tomcat6 status results into dead state
Hi,
When i start tomcat6 two times without a stop in between, rctomcat6 status
results into dead state.
I checked the rctomcat6 start script, in this case when the tomcat6 is
already running and a rctomcat6 start is done, it display a msg that
process already running, but it continues in the start function further
down executes the
TOMCAT_SCRIPT(dtomcat6) script with the start argument. And after that pid
in the tomcat6.pid file gets changed but the process keeps running with the
old pid, and hence when we do a rctomcat6 status, it results into dead
state(bcoz it doesn't find any process running with that pid).
I think it shouldn't execute the TOMCAT_SCRIPT in this case, so in case
when checkpid is success(in start function), i put an exit after the echo
msg process already running, this solves the problem, but is this the
correct solution ?
If you think its not the right solution, plz suggest me something
appropriate.
function start() {
echo -n Starting Tomcat ($CATALINA_BASE)
if [ -f /var/lock/subsys/${NAME} ] ; then
if [ -f /var/run/${NAME}.pid ]; then
read kpid /var/run/${NAME}.pid
if checkpid $kpid 21; then
echo $NAME process already running
rc_failed 0
#The below exit i have added
exit
else
echo -n lock file found but no process running for
pid $kpid, continuing
rc_failed 7
fi
fi
fi
.
.
regards
rahul
Re: tomcat6 status results into dead state
Hi.
This startup script is not part of the standard Tomcat distribution from
http://tomcat.apache.org
It was created by whoever created the distribution-specific tomcat package on your brand
of system (we don't know which, because you do not say).
(e.g. : apt-get install tomcat6 on a Debian linux system, or similar)
In other words, you should communicate this problem to these people, not to this
tomcat-users list.
rahul vatsa wrote:
Hi,
When i start tomcat6 two times without a stop in between, rctomcat6 status
results into dead state.
I checked the rctomcat6 start script, in this case when the tomcat6 is
already running and a rctomcat6 start is done, it display a msg that
process already running, but it continues in the start function further
down executes the
TOMCAT_SCRIPT(dtomcat6) script with the start argument. And after that pid
in the tomcat6.pid file gets changed but the process keeps running with the
old pid, and hence when we do a rctomcat6 status, it results into dead
state(bcoz it doesn't find any process running with that pid).
I think it shouldn't execute the TOMCAT_SCRIPT in this case, so in case
when checkpid is success(in start function), i put an exit after the echo
msg process already running, this solves the problem, but is this the
correct solution ?
If you think its not the right solution, plz suggest me something
appropriate.
function start() {
echo -n Starting Tomcat ($CATALINA_BASE)
if [ -f /var/lock/subsys/${NAME} ] ; then
if [ -f /var/run/${NAME}.pid ]; then
read kpid /var/run/${NAME}.pid
if checkpid $kpid 21; then
echo $NAME process already running
rc_failed 0
#The below exit i have added
exit
else
echo -n lock file found but no process running for
pid $kpid, continuing
rc_failed 7
fi
fi
fi
.
.
regards
rahul
-
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Tomcat 7 - does unpackWars=false work
On 15/02/2011 21:47, Caldarale, Charles R wrote: From: afk...@gmail.com [mailto:afk...@gmail.com] On Behalf Of Afkham Azeez Subject: Tomcat 7 - does unpackWars=false work In my server.xml file, I have set unpackWars to false as follows: Host name=localhost appBase=webapps unpackWARs=false autoDeploy=true However, my WAR files are still being unpacked into the work directory. Am I missing something? Just the fact that the .war files have to be unpacked somewhere; No they don't. Tomcat will run an application quite happily directly from a WAR. all the config tag does is prevent them from being unpacked into the Host appBase directory. Unpacking into the work directory is a side-effect of enabling either antiJARLocking or antiResourceLocking. Mark - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Tomcat 6 - Multiple JMX Remote Lifecycle Listeners
Hi, I'm running Tomcat 6.0.23 and Sun Java 1.6.0.22 on RHEL 5.6 x86_64. I've currently got one JMX Remote Lifecycle listener configured in server.xml: Listener className=org.apache.catalina.mbeans.JmxRemoteLifecycleListener rmiRegistryPortPlatform=X rmiServerPortPlatform=X+1 useLocalPorts=true / !-- For SSH Tunnelling -- We use this to connect JConsole to the system via an SSH tunnel. However I have a local system on the same lan that I would now like to use. Can I add another listener with different ports (and no useLocalPorts=true) or should I use rmiRegistryPort as the same or should I avoid having two of these listeners at all. Thanks, -- Best Regards, Brett Delle Grazie - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Tomcat 7 - does unpackWars=false work
