. Thanx for all the co-operation. cheers Suraj -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 27, 2004 5:51 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! I think you need to store the EJBHandle, not the actual bean that you are referencing. is that what you are doing? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 24, 2004 4:20 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Andy, I agree with your point about a SFSB being an extension of a client. But then, if I store the 'state' alone in the httpsession and update the state by using a new SFSB everytime, the whole concept of SFSB's are lost. I would rather use a stateless session bean and use httpsession for persisting my conversational state. (I know this line of thinking against use of SFSB has been advocated many a times and is a different discussion altogether) I beleive what ur suggesting to be a workaround and is not an acceptable solution. My design requirement requires a SFSB and I need servlets to invoke my SFSB. I will also need to cluster the TC5 servers. Passing the reference within the servlet and between method calls is the only way to hold a handle and interact with a single instance of a SFSB. If I use a JBOSS 3.2.3 server which comes bundled with TC then JBOSS takes care of my httpSession sharing between the various JBOSS servers in the cluster. (JBOSS has a different mechanism for httpSession sharing). But I would like to have a multitier cluster with seperate TC clusters and seperate JBOSS clusters. So the end question would be if TC 5.0.18 has the capability to handle such a scenario or not. cheers Suraj -Original Message- From: Bodycombe, Andrew [mailto:[EMAIL PROTECTED] Sent: Monday, March 22, 2004 4:42 PM To: '[EMAIL PROTECTED]' Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Think of a stateful session bean as an extension of the client. By storing the remote reference inside your session, you are attempting to persist your Client extension across 2 different clients (2 different tomcat instances). I don't think this is a sensible idea, and I'm not sure it's even allowed. I would advise you not to store remote references inside your session objects. Try storing just the current 'state' inside the session. Use a ServiceLocator to get an instance of the session bean each time you need it, using the current session to populate the state. This may work better for you. Regards, Andy -Original Message- From: Suraj Prabhu To: [EMAIL PROTECTED] Sent: 19/03/2004 07:34 Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001 ,10.5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
good stuff, thanks for replying, that helps with the archives -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Monday, April 05, 2004 1:27 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Filip, You were right. It's works with the handle. Thanx for all the co-operation. cheers Suraj -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 27, 2004 5:51 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! I think you need to store the EJBHandle, not the actual bean that you are referencing. is that what you are doing? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 24, 2004 4:20 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Andy, I agree with your point about a SFSB being an extension of a client. But then, if I store the 'state' alone in the httpsession and update the state by using a new SFSB everytime, the whole concept of SFSB's are lost. I would rather use a stateless session bean and use httpsession for persisting my conversational state. (I know this line of thinking against use of SFSB has been advocated many a times and is a different discussion altogether) I beleive what ur suggesting to be a workaround and is not an acceptable solution. My design requirement requires a SFSB and I need servlets to invoke my SFSB. I will also need to cluster the TC5 servers. Passing the reference within the servlet and between method calls is the only way to hold a handle and interact with a single instance of a SFSB. If I use a JBOSS 3.2.3 server which comes bundled with TC then JBOSS takes care of my httpSession sharing between the various JBOSS servers in the cluster. (JBOSS has a different mechanism for httpSession sharing). But I would like to have a multitier cluster with seperate TC clusters and seperate JBOSS clusters. So the end question would be if TC 5.0.18 has the capability to handle such a scenario or not. cheers Suraj -Original Message- From: Bodycombe, Andrew [mailto:[EMAIL PROTECTED] Sent: Monday, March 22, 2004 4:42 PM To: '[EMAIL PROTECTED]' Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Think of a stateful session bean as an extension of the client. By storing the remote reference inside your session, you are attempting to persist your Client extension across 2 different clients (2 different tomcat instances). I don't think this is a sensible idea, and I'm not sure it's even allowed. I would advise you not to store remote references inside your session objects. Try storing just the current 'state' inside the session. Use a ServiceLocator to get an instance of the session bean each time you need it, using the current session to populate the state. This may work better for you. Regards, Andy -Original Message- From: Suraj Prabhu To: [EMAIL PROTECTED] Sent: 19/03/2004 07:34 Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001 ,10.5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine
Re: apache + 2 tomcat cluster memory problem
Thanks Filip. I only found the thread of mails starting March 17 with the title Horrible memory leak in tomcat 5.0.19 If this is indeed the mails you advised me to look at, here is what I found out: Our setup differs in a way that we are using mod_jk 1.2.5 instead of 2.0.2. So mod_jk 1.2.5 + Tomcat 5.0.19 has a memory leak problem as well. This suggests that maybe the problem is with Tomcat 5.0.19 (?) Appearantly someone else (Robert Kruger) had exactly the same problem and it was solved when they downgraded to Tomcat 5.0.18. We cannot do that either because of a bug fix regarding session states in 5.0.18. I don't mind using mod_jk 2.0.2 as long as it solves our problem; however there already seems to be a memory leak with the mod_jk 2.0.2 + tomcat 5.0.19 combination as well. In Robert's email, he predicts that maybe the problem is related to JMX registration issue described in http://www.mail-archive.com/[EMAIL PROTECTED]/ msg53035.html. I'll reply to his email to see if it was indeed the problem. What's the next step? Thanks, Asim On Mar 28, 2004, at 12:39 AM, Filip Hanik ((lists)) wrote: there was an earlier email about a mem leak in the connector for mod_jk, please go through the last weeks emails and let us know what you find out. Filip -Original Message- From: Asim Alp [mailto:[EMAIL PROTECTED] Sent: Saturday, March 27, 2004 7:55 PM To: Tomcat Users List Subject: apache + 2 tomcat cluster memory problem Hello everyone, I have 2 Tomcats (both 5.0.19) running on two separate machines. One machine also has Apache 2.0.49 installed on it for load balancing. Apache communicates with tomcat1 thru port 11005 and tomcat2 thru 12005. tomcat1 and Apache are on the same machine. Apache is set to forward /* to the load balancer (and then to Tomcats). We have over a hundred virtual hosts on our tomcats, so we don't want to worry about configuring Apache virtual hosts to serve the images and all the other files (that's why we forward /*, not just /*.jsp and /servlet/*). Both tomcats also have their http connector ports listening to port 8080 on their individual machines. We're using mod_jk_1.2.5_2.0.47.dll for Apache to Tomcat communication... Both our tomcats are running with the -Xms128m -Xmx256m options. With this configuration everything works perfect for about an hour, then our tomcats run out of memory... When we turn off clustering, and run a single Tomcat on port 80 (of course by shutting down Apache Httpd), we don't have any memory problems at all (for now, we're planning to use clustering to avoid down time, one server is actually enough to handle all the traffic). Does anyone have any idea why we'd run out of memory when our tomcats are talking to Apache through mod_jk? Thanks, Asim - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.614 / Virus Database: 393 - Release Date: 3/5/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.614 / Virus Database: 393 - Release Date: 3/5/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
apache + 2 tomcat cluster memory problem
Hello everyone, I have 2 Tomcats (both 5.0.19) running on two separate machines. One machine also has Apache 2.0.49 installed on it for load balancing. Apache communicates with tomcat1 thru port 11005 and tomcat2 thru 12005. tomcat1 and Apache are on the same machine. Apache is set to forward /* to the load balancer (and then to Tomcats). We have over a hundred virtual hosts on our tomcats, so we don't want to worry about configuring Apache virtual hosts to serve the images and all the other files (that's why we forward /*, not just /*.jsp and /servlet/*). Both tomcats also have their http connector ports listening to port 8080 on their individual machines. We're using mod_jk_1.2.5_2.0.47.dll for Apache to Tomcat communication... Both our tomcats are running with the -Xms128m -Xmx256m options. With this configuration everything works perfect for about an hour, then our tomcats run out of memory... When we turn off clustering, and run a single Tomcat on port 80 (of course by shutting down Apache Httpd), we don't have any memory problems at all (for now, we're planning to use clustering to avoid down time, one server is actually enough to handle all the traffic). Does anyone have any idea why we'd run out of memory when our tomcats are talking to Apache through mod_jk? Thanks, Asim - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: apache + 2 tomcat cluster memory problem
there was an earlier email about a mem leak in the connector for mod_jk, please go through the last weeks emails and let us know what you find out. Filip -Original Message- From: Asim Alp [mailto:[EMAIL PROTECTED] Sent: Saturday, March 27, 2004 7:55 PM To: Tomcat Users List Subject: apache + 2 tomcat cluster memory problem Hello everyone, I have 2 Tomcats (both 5.0.19) running on two separate machines. One machine also has Apache 2.0.49 installed on it for load balancing. Apache communicates with tomcat1 thru port 11005 and tomcat2 thru 12005. tomcat1 and Apache are on the same machine. Apache is set to forward /* to the load balancer (and then to Tomcats). We have over a hundred virtual hosts on our tomcats, so we don't want to worry about configuring Apache virtual hosts to serve the images and all the other files (that's why we forward /*, not just /*.jsp and /servlet/*). Both tomcats also have their http connector ports listening to port 8080 on their individual machines. We're using mod_jk_1.2.5_2.0.47.dll for Apache to Tomcat communication... Both our tomcats are running with the -Xms128m -Xmx256m options. With this configuration everything works perfect for about an hour, then our tomcats run out of memory... When we turn off clustering, and run a single Tomcat on port 80 (of course by shutting down Apache Httpd), we don't have any memory problems at all (for now, we're planning to use clustering to avoid down time, one server is actually enough to handle all the traffic). Does anyone have any idea why we'd run out of memory when our tomcats are talking to Apache through mod_jk? Thanks, Asim - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.614 / Virus Database: 393 - Release Date: 3/5/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.614 / Virus Database: 393 - Release Date: 3/5/2004 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: HttpSession Replication in Tomcat Cluster not working with EJ B's!