I explicitly set antiJARLocking and antiResourceLocking to false and now it is is working as expected. I;m using Embedded Tomcat. Thanks guys. Azeez On Wed, Feb 16, 2011 at 4:05 PM, Mark Thomas ma...@apache.org wrote: On 15/02/2011 21:47, Caldarale, Charles R wrote: From: afk...@gmail.com [mailto:afk...@gmail.com] On Behalf Of Afkham Azeez Subject: Tomcat 7 - does unpackWars=false work In my server.xml file, I have set unpackWars to false as follows: Host name=localhost appBase=webapps unpackWARs=false autoDeploy=true However, my WAR files are still being unpacked into the work directory. Am I missing something? Just the fact that the .war files have to be unpacked somewhere; No they don't. Tomcat will run an application quite happily directly from a WAR. all the config tag does is prevent them from being unpacked into the Host appBase directory. Unpacking into the work directory is a side-effect of enabling either antiJARLocking or antiResourceLocking. Mark - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org -- *Afkham Azeez* Senior Software Architect Senior Manager; WSO2, Inc.; http://wso2.com, * * *Member; Apache Software Foundation; **http://www.apache.org/*http://www.apache.org/ * email: **az...@wso2.com* az...@wso2.com* cell: +94 77 3320919 blog: **http://blog.afkham.org* http://blog.afkham.org* twitter: **http://twitter.com/afkham_azeez*http://twitter.com/afkham_azeez * linked-in: **http://lk.linkedin.com/in/afkhamazeez* * * *Lean . Enterprise . Middleware* * *
Automated installer for war files
All, I have been reading Continuous Integration: Improving Software Quality and Reducing Risk. It recommends having an automated installer for all deployments, so that the everything is the same on all environments. We typically have multiple instances of tomcat, allowing us to segregate applications and start|stop instances in isolation. We currently set this up manually, but I am trying to work out if we could create an automated deployment tool such that at deployment it would - Check for existing installation - if one found - shutdown existing service - remove existing service - remove existing tomcat instance - deploy new war, along with appropriate configuration files - register service - startup service To be clear, the script could assume that tomcat was already installed - say drop out if no CATALINA_HOME env variable set. I planned to feed it a property file with username/password/db connection string, so we could take the same installer and run on multiple environments without compromising the security of passwords etc. I can't seem to find anything included in tomcat to do this. So is the expected method of deployment to manually configure multiple tomcat instances, and then just deploy the war by hand/script? Am I missing some key piece of software/knowledge? I was looking at writing a script in say NSIS or something similar. Anybody have any experience of this, or suggest a better way of doing it? Thanks for any help Chris
Re: Automated installer for war files
chris derham wrote: .. - Check for existing installation - if one found - shutdown existing service - remove existing service - remove existing tomcat instance - deploy new war, along with appropriate configuration files - register service - startup service I do not presume to understand exactly what your requirements are, but if you are talking about deploying/redeploying /tomcat applications/, it seems a bit drastic to remove the whole tomcat instance just for deploying a new war. The Tomcat Manager interface provides a programmatic way to stop an application within a running Tomcat instance, replace the application, and restart it, all of that without need to even stop the Tomcat instance. At one level above, you can also stop a Tomcat instance (under Windows, probably a Service), without having to de-register and re-register the Service. And so on : you can also update the Tomcat software without necessarily updating the Java JVM, and you can update the Java JVM without necessarily having to reboot the system, etc.. Maybe you should be more precise as to what exactly you want to be able to update mechanically. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Automated installer for war files