I think you need to store the EJBHandle, not the actual bean that you are referencing. is that what you are doing? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 24, 2004 4:20 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Andy, I agree with your point about a SFSB being an extension of a client. But then, if I store the 'state' alone in the httpsession and update the state by using a new SFSB everytime, the whole concept of SFSB's are lost. I would rather use a stateless session bean and use httpsession for persisting my conversational state. (I know this line of thinking against use of SFSB has been advocated many a times and is a different discussion altogether) I beleive what ur suggesting to be a workaround and is not an acceptable solution. My design requirement requires a SFSB and I need servlets to invoke my SFSB. I will also need to cluster the TC5 servers. Passing the reference within the servlet and between method calls is the only way to hold a handle and interact with a single instance of a SFSB. If I use a JBOSS 3.2.3 server which comes bundled with TC then JBOSS takes care of my httpSession sharing between the various JBOSS servers in the cluster. (JBOSS has a different mechanism for httpSession sharing). But I would like to have a multitier cluster with seperate TC clusters and seperate JBOSS clusters. So the end question would be if TC 5.0.18 has the capability to handle such a scenario or not. cheers Suraj -Original Message- From: Bodycombe, Andrew [mailto:[EMAIL PROTECTED] Sent: Monday, March 22, 2004 4:42 PM To: '[EMAIL PROTECTED]' Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Think of a stateful session bean as an extension of the client. By storing the remote reference inside your session, you are attempting to persist your Client extension across 2 different clients (2 different tomcat instances). I don't think this is a sensible idea, and I'm not sure it's even allowed. I would advise you not to store remote references inside your session objects. Try storing just the current 'state' inside the session. Use a ServiceLocator to get an instance of the session bean each time you need it, using the current session to populate the state. This may work better for you. Regards, Andy -Original Message- From: Suraj Prabhu To: [EMAIL PROTECTED] Sent: 19/03/2004 07:34 Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001 ,10.5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:400 1,10.5.18.27,4001, alive=45657] Mar 18, 2004 4:25
RE: HttpSession Replication in Tomcat Cluster not working with EJ B's!
Andy, I agree with your point about a SFSB being an extension of a client. But then, if I store the 'state' alone in the httpsession and update the state by using a new SFSB everytime, the whole concept of SFSB's are lost. I would rather use a stateless session bean and use httpsession for persisting my conversational state. (I know this line of thinking against use of SFSB has been advocated many a times and is a different discussion altogether) I beleive what ur suggesting to be a workaround and is not an acceptable solution. My design requirement requires a SFSB and I need servlets to invoke my SFSB. I will also need to cluster the TC5 servers. Passing the reference within the servlet and between method calls is the only way to hold a handle and interact with a single instance of a SFSB. If I use a JBOSS 3.2.3 server which comes bundled with TC then JBOSS takes care of my httpSession sharing between the various JBOSS servers in the cluster. (JBOSS has a different mechanism for httpSession sharing). But I would like to have a multitier cluster with seperate TC clusters and seperate JBOSS clusters. So the end question would be if TC 5.0.18 has the capability to handle such a scenario or not. cheers Suraj -Original Message- From: Bodycombe, Andrew [mailto:[EMAIL PROTECTED] Sent: Monday, March 22, 2004 4:42 PM To: '[EMAIL PROTECTED]' Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJ B's! Think of a stateful session bean as an extension of the client. By storing the remote reference inside your session, you are attempting to persist your Client extension across 2 different clients (2 different tomcat instances). I don't think this is a sensible idea, and I'm not sure it's even allowed. I would advise you not to store remote references inside your session objects. Try storing just the current 'state' inside the session. Use a ServiceLocator to get an instance of the session bean each time you need it, using the current session to populate the state. This may work better for you. Regards, Andy -Original Message- From: Suraj Prabhu To: [EMAIL PROTECTED] Sent: 19/03/2004 07:34 Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001 ,10.5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:400 1,10.5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM
RE: HttpSession Replication in Tomcat Cluster not working with EJ B's!
Think of a stateful session bean as an extension of the client. By storing the remote reference inside your session, you are attempting to persist your Client extension across 2 different clients (2 different tomcat instances). I don't think this is a sensible idea, and I'm not sure it's even allowed. I would advise you not to store remote references inside your session objects. Try storing just the current 'state' inside the session. Use a ServiceLocator to get an instance of the session bean each time you need it, using the current session to populate the state. This may work better for you. Regards, Andy -Original Message- From: Suraj Prabhu To: [EMAIL PROTECTED] Sent: 19/03/2004 07:34 Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001 ,10.5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:400 1,10.5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\balancer.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\manager.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Installing web application at context path /TestWeb from URL file:C:/Tomcat5/webapps/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager doLoad SEVERE: ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLo
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
yes please, that would be helpful, what version of tomcat? -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 11:49 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! Filip, Would you like me to fwd the war file??? Cheers Suraj -Original Message- From: Suraj Prabhu Sent: Saturday, March 20, 2004 1:12 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! it's in a chnr.jar file inside my TestWeb.war -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 1:10 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 11:26 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! Filip, Yes this class is on all the servers. Checked it up, no version clash either. Cheers. Suraj -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 12:10 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! are you sure this class is on all the servers? Filip -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 10:31 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Thursday, March 18, 2004 11:34 PM To: [EMAIL PROTECTED] Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10. 5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10 .5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
where is the class chnhr.EmployeeEditorSB stored? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Thursday, March 18, 2004 11:34 PM To: [EMAIL PROTECTED] Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10. 5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10 .5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\balancer.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\manager.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Installing web application at context path /TestWeb from URL file:C:/Tomcat5/webapps/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager doLoad SEVERE: ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader .java:891) at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader .java:756) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:219) at java.io.ObjectInputStream.resolveProxyClass(ObjectInputStream.java:630) at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1469) at java.io.ObjectInputStream.readClassDesc
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
are you sure this class is on all the servers? Filip -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 10:31 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Thursday, March 18, 2004 11:34 PM To: [EMAIL PROTECTED] Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10. 5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10 .5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\balancer.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\manager.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Installing web application at context path /TestWeb from URL file:C:/Tomcat5/webapps/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager doLoad SEVERE: ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader .java:891) at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader .java:756) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at java.lang.Class.forName0(Native Method
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
Filip, Yes this class is on all the servers. Checked it up, no version clash either. Cheers. Suraj -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 12:10 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! are you sure this class is on all the servers? Filip -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 10:31 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Thursday, March 18, 2004 11:34 PM To: [EMAIL PROTECTED] Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10. 5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10 .5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\balancer.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\manager.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Installing web application at context path /TestWeb from URL file:C:/Tomcat5/webapps/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager doLoad SEVERE: ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
where is the class chnhr.EmployeeEditorSB stored? -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 11:26 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! Filip, Yes this class is on all the servers. Checked it up, no version clash either. Cheers. Suraj -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 12:10 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! are you sure this class is on all the servers? Filip -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 10:31 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Thursday, March 18, 2004 11:34 PM To: [EMAIL PROTECTED] Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10. 5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10 .5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\balancer.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\manager.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Installing web application at context path /TestWeb from URL file:C:/Tomcat5/webapps/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/TestWeb Mar
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
it's in a chnr.jar file inside my TestWeb.war -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 1:10 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 11:26 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! Filip, Yes this class is on all the servers. Checked it up, no version clash either. Cheers. Suraj -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 12:10 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! are you sure this class is on all the servers? Filip -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 10:31 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Thursday, March 18, 2004 11:34 PM To: [EMAIL PROTECTED] Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10. 5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10 .5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\balancer.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\manager.xml Mar 18, 2004 4:25:16 PM
RE: HttpSession Replication in Tomcat Cluster not working with EJB's!
Filip, Would you like me to fwd the war file??? Cheers Suraj -Original Message- From: Suraj Prabhu Sent: Saturday, March 20, 2004 1:12 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! it's in a chnr.jar file inside my TestWeb.war -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 1:10 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 11:26 PM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! Filip, Yes this class is on all the servers. Checked it up, no version clash either. Cheers. Suraj -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Saturday, March 20, 2004 12:10 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! are you sure this class is on all the servers? Filip -Original Message- From: Filip Hanik (lists) [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 10:31 AM To: Tomcat Users List Subject: RE: HttpSession Replication in Tomcat Cluster not working with EJB's! where is the class chnhr.EmployeeEditorSB stored? Filip -Original Message- From: Suraj Prabhu [mailto:[EMAIL PROTECTED] Sent: Thursday, March 18, 2004 11:34 PM To: [EMAIL PROTECTED] Subject: HttpSession Replication in Tomcat Cluster not working with EJB's! Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10. 5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10 .5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5
HttpSession Replication in Tomcat Cluster not working with EJB's!
Hi everybody, I am trying to cluster Tomcat Servers ver 5.0.18 (Two servers) and my application servlets are accessing Stateful session beans. Typically, the first invocation of the servlet gets the Remote of the SFSB and stores it into the session. The other Tomcat's in the cluster throw up an error ClassNotFoundException while loading persisted sessions. I have the same war file deployed in all the Tomcats and the Tomcats in turn talk to the same app server (JBOSS 3.2.3). I am attaching my configuration and log outputs of both the servers. Would like to know if this is a bug/limitation or is there a solution to it. Cheers Suraj -- This is the log file o/p of the first server (which the client actually is accessing): INFO: Jk running ID=0 time=0/16 config=C:\Tomcat5\conf\jk2.properties Mar 18, 2004 4:25:40 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 5297 ms Mar 18, 2004 4:26:20 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.9:4001,10.5.18.9,4001, alive=16] This is the log file o/p of the second server (which starts up and joins the cluster after a session has been created in the first server) Mar 18, 2004 4:25:12 PM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on port Mar 18, 2004 4:25:12 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 1125 ms Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardService start INFO: Starting service Catalina Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/5.0.18 Mar 18, 2004 4:25:12 PM org.apache.catalina.core.StandardHost start INFO: XML validation disabled Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Cluster is about to start Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster start INFO: Sleeping for 2000 secs to establish cluster membership Mar 18, 2004 4:25:12 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster memberAdded INFO: Replication member added:org.apache.catalina.cluster.mcast.McastMember[tcp://10.5.18.27:4001,10.5.18.27,4001, alive=45657] Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHost getDeployer INFO: Create Host deployer for direct deployment ( non-jmx ) Mar 18, 2004 4:25:14 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\admin.xml Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.util.LocalStrings', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.struts.action.ActionResources', returnNull=true Mar 18, 2004 4:25:15 PM org.apache.struts.util.PropertyMessageResources init INFO: Initializing, config='org.apache.webapp.admin.ApplicationResources', returnNull=true Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\balancer.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Processing Context configuration file URL file:C:\Tomcat5\conf\Catalina\localhost\manager.xml Mar 18, 2004 4:25:16 PM org.apache.catalina.core.StandardHostDeployer install INFO: Installing web application at context path /TestWeb from URL file:C:/Tomcat5/webapps/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager start INFO: Starting clustering manager...:/TestWeb Mar 18, 2004 4:25:17 PM org.apache.catalina.cluster.session.DeltaManager doLoad SEVERE: ClassNotFoundException while loading persisted sessions: java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB java.lang.ClassNotFoundException: chnhr.EmployeeEditorSB at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:891) at org.apache.catalina.loader.StandardClassLoader.loadClass(StandardClassLoader.java:756) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:219) at java.io.ObjectInputStream.resolveProxyClass(ObjectInputStream.java:630) at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1469) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1432) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
Tomcat Cluster and Load Balancer
Hi Guys, Could anyone recommend a good place to start for setting up a Tomcat cluster on the same server? I also need a good/free load balancer that can integrate with this cluster. I understand Tomcat 5 can be clustered with a load balancer but have never done anything like it and would appreciate some newbie cluster pointers. At present we are running Tomcat 5.0.16 as a Windows 2000 service which is fed by IIS 5 via the JK2 ISAPI filter. How would I get IIS to talk to a load balancer and then to a Tomcat cluster? Also the server has 2 x 1.5Ghz CPUs, 2GB RAM if this is useful information to this topic. I'd be obliged if anybody could spare some time to advise on this. Many thanks indeed. FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Developers of QuickAddress Software a href=http://www.qas.com;www.qas.com/a Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Servlet context in tomcat cluster.
Howdy, The same code putting the object in the context will execute on all machines in the cluster. So while it won't be the same ServletContext object (it'd be a different memory address in a different JVM instance), the context will have the same attributes because your code executing in the cluster is consistent. If you mean to do something where client1 goes into tomcat1, puts object in context, and that object is now present in all contexts in the cluster, you're on your own. Yoav Shapira Millennium ChemInformatics -Original Message- From: Antony Paul [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 15, 2003 1:07 AM To: Tomcat Users List Subject: Servlet context in tomcat cluster. Hi, I need a quick answer. In Tomcat clustered environment(I dont know the configuration) is it possible to access the same servlet context on different machines from jsp and servlets. Is there any special coding required to do this. I wnat to put an object in the servlet context which is to be accessed by servlets and jsps. Antony Paul. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Servlet context in tomcat cluster.