Maybe you should be more precise as to what exactly you want to be able to update mechanically. Fair question. We have different environments - test, uat and prod. We want the environments to be the same. We install multiple tomcat instances, so we don't typically customize the tomcat install much - just add the jdbc jars to lib folder. Then each environment has a tomcat instance containing the war, and a context file. The context file we change a little - typically we replace the start with this (currently using tomcat 6.0.32) Context disableURLRewriting=true useHttpOnly=true privileged=false allowLinking=false crossContext=false !-- Default set of monitored resources -- WatchedResourceWEB-INF/web.xml/WatchedResource !-- Uncomment this to disable session persistence across Tomcat restarts -- Manager pathname= randomClass=java.security.SecureRandom / Then we would add entries for resources, such as smtp and jdbc and some entries to configure the app, e.g. so extra logging on test server, and turning off access to test urls on production. So our intention was to automate this all, except the initial installation of tomcat. So when we have a new war ready to deploy, our automated build process makes the war and makes an installer. We could then take that installer, invoke it on the target environment. If first install, then it would setup the service etc. If just an update, then I figured it would be safer to remove service. That way if we make any tweaks to the service configuration, they would be propagated to all environments. (currently we update the windows service to add a variable to tell the app which environment it is running under) Apologies if nobody else is doing this - I truly assumed that this would be a common need. I was aware of the manager app, and knew that you could call ant tasks to deploy new apps to it. However I didn't think that the tasks that it has would cover the whole range of installing a service etc I also agree with your comment about reinstalling the whole service seems overkill to just deploy an updated war file. However without the ability to deploy all the settings automatically via a script, I can't see how we can guarantee that all environments are the same. Working on multiple projects, it is just hard to keep all envs in sync all the time manually IMHO Thanks for your suggestion Chris
Re: Automated installer for war files
chris derham wrote: ... safer to remove service. That way if we make any tweaks to the service configuration, they would be propagated to all environments. (currently we update the windows service to add a variable to tell the app which environment it is running under) Can you expand a bit on the above ? (That seems to be the only part which is really Windows-specific). Such as, what variable are you talking about, defined where ? One other thing : it seems that when you talk about tomcat instances, you are really talking about nn separate installations of Tomcat, each with its own top installation directory, and each with its /bin, /lib, etc.. sub-directories. Is that how your setup is ? Or do you have one single Tomcat software directory (%CATALINA_HOME%), shared by multiple running Tomcat processes (each with its separate %CATALINA_BASE%) ? - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Tomcat 6 - Multiple JMX Remote Lifecycle Listeners
Hi, On 16 February 2011 11:18, Brett Delle Grazie brett.dellegra...@gmail.com wrote: Hi, I'm running Tomcat 6.0.23 and Sun Java 1.6.0.22 on RHEL 5.6 x86_64. I've currently got one JMX Remote Lifecycle listener configured in server.xml: Listener className=org.apache.catalina.mbeans.JmxRemoteLifecycleListener rmiRegistryPortPlatform=X rmiServerPortPlatform=X+1 useLocalPorts=true / !-- For SSH Tunnelling -- We use this to connect JConsole to the system via an SSH tunnel. However I have a local system on the same lan that I would now like to use. Can I add another listener with different ports (and no useLocalPorts=true) or should I use rmiRegistryPort as the same or should I avoid having two of these listeners at all. Experimentation says 'yes' it does work with different ports. I haven't tried it using the same RMI registry port. Thanks, -- Best Regards, Brett Delle Grazie -- Best Regards, Brett Delle Grazie - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chuck, On 2/15/2011 5:57 PM, Caldarale, Charles R wrote: From: Christopher Schultz [mailto:ch...@christopherschultz.net] Subject: [OT] OutOfMemoryError: GC overhead limit exceeded This error occurred /once/ at 16:39 EDT and it's 17:39 EDT now Is it likely that this was something acute and that my server is okay? PS Old Generation capacity = 134217728 (128.0MB) used = 129355080 (123.36261749267578MB) free = 4862648 (4.637382507324219MB) 96.37704491615295% used The above shows that the problem persists, even though at least some work is getting done. With multiple cores available, you may be able to get away with a saturated heap for a while, but a server restart is in order at your earliest convenience. But before doing that, try running jhat or equivalent to find out what's eating up the space. It seems that jmap won't do anything (like -histo) besides the heap map without using the -F switch. When I use the -F switch, the whole JVM pauses while it does the heap walk. I killed the jmap process and everything continued. I'll have to wait until off-hours to take it's temperature and bounce the server. On the other hand, I've invoked System.gc which ran quickly and freed up a lot of memory. Here's what jmap reports this morning: Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 201326592 (192.0MB) NewSize = 1048576 (1.0MB) MaxNewSize = 4294901760 (4095.9375MB) OldSize = 4194304 (4.0MB) NewRatio = 2 SurvivorRatio= 8 PermSize = 16777216 (16.0MB) MaxPermSize = 67108864 (64.0MB) Heap Usage: PS Young Generation Eden Space: capacity = 54263808 (51.75MB) used = 35766400 (34.1094970703125MB) free = 18497408 (17.6405029296875MB) 65.9120716334541% used - From Space: capacity = 6094848 (5.8125MB) used = 5233120 (4.990692138671875MB) free = 861728 (0.821807861328125MB) 85.86137012768818% used To Space: capacity = 6422528 (6.125MB) used = 0 (0.0MB) free = 6422528 (6.125MB) 0.0% used PS Old Generation capacity = 134217728 (128.0MB) used = 61911720 (59.043617248535156MB) free = 72306008 (68.95638275146484MB) 46.12782597541809% used PS Perm Generation capacity = 20578304 (19.625MB) used = 20152712 (19.21912384033203MB) free = 425592 (0.40587615966796875MB) 97.93184122462182% used Looks like I've got a lot more wiggle room, now, in the Old generation. Does this look healthy enough to continue, or should I schedule a restart ASAP? I'd prefer to wait until off hours. We do have a couple of operations that foolishly load way too much information into memory all at once and cache it in the session (oops), so I suspect one (or more) of those operations was performed and the objects were reachable for a while (lived in the session, probably) but then eventually became collectible and GC recovered. Quick question: does anyone know if it's safe to truncate catalina.out while Tomcat is running? Something like this: cp catalina.out catalina.out.old catalina.out ?? I'd like to stop getting my the sky is falling emails that are triggered by the presence of the string OutOfMemoryError in catalina.out :) Thanks, - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1b9BcACgkQ9CaO5/Lv0PAFAACbB0afje/4WLCjgE49UnkbpWG6 OmMAoIMei7iQFVZTzZhIDcnb80W0HI8K =yPoC -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Automated installer for war files
Can you expand a bit on the above ? (That seems to be the only part which is really Windows-specific). Such as, what variable are you talking about, defined where ? So currently we set catalina_home and catalina_base, cd into catalina_home\bin and run service install myApp then manually run tomcat6w //ES//myApp And under the java tab, manually append to the java options -Denv=uat for example. I think that this can be scripted using tomcat6w, e.g. something like tomcat6w //IS//myApp --JvmOptions -Denv=uat --Startup=auto I wrote the email to just try to ascertain which way is the most popular/best way to perform this One other thing : it seems that when you talk about tomcat instances, you are really talking about nn separate installations of Tomcat, each with its own top installation directory, and each with its /bin, /lib, etc.. sub-directories. Is that how your setup is ? Or do you have one single Tomcat software directory (%CATALINA_HOME%), shared by multiple running Tomcat processes (each with its separate %CATALINA_BASE%) ? When I said tomcat instances, I meant single catalina_home with multiple catalina_bases. I can see that this is ambiguous - I don't know if there is a better term that you guys use for this, as opposed to multiple catalina_homes? Thanks Chris
Re: Replicate session-object after values in object has been changed
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Martin, On 2/15/2011 3:46 PM, Martin Grotzke wrote: This is how it's implemented for memcached-session-manager (msm): when loading the session from memcached (either due to a tomcat failover or when loading a non-sticky session) the hash of the byte-array is stored. At the end of the request the session is serialized again and the new hash is compared with the previous one. Serialization is pluggable, default is java/jvm serialization, alternatives are e.g. kryo, which shares the same serialization semantics like java serialization (ignoring transient fields etc.). Okay, so you *do* take data fingerprints. How well does that perform? I suppose the balance of being able to replicate the objects with very little in the way of /coding/ overhead has its advantaged, but that seems like a lot of work to do after every request just to see if replication is necessary. For msm by default a session would get replicated if at least one attribute was accessed (via getAttribute), so I see this change detection (or detection that state has not changed) as some kind of optimization to reduce I/O and network traffic. Do you re-replicate the entire session or just the object that was accessed? Or, are you saying that you only re-fingerprint the objects that are accessed during a particular request? It would be really easy to disable this automatic change detection via configuration btw. All of these techniques will kill performance. :( Well, what does this mean? IMHO such statements are not really