Hi, I need a quick answer. In Tomcat clustered environment(I dont know the configuration) is it possible to access the same servlet context on different machines from jsp and servlets. Is there any special coding required to do this. I wnat to put an object in the servlet context which is to be accessed by servlets and jsps. Antony Paul. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat cluster tuning
Sorry can't give a recommendation. We had different results even for (nearly) the same software for different sites. For one site the IBM JDK worked best, for the other Sun's. Any given result may be wothless with the next version of either jdk. (Even with just changes in the minor revision) You have to test that - in your environment - with your application - with the expected behaviour of the users Even small changes in one of these setting can change the result which jdk is better for you. (At least that's our experience) -Original Message- From: Cristopher Daniluk [mailto:[EMAIL PROTECTED] Sent: Thursday, September 11, 2003 7:04 PM To: 'Tomcat Users List' Subject: RE: Tomcat cluster tuning Are there any recommendations for what JVM would work best? We're not doing anything fancy, so presumably any VM that works well with tomcat would work well for us. Are there any sites that talk about the different JVM tuning options that affect Tomcat? I haven't seen that many. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat cluster tuning
We are runing a cluster of 3 apache servers and 2 tomcat servers connected via AJP w/Oracle on backend. The cluster has been performing very well but we've had a recent load spike that's causing the tomcat servers to start swapping pretty hardcore despite JVM limitations. What is the -Xmx option limiting? Threads? Defined services? Instances of Tomcat? I would've thought that it would limit the entire tomcat instance, but we have been far exceeding the 768mb limit we set. We're connecting to Oracle on the back end via the JDBC thin client. When the site starts swapping, performance on Oracle queries goes exponentially downhill. A non-db page takes about 1 second to load before swapping, vs 5 seconds to load when its swapping. On the other hand, a db intensive page takes about 5 seconds to load normally, vs about 40-50 seconds when it begins to swap. That number begins to crawl quickly up until it exceeds the 5 minute max execution time and Tomcat cuts the request off. The servers are basically identically configured P1.8ghz machines with 1gb ram each. The connector line from server.xml is: Connector className=org.apache.coyote.tomcat4.CoyoteConnector port=8009 minProcessors=5 maxProcessors=100 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=-1 protocolHandlerClassName=org.apache.jk.server.JkCoyoteHandler / And we're running Apache 2.0.47 w/mod_jk1 and AJP1.3. the workers.properties is set to nonweighted balancing. Are there any options to tune tomcat to reduce memory footpritn and to let it queue more? We were initially running more maxProcessors but I turned it down hoping to alleviate the congestion. Tried turning it up thinking maybe the accept queue was the problem too, but that made it worse. Thanks, Cris - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat cluster tuning
mx is limiting the heap of a java process. In other words: It limits the total heap for one tomcat instance. The total memory can be much higher: - stacksize per thread Some vm's let you set these values (-Xss). If you have some hundred of threads that can make up some memory. - static memory (like string constants, the code, ...) That pretty much defined at compile time. - and may be further sorts of memories that depend on the vendor and version of the jdk. Regarding your config: You can try to play with the combination of maxProcessors connectionTimeout acceptCount I'm not shure how the accepted but not processed request are handled (wether they are queued in one thread, or if each has it's own thread) There isn't much more you can change in tomcat. The best recommendation I have is to find out where the memory comes from and either to cure the cause or find out that you have to live with that memory usage and spend more memory. -Original Message- From: Cristopher Daniluk [mailto:[EMAIL PROTECTED] Sent: Thursday, September 11, 2003 5:33 PM To: [EMAIL PROTECTED] Subject: Tomcat cluster tuning What is the -Xmx option limiting? Threads? Defined services? Instances of Tomcat? I would've thought that it would limit the entire tomcat instance, but we have been far exceeding the 768mb limit we set. Connector className=org.apache.coyote.tomcat4.CoyoteConnector port=8009 minProcessors=5 maxProcessors=100 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=-1 protocolHandlerClassName=org.apache.jk.server.JkCoyoteHandler / - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat cluster tuning
Are there any recommendations for what JVM would work best? We're not doing anything fancy, so presumably any VM that works well with tomcat would work well for us. Are there any sites that talk about the different JVM tuning options that affect Tomcat? I haven't seen that many. -Original Message- From: Ralph Einfeldt [mailto:[EMAIL PROTECTED] Sent: Thursday, September 11, 2003 12:46 PM To: Tomcat Users List Subject: RE: Tomcat cluster tuning mx is limiting the heap of a java process. In other words: It limits the total heap for one tomcat instance. The total memory can be much higher: - stacksize per thread Some vm's let you set these values (-Xss). If you have some hundred of threads that can make up some memory. - static memory (like string constants, the code, ...) That pretty much defined at compile time. - and may be further sorts of memories that depend on the vendor and version of the jdk. Regarding your config: You can try to play with the combination of maxProcessors connectionTimeout acceptCount I'm not shure how the accepted but not processed request are handled (wether they are queued in one thread, or if each has it's own thread) There isn't much more you can change in tomcat. The best recommendation I have is to find out where the memory comes from and either to cure the cause or find out that you have to live with that memory usage and spend more memory. -Original Message- From: Cristopher Daniluk [mailto:[EMAIL PROTECTED] Sent: Thursday, September 11, 2003 5:33 PM To: [EMAIL PROTECTED] Subject: Tomcat cluster tuning What is the -Xmx option limiting? Threads? Defined services? Instances of Tomcat? I would've thought that it would limit the entire tomcat instance, but we have been far exceeding the 768mb limit we set. Connector className=org.apache.coyote.tomcat4.CoyoteConnector port=8009 minProcessors=5 maxProcessors=100 enableLookups=true redirectPort=8443 acceptCount=100 debug=0 connectionTimeout=-1 protocolHandlerClassName=org.apache.jk.server.JkCoyoteHandler / - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: RE: File replication (Tomcat cluster ?)
For the deployment, there's no problem, But my application allow users to upload files in Tomcat, so I need a synchronisation between my 2 tomcat -Message d'origine- De : David Rees [mailto:[EMAIL PROTECTED] Envoyé : mercredi 16 juillet 2003 20:34 À : Tomcat Users List Objet : Re: RE: File replication (Tomcat cluster ?) Simon Pabst said: Or you just set up a script/cronjob to do an rsync or scp/rcp between the two local directories. Don't think Tomcat itself has anything which makes that possible (correct me if i'm wrong), maybe Tomcat 5 will. This is the method I would suggest using. Besides this, you can change your deployment procedures to deploy on all servers instead of just one. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: File replication (Tomcat cluster ?)
Nicolas LANTERNIER wrote: For the deployment, there's no problem, But my application allow users to upload files in Tomcat, so I need a synchronisation between my 2 tomcat Then your best bet is either use NFS orother shared filesystem (which IMO somewhat defeats the purpose of clustering Tomcat unless your goals are to only spread out the workload) or to implement the file distribution in your application itself or rsync or some other mechanism as someone else suggested. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat Integration with Apache (Tomcat cluster)
Hi all, I'm searching for the best way to Integrate tomcat with apache. is it using mod_jk or mod_webapp, or anyother method. regards Dasun - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Integration with Apache (Tomcat cluster)
From: Dasun Buddhika Ratnayake [EMAIL PROTECTED] I'm searching for the best way to Integrate tomcat with apache. is it using mod_jk or mod_webapp, or anyother method. use mod_jk mod_webapp is deprecated regards, Juan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Integration with Apache (Tomcat cluster)
Use Apache 2 with worker mpm if you want round robin to work with mod_jk1/2 sticky session. Use mod_jk 1 or 2 as connector. See http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jk2/jk/aphowto.html http://www.johnturner.com/howto/apache-tomcat-howto.html http://nagoya.apache.org/wiki/apachewiki.cgi?Tomcat/Jk2Connector At 14:35 17.07.2003 +0600, you wrote: Hi all, I'm searching for the best way to Integrate tomcat with apache. is it using mod_jk or mod_webapp, or anyother method. regards Dasun - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
File replication (Tomcat cluster ?)
Hello, I have two Tomcat Servers working in session cluster and I need to replicate the content of the Webapp directory. Is it possible ? and how to configure it ? ... Sorry for my poor english ___ Nicou
Re: File replication (Tomcat cluster ?)
Nicolas LANTERNIER wrote: I have two Tomcat Servers working in session cluster and I need to replicate the content of the Webapp directory. Is it possible ? and how to configure it ? This is not something that Tomcat will handle. You will need to setup your own replication of the document root. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: File replication (Tomcat cluster ?)
Normally there's no need for replicating your webapp, just put it somewhere outside the tomcat directories and point the application contexts in both tomcats to that directory (with absolute pathnames) At 17:13 16.07.2003 +0200, you wrote: Hello, I have two Tomcat Servers working in session cluster and I need to replicate the content of the Webapp directory. Is it possible ? and how to configure it ? ... Sorry for my poor english ___ Nicou - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: RE: File replication (Tomcat cluster ?)