useful. Serializing objects after a request is complete delays the return of the request processing thread to the thread pool. More threads will be required to handle a particular user load and performance across the webapp will suffer. Is that more specific and useful? My assertion is that object changes are more easily detectable (or, better yet, /knowable/) by the webapp itself and it's trivial to notify the replication manager that an object needs to be re-replicated using HttpSession.setAttribute. I can share some facts + numbers (out of my head): - for one of the largest german ecommerce sites we use msm for session replication/failover - wicket is used as web framework, wicket stores entire pagemap (pages/component trees) in the session (for stateful pages) - kryo is used as serialization mechanism (see http://code.google.com/p/kryo/ and https://github.com/eishay/jvm-serializers/wiki). - average (serialized) session size is between 10kB and 100kB - session serialization/replication is done asynchronously (not in the request thread) That's interesting. Is there one thread that manages all replication? Under load, does it ever fall behind? I can imagine a work queue getting longer with each request... - overhead for msm in the request thread is ~1msec - average session serialization time is s.th. between 1msec and 10msec - ~20 requests per second are served by each tomcat instance In conclusion there's not a real impact on user experience. Most of the cpu time is used by the application, the overhead for serialization/replication is very low. I would think this would be very application-specific: of course a light session or trivially-serialized session-stored objects will not incur much of a penalty. Although, it has an impact on your application, as either you'll always trigger replication, or in several places in your software you need to know if you change session state and you have to decide if you need to set the appropriate session attribute. Even more, you need to know which session attribute you need to set again. My argument is that the webapp knows it's own business :) Some modern web frameworks try to provide a higher level of abstraction so that you don't get in touch with servlet stuff. If you need to trigger session replication via setAttribute in your application you need to know about internals of the web framework, which also might change. That was also my motivation to provide a transparent session change detection. That's a fair point. I am very interested in how the memcache folks accomplish this. Martin: is this done via careful configuration of what changed means or is everything automatic? I hope I could clarify how it's done for msm. Thanks for the details. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1b9oIACgkQ9CaO5/Lv0PD+jQCfSeKNoJGNNhS7mk/tuUOXNHEf YR4AoKy2jygC/u/wB1oGdUQZzbpSBre6 =Yrru -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Struts application used as a web service (large number of sessions)
Ok thanks, your explanations were very useful. I'll do what you suggested, i.e. not create a session for the Struts actions matching the web service clients. -- DL André Warnier a...@ice-sa.com 2011-02-15 06:02 PM Please respond to Tomcat Users List users@tomcat.apache.org To Tomcat Users List users@tomcat.apache.org cc Subject Re: Struts application used as a web service (large number of sessions) denis.laro...@pwc.ca wrote: Hello everybody, I wrote a Struts application deployed on a Tomcat server that is used as a web service. What I see is that for every request sent by the client applications a new session is created; I guess this is because there's no JSESSIONID cookie sent with the request. Could someone tell me if it's terribly inefficient for the server to have to create a new session for every request? I could reduce the session timeout to the minimum, but the application is also used by interactive users so the session timeout needs to have a reasonable value. HttpSession (HttpRequest.)getSession() : Returns the current session associated with this request, or if the request does not have a session, creates one. HttpSession : http://tomcat.apache.org/tomcat-5.5-doc/servletapi/javax/servlet/http/HttpSession.html A session is created when there is a call to getSession(). No call to getSession(), no session. In the big scheme of things, from the above descriptions, I would tend to think that a session object is not something trivial, so creating one when you don't need it is probably indeed quite inefficient. (And then the session has to be stored somewhere, which will involve serialization, I/O etc..; and then some background task still has to periodically go clean up these useless sessions). From your description, it seems as if there are two types of usage of the same application : - a usage by real users, which does require a session - a usage as a web service, which does not require a session (because these are one-off calls, probably) I don't know Struts at all, but is it possible to distinguish the two types of usage, and bypass the getSession() call when the application is used as a web service ? Otherwise, would it be possible to set up two instances of your application ? Such as : /webapp1 : used by interactive users /webapp2 : used by web service clients and remove the getSession() call in the one used as a web service ? Now again, inefficiency is a relative concept. If your server is 50% idle anyway, you do not really want to spend a lot of time bringing it to 60% idle. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: [OT] OutOfMemoryError: GC overhead limit exceeded
From: Christopher Schultz [mailto:ch...@christopherschultz.net] Subject: Re: [OT] OutOfMemoryError: GC overhead limit exceeded Here's what jmap reports this morning: PS Old Generation capacity = 134217728 (128.0MB) used = 61911720 (59.043617248535156MB) free = 72306008 (68.95638275146484MB) 46.12782597541809% used Interesting. Something must have broken loose overnight. Does this look healthy enough to continue, or should I schedule a restart ASAP? I'd let it run, and see what happens. I suspect one (or more) of those operations was performed and the objects were reachable for a while (lived in the session, probably) but then eventually became collectible and GC recovered. Sounds highly plausible. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
On Wed, Feb 16, 2011 at 5:37 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Christopher Schultz [mailto:ch...@christopherschultz.net] Subject: Re: [OT] OutOfMemoryError: GC overhead limit exceeded Here's what jmap reports this morning: PS Old Generation capacity = 134217728 (128.0MB) used = 61911720 (59.043617248535156MB) free = 72306008 (68.95638275146484MB) 46.12782597541809% used Interesting. Something must have broken loose overnight. Does this look healthy enough to continue, or should I schedule a restart ASAP? I'd let it run, and see what happens. I suspect one (or more) of those operations was performed and the objects were reachable for a while (lived in the session, probably) but then eventually became collectible and GC recovered. Sounds highly plausible. Do you log number of users/sessions? Would probably be interesting to see this in correlation. Leon - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Leon, On 2/16/2011 11:53 AM, Leon Rosenberg wrote: On Wed, Feb 16, 2011 at 5:37 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Christopher Schultz [mailto:ch...@christopherschultz.net] Subject: Re: [OT] OutOfMemoryError: GC overhead limit exceeded Here's what jmap reports this morning: PS Old Generation capacity = 134217728 (128.0MB) used = 61911720 (59.043617248535156MB) free = 72306008 (68.95638275146484MB) 46.12782597541809% used Interesting. Something must have broken loose overnight. Does this look healthy enough to continue, or should I schedule a restart ASAP? I'd let it run, and see what happens. I suspect one (or more) of those operations was performed and the objects were reachable for a while (lived in the session, probably) but then eventually became collectible and GC recovered. Sounds highly plausible. Do you log number of users/sessions? Would probably be interesting to see this in correlation. Not currently. We're working on some decent instrumentation tools to basically log all kinds of stuff like this on a regular interval... say every minute or five minutes. I could connect to the JVM using JConsole and ask Tomcat for the session count (all users have a session) but the event is long gone so any information I get now would not be directly relevant. Thanks, - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1cBnUACgkQ9CaO5/Lv0PCJRwCgo+ssFInOJ53tJQrO1ZdNhFPk UW0An1sKMuCkckA8Rjwzu23xM0CmxOAY =jBKF -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Chuck, On 2/16/2011 11:37 AM, Caldarale, Charles R wrote: From: Christopher Schultz [mailto:ch...@christopherschultz.net] Subject: Re: [OT] OutOfMemoryError: GC overhead limit exceeded Here's what jmap reports this morning: PS Old Generation capacity = 134217728 (128.0MB) used = 61911720 (59.043617248535156MB) free = 72306008 (68.95638275146484MB) 46.12782597541809% used Interesting. Something must have broken loose overnight. Definitely. It may have broken loose much earlier... I just didn't observe it again after my initial post last night. Does this look healthy enough to continue, or should I schedule a restart ASAP? I'd let it run, and see what happens. :) Should I be concerned that neither jstack not jmap will run against the JVM unless I specify the -F switch? Thanks, - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1cBq8ACgkQ9CaO5/Lv0PAxYQCfTQdvZfmMjdewR51Ma8G99mk2 Y34AoJ1RLeEXytG/3zxC2IVH+GXqcWq/ =JXzi -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Performance Tuning Tomcat 7...