Oh, didn't realize you're on different servers, too much thinking in our own setup, sry ;-) Hmm NFS has its own file caches so you could do that, besides Tomcat caches stuff in its own local work directory and Ram. Or you just set up a script/cronjob to do an rsync or scp/rcp between the two local directories. Don't think Tomcat itself has anything which makes that possible (correct me if i'm wrong), maybe Tomcat 5 will. Tomcat Users List [EMAIL PROTECTED] schrieb am 16.07.03 18:39:51: So I should share the same directory for the Tomcat Servers, with nfs ? Is It a Good Solution for High Load environment ? -Message d'origine- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Envoye : mercredi 16 juillet 2003 18:22 A : Tomcat Users List Objet : Re: File replication (Tomcat cluster ?) Normally there's no need for replicating your webapp, just put it somewhere outside the tomcat directories and point the application contexts in both tomcats to that directory (with absolute pathnames) At 17:13 16.07.2003 +0200, you wrote: Hello, I have two Tomcat Servers working in session cluster and I need to replicate the content of the Webapp directory. Is it possible ? and how to configure it ? ... Sorry for my poor english ___ Nicou - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Simon Pabst E-Mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: RE: File replication (Tomcat cluster ?)
Simon Pabst said: Or you just set up a script/cronjob to do an rsync or scp/rcp between the two local directories. Don't think Tomcat itself has anything which makes that possible (correct me if i'm wrong), maybe Tomcat 5 will. This is the method I would suggest using. Besides this, you can change your deployment procedures to deploy on all servers instead of just one. -Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
TOMCAT cluster ... request info
Hi all, we need to replicate HTTP session between TOMCAT istance/cluster on Win2000 (and in the next-time on Tru64 5.1B). We have TOMCAT v.4.0.6 (but we can change it). We have done some test with procedure suggest on TheServerSide.COM site - http://www.theserverside.com/resources/article.jsp?l=Tomcatbut, but we have some problems when try to use TOMCAT session example : --- type Exception report message Internal Server Error description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request. exception java.lang.NullPointerException at org.apache.catalina.session.InMemoryReplicationManager.createSession(InMemor yReplicationManager.java:212) at org.apache.catalina.session.InMemoryReplicationManager.createSession(InMemor yReplicationManager.java:242) at org.apache.catalina.connector.HttpRequestBase.doGetSession(HttpRequestBase.j ava:1134) - Do you have a suggestion about this ? What's tomcat's module to use ? any servlets examples ? What's the better TOMCAT version ? Thanks in advance. Best Regards Tony
Re: TOMCAT cluster ... request info
I'd try a more recent version of the session replication stuff, which will be used in tomcat 5 also (think it uses a similar codebase like that javagroups stuff): http://cvs.apache.org/~fhanik/index.html However there's an obstacle (true for that older version too) Make sure all your session attributes implement java.io.Serializable else Session replication (and your webapp) won't work At 17:00 11.07.2003 +0200, you wrote: Hi all, we need to replicate HTTP session between TOMCAT istance/cluster on Win2000 (and in the next-time on Tru64 5.1B). We have TOMCAT v.4.0.6 (but we can change it). We have done some test with procedure suggest on TheServerSide.COM site - http://www.theserverside.com/resources/article.jsp?l=Tomcatbut, but we have some problems when try to use TOMCAT session example : --- type Exception report message Internal Server Error description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request. exception java.lang.NullPointerException at org.apache.catalina.session.InMemoryReplicationManager.createSession(InMemor yReplicationManager.java:212) at org.apache.catalina.session.InMemoryReplicationManager.createSession(InMemor yReplicationManager.java:242) at org.apache.catalina.connector.HttpRequestBase.doGetSession(HttpRequestBase.j ava:1134) - Do you have a suggestion about this ? What's tomcat's module to use ? any servlets examples ? What's the better TOMCAT version ? Thanks in advance. Best Regards Tony - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Deserializing data objects using InMemoryReplicationManager on Tomcat cluster
I have noticed when using the InMemoryReplicationManager for web applications on a Tomcat cluster that you will encounter a ClassNotFoundException when trying to deserialize the session contents of serialized data objects specific to the web application (i.e. a given web application may have an Employee class that is stored in the session). Although this ClassNotFoundException is thrown by the InMemoryReplicationManager, it appears that the class actually is deserialized and replicated across the nodes of the cluster. My question is if this is an accurate assertion despite the ClassNotFoundException? Also, why is there a ClassNotFoundException being thrown? Is this because the InMemoryReplicationManager does not use the Web Application Class Loader, Shared Class Loader, etc.?
RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster
I haven't seen this problem, where is your Employee class file sitting? Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 8:24 AM To: [EMAIL PROTECTED] Subject: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I have noticed when using the InMemoryReplicationManager for web applications on a Tomcat cluster that you will encounter a ClassNotFoundException when trying to deserialize the session contents of serialized data objects specific to the web application (i.e. a given web application may have an Employee class that is stored in the session). Although this ClassNotFoundException is thrown by the InMemoryReplicationManager, it appears that the class actually is deserialized and replicated across the nodes of the cluster. My question is if this is an accurate assertion despite the ClassNotFoundException? Also, why is there a ClassNotFoundException being thrown? Is this because the InMemoryReplicationManager does not use the Web Application Class Loader, Shared Class Loader, etc.? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster
WEB-INF/classes/some.package.Employee If this Employee object is put in the session and then replicated across the nodes for the given web application, the other nodes will have ClassNotFoundExceptions when the InMemoryReplicationManager goes to deserialize the session contents. I see this exception in catalina.out when the debug level for the InMemoryReplicationManager is set to 10. -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:01 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I haven't seen this problem, where is your Employee class file sitting? Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 8:24 AM To: [EMAIL PROTECTED] Subject: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I have noticed when using the InMemoryReplicationManager for web applications on a Tomcat cluster that you will encounter a ClassNotFoundException when trying to deserialize the session contents of serialized data objects specific to the web application (i.e. a given web application may have an Employee class that is stored in the session). Although this ClassNotFoundException is thrown by the InMemoryReplicationManager, it appears that the class actually is deserialized and replicated across the nodes of the cluster. My question is if this is an accurate assertion despite the ClassNotFoundException? Also, why is there a ClassNotFoundException being thrown? Is this because the InMemoryReplicationManager does not use the Web Application Class Loader, Shared Class Loader, etc.? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster
it should be in WEB-INF/classes/some/package/Employee.class is that what you meant? never had this problem myself, what version of Tomcat? also, can you send the log trace for this Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 9:10 AM To: [EMAIL PROTECTED] Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster WEB-INF/classes/some.package.Employee If this Employee object is put in the session and then replicated across the nodes for the given web application, the other nodes will have ClassNotFoundExceptions when the InMemoryReplicationManager goes to deserialize the session contents. I see this exception in catalina.out when the debug level for the InMemoryReplicationManager is set to 10. -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:01 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I haven't seen this problem, where is your Employee class file sitting? Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 8:24 AM To: [EMAIL PROTECTED] Subject: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I have noticed when using the InMemoryReplicationManager for web applications on a Tomcat cluster that you will encounter a ClassNotFoundException when trying to deserialize the session contents of serialized data objects specific to the web application (i.e. a given web application may have an Employee class that is stored in the session). Although this ClassNotFoundException is thrown by the InMemoryReplicationManager, it appears that the class actually is deserialized and replicated across the nodes of the cluster. My question is if this is an accurate assertion despite the ClassNotFoundException? Also, why is there a ClassNotFoundException being thrown? Is this because the InMemoryReplicationManager does not use the Web Application Class Loader, Shared Class Loader, etc.? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster
Sorry, I meant / not . I have this running on a two node cluster, and even though the logs show this message on both nodes in catalina.out, I know that the data is replicating. I can shutdown one node, and the session data has persisted on the other. Here is the log message: [InMemoryReplicationManager] Failed to deserialize the session! java.lang.ClassNotFoundException: [Lnet.afni.webdevelopment.peoplesoftbonus.data.BonusSearchData; at org.apache.catalina.loader.StandardClassLoader.loadClass(Unknown Source) at org.apache.catalina.loader.StandardClassLoader.loadClass(Unknown Source) at org.apache.catalina.session.ReplicationStream.resolveClass(ReplicationStream .java:124) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1513) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1560) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324) at org.apache.catalina.session.StandardSession.readObject(Unknown Source) at org.apache.catalina.session.StandardSession.readObjectData(Unknown Source) at org.apache.catalina.session.ReplicatedSession.readObjectData(ReplicatedSessi on.java:334) at org.apache.catalina.session.InMemoryReplicationManager.readSession(InMemoryR eplicationManager.java:529) at org.apache.catalina.session.InMemoryReplicationManager.messageReceived(InMem oryReplicationManager.java:831) at org.apache.catalina.session.InMemoryReplicationManager.messageDataReceived(I nMemoryReplicationManager.java:915) at org.apache.catalina.cluster.ObjectReader.append(ObjectReader.java:45) at org.apache.catalina.cluster.WorkerThread.drainChannel(WorkerThread.java:121) at org.apache.catalina.cluster.WorkerThread.run(WorkerThread.java:60) [InMemoryReplicationManager] Unable to receive message through TCP channel java.lang.NullPointerException at org.apache.catalina.session.InMemoryReplicationManager.messageReceived(InMem oryReplicationManager.java:832) at org.apache.catalina.session.InMemoryReplicationManager.messageDataReceived(I nMemoryReplicationManager.java:915) at org.apache.catalina.cluster.ObjectReader.append(ObjectReader.java:45) at org.apache.catalina.cluster.WorkerThread.drainChannel(WorkerThread.java:121) at org.apache.catalina.cluster.WorkerThread.run(WorkerThread.java:60) -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:13 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster it should be in WEB-INF/classes/some/package/Employee.class is that what you meant? never had this problem myself, what version of Tomcat? also, can you send the log trace for this Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 9:10 AM To: [EMAIL PROTECTED] Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster WEB-INF/classes/some.package.Employee If this Employee object is put in the session and then replicated across the nodes for the given web application, the other nodes will have ClassNotFoundExceptions when the InMemoryReplicationManager goes to deserialize the session contents. I see this exception in catalina.out when the debug level for the InMemoryReplicationManager is set to 10. -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:01 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I haven't seen this problem, where is your Employee class file sitting? Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 8:24 AM To: [EMAIL PROTECTED] Subject: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I have noticed when using the InMemoryReplicationManager for web applications on a Tomcat cluster that you will encounter a ClassNotFoundException when trying to deserialize the session contents of serialized data objects specific to the web application (i.e. a given web application may have an Employee class that is stored in the session). Although this ClassNotFoundException is thrown by the InMemoryReplicationManager, it appears that the class actually is deserialized and replicated across the nodes of the cluster. My question is if this is an accurate assertion despite the ClassNotFoundException? Also, why is there a ClassNotFoundException being thrown? Is this because the InMemoryReplicationManager does not use the Web Application Class Loader, Shared Class
RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster
where is this class located? net.afni.webdevelopment.peoplesoftbonus.data.BonusSearchData Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 9:34 AM To: [EMAIL PROTECTED] Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster Sorry, I meant / not . I have this running on a two node cluster, and even though the logs show this message on both nodes in catalina.out, I know that the data is replicating. I can shutdown one node, and the session data has persisted on the other. Here is the log message: [InMemoryReplicationManager] Failed to deserialize the session! java.lang.ClassNotFoundException: [Lnet.afni.webdevelopment.peoplesoftbonus.data.BonusSearchData; at org.apache.catalina.loader.StandardClassLoader.loadClass(Unknown Source) at org.apache.catalina.loader.StandardClassLoader.loadClass(Unknown Source) at org.apache.catalina.session.ReplicationStream.resolveClass(Replica tionStream .java:124) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1513) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1560) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324) at org.apache.catalina.session.StandardSession.readObject(Unknown Source) at org.apache.catalina.session.StandardSession.readObjectData(Unknown Source) at org.apache.catalina.session.ReplicatedSession.readObjectData(Repli catedSessi on.java:334) at org.apache.catalina.session.InMemoryReplicationManager.readSession (InMemoryR eplicationManager.java:529) at org.apache.catalina.session.InMemoryReplicationManager.messageRece ived(InMem oryReplicationManager.java:831) at org.apache.catalina.session.InMemoryReplicationManager.messageData Received(I nMemoryReplicationManager.java:915) at org.apache.catalina.cluster.ObjectReader.append(ObjectReader.java:45) at org.apache.catalina.cluster.WorkerThread.drainChannel(WorkerThread .java:121) at org.apache.catalina.cluster.WorkerThread.run(WorkerThread.java:60) [InMemoryReplicationManager] Unable to receive message through TCP channel java.lang.NullPointerException at org.apache.catalina.session.InMemoryReplicationManager.messageRece ived(InMem oryReplicationManager.java:832) at org.apache.catalina.session.InMemoryReplicationManager.messageData Received(I nMemoryReplicationManager.java:915) at org.apache.catalina.cluster.ObjectReader.append(ObjectReader.java:45) at org.apache.catalina.cluster.WorkerThread.drainChannel(WorkerThread .java:121) at org.apache.catalina.cluster.WorkerThread.run(WorkerThread.java:60) -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:13 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster it should be in WEB-INF/classes/some/package/Employee.class is that what you meant? never had this problem myself, what version of Tomcat? also, can you send the log trace for this Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 9:10 AM To: [EMAIL PROTECTED] Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster WEB-INF/classes/some.package.Employee If this Employee object is put in the session and then replicated across the nodes for the given web application, the other nodes will have ClassNotFoundExceptions when the InMemoryReplicationManager goes to deserialize the session contents. I see this exception in catalina.out when the debug level for the InMemoryReplicationManager is set to 10. -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:01 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I haven't seen this problem, where is your Employee class file sitting? Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 8:24 AM To: [EMAIL PROTECTED] Subject: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I have noticed when using the InMemoryReplicationManager for web applications on a Tomcat cluster that you will encounter a ClassNotFoundException when trying to deserialize the session contents of serialized data objects specific to the web application (i.e. a given web application may have an Employee class that is stored
RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster
WEB-INF/classes/net/afni/webdevelopment/peoplesoftbonus/data/BonusSearchData -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:41 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster where is this class located? net.afni.webdevelopment.peoplesoftbonus.data.BonusSearchData Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 9:34 AM To: [EMAIL PROTECTED] Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster Sorry, I meant / not . I have this running on a two node cluster, and even though the logs show this message on both nodes in catalina.out, I know that the data is replicating. I can shutdown one node, and the session data has persisted on the other. Here is the log message: [InMemoryReplicationManager] Failed to deserialize the session! java.lang.ClassNotFoundException: [Lnet.afni.webdevelopment.peoplesoftbonus.data.BonusSearchData; at org.apache.catalina.loader.StandardClassLoader.loadClass(Unknown Source) at org.apache.catalina.loader.StandardClassLoader.loadClass(Unknown Source) at org.apache.catalina.session.ReplicationStream.resolveClass(Replica tionStream .java:124) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1513) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435) at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1560) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1271) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324) at org.apache.catalina.session.StandardSession.readObject(Unknown Source) at org.apache.catalina.session.StandardSession.readObjectData(Unknown Source) at org.apache.catalina.session.ReplicatedSession.readObjectData(Repli catedSessi on.java:334) at org.apache.catalina.session.InMemoryReplicationManager.readSession (InMemoryR eplicationManager.java:529) at org.apache.catalina.session.InMemoryReplicationManager.messageRece ived(InMem oryReplicationManager.java:831) at org.apache.catalina.session.InMemoryReplicationManager.messageData Received(I nMemoryReplicationManager.java:915) at org.apache.catalina.cluster.ObjectReader.append(ObjectReader.java:45) at org.apache.catalina.cluster.WorkerThread.drainChannel(WorkerThread .java:121) at org.apache.catalina.cluster.WorkerThread.run(WorkerThread.java:60) [InMemoryReplicationManager] Unable to receive message through TCP channel java.lang.NullPointerException at org.apache.catalina.session.InMemoryReplicationManager.messageRece ived(InMem oryReplicationManager.java:832) at org.apache.catalina.session.InMemoryReplicationManager.messageData Received(I nMemoryReplicationManager.java:915) at org.apache.catalina.cluster.ObjectReader.append(ObjectReader.java:45) at org.apache.catalina.cluster.WorkerThread.drainChannel(WorkerThread .java:121) at org.apache.catalina.cluster.WorkerThread.run(WorkerThread.java:60) -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:13 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster it should be in WEB-INF/classes/some/package/Employee.class is that what you meant? never had this problem myself, what version of Tomcat? also, can you send the log trace for this Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 9:10 AM To: [EMAIL PROTECTED] Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster WEB-INF/classes/some.package.Employee If this Employee object is put in the session and then replicated across the nodes for the given web application, the other nodes will have ClassNotFoundExceptions when the InMemoryReplicationManager goes to deserialize the session contents. I see this exception in catalina.out when the debug level for the InMemoryReplicationManager is set to 10. -Original Message- From: Filip Hanik [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 11:01 AM To: Tomcat Users List Subject: RE: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I haven't seen this problem, where is your Employee class file sitting? Filip -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, June 13, 2003 8:24 AM To: [EMAIL PROTECTED] Subject: Deserializing data objects using InMemoryReplicationManager on Tomcat cluster I have noticed when using
Debugging tomcat cluster performance (Apache1.3+mod_jk+Tomcat4.1.18)
Hi! Is there any way to debug performance/load of particular node in tomcat cluster? I remember that it was possible with JServ to configure log file so, that it contained information about how many requests are served by each node. I tried to configure JkRequestLogFormat to do the same thing, but it can show only worker name, which is 'loadbalancer' for all requests. It seems that increasing JkLogLevel doesn't help too. Do you have any other ideas? I'd like to get an info like this: Worker Request ExecTime tomcat1 /servlet/some.servlet2 2.34 tomcat2 /servlet/some.other.servlet 3.12 tomcat3 /servlet/some.servlet 0.28 tomcat2 /servlet/some.servlet3 1.21 with workers.properties like this: [...] worker.list=loadbalancer worker.loadbalancer.balanced_workers=tomcat1,tomcat2,tomcat3 [...] If it is not possible with mod_jk - maybe mod_jk2 has similar feature? TIA Richard. -- First they ignore you. Then they laugh at you. Then they fight you. Then you win. - Mohandas Gandhi. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
concern about Apache + mod_jk + Tomcat cluster
Hi, I installed the Apache1.3.27, mod_jk1.2.1 and Tomcat4.1.18 recently on our Solaris6 machine. The approach is that let 1 apache as web server dispatches requestes to the 3 tomcat server instances. There is no error in the configuration, and install. But when I was load-testing the application, I noticed that there were lots of error message shown in the mod_jk file, although all the requests were dispatched to the tomcat servers and responded with 200. I then changed the 3 tomcat servers' configure as following: Connector className=org.apache.ajp.tomcat4.Ajp13Connector port=11009 minProcessors=1 maxProcessors=1 acceptCount=10 debug=1/ So now every Tomcat can only accept 1 request at the same time. I then sent 3 concurrent requests to the cluster: tomcat21, tomcat22, tomcat23. From the debug/log file, I think the mod_jk and tomcats are working like : 1, 3 requests reaches mod_jk, mod_jk sends requests to tomcat21 2, tomcat21 accepts the first one and rejects the other 2, 3, mod_jk logs errors in mod_jk.log, reports the tomcat is down or network problem. 4, mod_jk then sends the 2 to tomcat22 5, tomcat22 accepts 1 and rejects the other. 6, mod_jk again logs errors. 7. mod_jk sends the alst one to tomcat23, 8, tomcat 23 accepts it. I think there is nothing wrong with this procedure, but besides the annoying error messages, the whole performance is poor due to the time spent in the probes. I also suspect that the socket connection in Solaris6 is too slow, for some reason. I have questions for those who have the tomcat cluster in there production site: how about the performance in your site? Is there anything wrong with my configuration or should I use JK2 to improve performance? The configuration files and log files are attached with this email. OS: Solaris 6 Apache1.3.27, Tomcat 4.1.18, mod_jk1.2.1( I can not find the binary mod_jk at the apache.org site under solaris6 directory, so, I download the one in Solaris8 dir). Thanks, Jerry You tomcat_23_catalina.log the_change_to_httpd.conf workers.properties change_to_tomcat21_server.xml tomcat_21_catalina.log tomact_22_catalina.log tomcat_23_catalina.log Description: Binary data the_change_to_httpd.conf Description: Binary data workers.properties Description: Binary data change_to_tomcat21_server.xml Description: Binary data tomcat_21_catalina.log Description: Binary data tomact_22_catalina.log Description: Binary data -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: concern about Apache + mod_jk + Tomcat cluster
Hi, Make sure you have set the MaxProcessors property of the AJP13 Connector in server.xml to an equal or higher value as specified in MaxClients of the httpd.conf. llap, julian - Original Message - From: YOU, JERRY (SBCSI) [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, January 15, 2003 6:04 PM Subject: concern about Apache + mod_jk + Tomcat cluster Hi, I installed the Apache1.3.27, mod_jk1.2.1 and Tomcat4.1.18 recently on our Solaris6 machine. The approach is that let 1 apache as web server dispatches requestes to the 3 tomcat server instances. There is no error in the configuration, and install. But when I was load-testing the application, I noticed that there were lots of error message shown in the mod_jk file, although all the requests were dispatched to the tomcat servers and responded with 200. I then changed the 3 tomcat servers' configure as following: Connector className=org.apache.ajp.tomcat4.Ajp13Connector port=11009 minProcessors=1 maxProcessors=1 acceptCount=10 debug=1/ So now every Tomcat can only accept 1 request at the same time. I then sent 3 concurrent requests to the cluster: tomcat21, tomcat22, tomcat23. From the debug/log file, I think the mod_jk and tomcats are working like : 1, 3 requests reaches mod_jk, mod_jk sends requests to tomcat21 2, tomcat21 accepts the first one and rejects the other 2, 3, mod_jk logs errors in mod_jk.log, reports the tomcat is down or network problem. 4, mod_jk then sends the 2 to tomcat22 5, tomcat22 accepts 1 and rejects the other. 6, mod_jk again logs errors. 7. mod_jk sends the alst one to tomcat23, 8, tomcat 23 accepts it. I think there is nothing wrong with this procedure, but besides the annoying error messages, the whole performance is poor due to the time spent in the probes. I also suspect that the socket connection in Solaris6 is too slow, for some reason. I have questions for those who have the tomcat cluster in there production site: how about the performance in your site? Is there anything wrong with my configuration or should I use JK2 to improve performance? The configuration files and log files are attached with this email. OS: Solaris 6 Apache1.3.27, Tomcat 4.1.18, mod_jk1.2.1( I can not find the binary mod_jk at the apache.org site under solaris6 directory, so, I download the one in Solaris8 dir). Thanks, Jerry You tomcat_23_catalina.log the_change_to_httpd.conf workers.properties change_to_tomcat21_server.xml tomcat_21_catalina.log tomact_22_catalina.log -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: concern about Apache + mod_jk + Tomcat cluster
Can you post the workers.properties file? I use equal lblweight (I think that is the name of the property) set to 100 for the 4 Tomcat instances. I have a nearly identical setup: twp Apache 1.3.27 server running on Redhat 7.3 load balancing across 4.0.6 Tomcat instances running on two Solaris 8 servers. We have no performance issues and I am using the default Processor settings in server.xml. We go through roughly 1 million hits a month. HTH, Ben Ricker On Wed, 2003-01-15 at 11:04, YOU, JERRY (SBCSI) wrote: Hi, I installed the Apache1.3.27, mod_jk1.2.1 and Tomcat4.1.18 recently on our Solaris6 machine. The approach is that let 1 apache as web server dispatches requestes to the 3 tomcat server instances. There is no error in the configuration, and install. But when I was load-testing the application, I noticed that there were lots of error message shown in the mod_jk file, although all the requests were dispatched to the tomcat servers and responded with 200. I then changed the 3 tomcat servers' configure as following: Connector className=org.apache.ajp.tomcat4.Ajp13Connector port=11009 minProcessors=1 maxProcessors=1 acceptCount=10 debug=1/ So now every Tomcat can only accept 1 request at the same time. I then sent 3 concurrent requests to the cluster: tomcat21, tomcat22, tomcat23. From the debug/log file, I think the mod_jk and tomcats are working like : 1, 3 requests reaches mod_jk, mod_jk sends requests to tomcat21 2, tomcat21 accepts the first one and rejects the other 2, 3, mod_jk logs errors in mod_jk.log, reports the tomcat is down or network problem. 4, mod_jk then sends the 2 to tomcat22 5, tomcat22 accepts 1 and rejects the other. 6, mod_jk again logs errors. 7. mod_jk sends the alst one to tomcat23, 8, tomcat 23 accepts it. I think there is nothing wrong with this procedure, but besides the annoying error messages, the whole performance is poor due to the time spent in the probes. I also suspect that the socket connection in Solaris6 is too slow, for some reason. I have questions for those who have the tomcat cluster in there production site: how about the performance in your site? Is there anything wrong with my configuration or should I use JK2 to improve performance? The configuration files and log files are attached with this email. OS: Solaris 6 Apache1.3.27, Tomcat 4.1.18, mod_jk1.2.1( I can not find the binary mod_jk at the apache.org site under solaris6 directory, so, I download the one in Solaris8 dir). Thanks, Jerry You tomcat_23_catalina.log the_change_to_httpd.conf workers.properties change_to_tomcat21_server.xml tomcat_21_catalina.log tomact_22_catalina.log __ -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: concern about Apache + mod_jk + Tomcat cluster
Here is the workers.properties. One thing to note is that I downloaded the mod_jk from apache.org. I can only find binary mod_jk_1.3_eapi.so (and no_eapi.so) from Solaris8 directory. So, I use it on Solaris6 system. Also, all the servers including apache, tomcats are running on the same machine (5G mem). I use the grinder http://grinder.sourceforge.net/ as load testing tool. Thanks, Jerry You -Original Message- From: Ben Ricker [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 15, 2003 12:54 PM To: '[EMAIL PROTECTED]' Subject: Re: concern about Apache + mod_jk + Tomcat cluster Can you post the workers.properties file? I use equal lblweight (I think that is the name of the property) set to 100 for the 4 Tomcat instances. I have a nearly identical setup: twp Apache 1.3.27 server running on Redhat 7.3 load balancing across 4.0.6 Tomcat instances running on two Solaris 8 servers. We have no performance issues and I am using the default Processor settings in server.xml. We go through roughly 1 million hits a month. HTH, Ben Ricker On Wed, 2003-01-15 at 11:04, YOU, JERRY (SBCSI) wrote: Hi, I installed the Apache1.3.27, mod_jk1.2.1 and Tomcat4.1.18 recently on our Solaris6 machine. The approach is that let 1 apache as web server dispatches requestes to the 3 tomcat server instances. There is no error in the configuration, and install. But when I was load-testing the application, I noticed that there were lots of error message shown in the mod_jk file, although all the requests were dispatched to the tomcat servers and responded with 200. I then changed the 3 tomcat servers' configure as following: Connector className=org.apache.ajp.tomcat4.Ajp13Connector port=11009 minProcessors=1 maxProcessors=1 acceptCount=10 debug=1/ So now every Tomcat can only accept 1 request at the same time. I then sent 3 concurrent requests to the cluster: tomcat21, tomcat22, tomcat23. From the debug/log file, I think the mod_jk and tomcats are working like : 1, 3 requests reaches mod_jk, mod_jk sends requests to tomcat21 2, tomcat21 accepts the first one and rejects the other 2, 3, mod_jk logs errors in mod_jk.log, reports the tomcat is down or network problem. 4, mod_jk then sends the 2 to tomcat22 5, tomcat22 accepts 1 and rejects the other. 6, mod_jk again logs errors. 7. mod_jk sends the alst one to tomcat23, 8, tomcat 23 accepts it. I think there is nothing wrong with this procedure, but besides the annoying error messages, the whole performance is poor due to the time spent in the probes. I also suspect that the socket connection in Solaris6 is too slow, for some reason. I have questions for those who have the tomcat cluster in there production site: how about the performance in your site? Is there anything wrong with my configuration or should I use JK2 to improve performance? The configuration files and log files are attached with this email. OS: Solaris 6 Apache1.3.27, Tomcat 4.1.18, mod_jk1.2.1( I can not find the binary mod_jk at the apache.org site under solaris6 directory, so, I download the one in Solaris8 dir). Thanks, Jerry You tomcat_23_catalina.log the_change_to_httpd.conf workers.properties change_to_tomcat21_server.xml tomcat_21_catalina.log tomact_22_catalina.log __ -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- Ben Ricker [EMAIL PROTECTED] Wellinx.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] workers.properties Description: Binary data -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Tomcat cluster
Has anybody any book online, or tutorial about how use Tomcat in cluster ? Thanks !!! _ MSN Photos é a maneira mais fácil e prática de editar e compartilhar sua fotos: http://photos.msn.com.br -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
AW: Tomcat cluster
Here is some brain food: http://www.ubeans.com/tomcat http://www.onjava.com/pub/a/onjava/2002/07/17/tomcluster.html http://www.onjava.com/lpt/a/1228 http://www.javaworld.com/javaworld/jw-12-2000/jw-1221-servlets.html -Ursprüngliche Nachricht- Von: Ricardo de Souza Moura [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 10. Oktober 2002 15:39 An: [EMAIL PROTECTED] Betreff: Tomcat cluster Has anybody any book online, or tutorial about how use Tomcat in cluster ? -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat cluster
On 2002-10-10 Ricardo de Souza Moura wrote: Has anybody any book online, or tutorial about how use Tomcat in cluster ? Thanks !!! Hi. You might wanna try http://www.theserverside.com/resources/index.jsp and select link Clustering Technologies: In Memory Session Replication in Tomcat 4. - Toni -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat cluster
Here it is more links: http://www2.theserverside.com/resources/article.jsp?l=Tomcat http://www.onjava.com/lpt/a/2422 Luiz Ricardo - Original Message - From: Ralph Einfeldt [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, October 10, 2002 10:57 AM Subject: AW: Tomcat cluster Here is some brain food: http://www.ubeans.com/tomcat http://www.onjava.com/pub/a/onjava/2002/07/17/tomcluster.html http://www.onjava.com/lpt/a/1228 http://www.javaworld.com/javaworld/jw-12-2000/jw-1221-servlets.html -Ursprüngliche Nachricht- Von: Ricardo de Souza Moura [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 10. Oktober 2002 15:39 An: [EMAIL PROTECTED] Betreff: Tomcat cluster Has anybody any book online, or tutorial about how use Tomcat in cluster ? -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: AW: Tomcat cluster
Thanks for all !! From: Ralph Einfeldt [EMAIL PROTECTED] Reply-To: Tomcat Users List [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Subject: AW: Tomcat cluster Date: Thu, 10 Oct 2002 15:57:02 +0200 Here is some brain food: http://www.ubeans.com/tomcat http://www.onjava.com/pub/a/onjava/2002/07/17/tomcluster.html http://www.onjava.com/lpt/a/1228 http://www.javaworld.com/javaworld/jw-12-2000/jw-1221-servlets.html -Ursprüngliche Nachricht- Von: Ricardo de Souza Moura [mailto:[EMAIL PROTECTED]] Gesendet: Donnerstag, 10. Oktober 2002 15:39 An: [EMAIL PROTECTED] Betreff: Tomcat cluster Has anybody any book online, or tutorial about how use Tomcat in cluster ? -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] _ Converse com seus amigos online, faça o download grátis do MSN Messenger: http://messenger.msn.com.br -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Failover in Apache/Tomcat cluster
http://e-docs.bea.com/wls/docs70/cluster/servlet.html#1006761 Basically, the load balancer assigned each request with 2 server: one primary, one secondary. The client's session is replica between the primary and secondary server. When the primary fails, the secondary server will take over. thanks. __ Your favorite stores, helpful shopping tools and great gift ideas. Experience the convenience of buying online with Shop@Netscape! http://shopnow.netscape.com/ Get your own FREE, personal Netscape Mail account today at http://webmail.netscape.com/ -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