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Pid, On 2/15/2011 2:43 PM, Pid wrote: On 2/15/11 2:34 PM, Christopher Schultz wrote: Pid, On 2/14/2011 5:39 AM, Pid wrote: On 2/13/11 8:15 PM, Tony Anecito wrote: Hi Mark, Here is the link to the screenshot I tried to send as an attachement. http://www.myuniportal.com/tomcatjerseyservletprofile.jpg What are we looking for here? I don't know if there's any optimisation possible in the SocketProcessor.run() method in Tomcat. If I were to consider what Jersey is doing, I'd look at why there's an expensive ContainerResponse.write() call (costing 0.6ms) while it still seems to be processing the request. ... and a recursive call to _handleRequest. Or am I reading that incorrectly Could be, or there could be more than one _handleRequest method with different args. /guessing Duh. Didn't think of that. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1cCJEACgkQ9CaO5/Lv0PCTQQCePKndmJbVkBsW7O17DFrlbbXU A/AAn0+iP1nxUqL3evB9r8cY/vY9zw61 =tlpV -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Tomcat 7.0.8 JARs in Maven repos
Hi folks, Can I know from which Maven repo I can fetch the JARs of the latest Tomcat release? repo1 seems to be having only upto the 7.0.6 JARs. Thanks Azeez
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
Op woensdag, 16 februari 2011 18:17 schreef Christopher Schultz ch...@christopherschultz.net: Chuck, On 2/16/2011 11:37 AM, Caldarale, Charles R wrote: From: Christopher Schultz [mailto:ch...@christopherschultz.net] Subject: Re: [OT] OutOfMemoryError: GC overhead limit exceeded Here's what jmap reports this morning: PS Old Generation capacity = 134217728 (128.0MB) used = 61911720 (59.043617248535156MB) free = 72306008 (68.95638275146484MB) 46.12782597541809% used Interesting. Something must have broken loose overnight. Definitely. It may have broken loose much earlier... I just didn't observe it again after my initial post last night. Does this look healthy enough to continue, or should I schedule a restart ASAP? I'd let it run, and see what happens. :) Should I be concerned that neither jstack not jmap will run against the JVM unless I specify the -F switch? Thanks, - -chris I see the same problem with jstack and friends if a process is gc'ing a lot. Ronald.
Re: Tomcat 7.0.8 JARs in Maven repos
On 16/02/2011 17:46, Afkham Azeez wrote: Hi folks, Can I know from which Maven repo I can fetch the JARs of the latest Tomcat release? repo1 seems to be having only upto the 7.0.6 JARs. Search the archives. That question was asked and answered a couple of days ago. Mark - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ronald, On 2/16/2011 12:48 PM, Ronald Klop wrote: I see the same problem with jstack and friends if a process is gc'ing a lot. Interesting. I don't have verbose GC enabled (can you enable that after JVM launch using JConsole or something like that?), but the process doesn't seem to be using a ton of CPU time which I would expect from a very active GC. Do you observe this only when GC is /currently/ active or after there has been a lot of GC activity. I'm wondering if the JVM is in a state where everything is working properly except that one small things has broken and prevents these tools from working without sprinkling the force magic onto them. Thanks, - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1cFPkACgkQ9CaO5/Lv0PB9fACfblGqULi4gJNnOD+PdvWAKlz+ 2hkAn2kWKXb+FZiVatOM/TaL3BCOGam2 =rECB -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Replicate session-object after values in object has been changed
On 2/15/2011 1:04 PM, Thomas Andraschko wrote: Hmm not really but the tcp cluster with BackupManager would be enough (if it would check for modification). That can be easy, or hard :) If you know how to check for modification, then you can implement a simple filter that adds the attribute again best Filip The memcached manager is really a great idea and works great! I have only one issue. If you shutdown a memcached node, JSF pages can not be accessed anymore (a blank page will appear) and connection refused exceptions will be printed by tomcat. --- Martin Grotzkemartin.grot...@googlemail.com schrieb am Di, 15.2.2011: Von: Martin Grotzkemartin.grot...@googlemail.com Betreff: Re: Replicate session-object after values in object has been changed An: Tomcat Users Listusers@tomcat.apache.org Datum: Dienstag, 15. Februar, 2011 20:49 Uhr On Tue, Feb 15, 2011 at 11:08 AM, Thomas Andraschko tommygrass...@yahoo.de wrote: Thanks! i will give it a try! Is there also another manager available without using memcached? None that I'm aware of, but perhaps google will know more ;-) What do you have in mind btw? Is it especially memcached that you would like to have replaced by another backend? Cheers, Martin --- Martin Grotzkemartin.grot...@googlemail.com schrieb am Di, 15.2.2011: Von: Martin Grotzkemartin.grot...@googlemail.com Betreff: Re: Replicate session-object after values in object has been changed An: us...@tomcat.apache..org Datum: Dienstag, 15. Februar, 2011 01:27 Uhr memcached-session-manager detects session modification as you describe it. It's a custom session manager that keeps sessions (additionally) in memcached: http:// code.google.com/p/memcached-session-manager Cheers, Martin Thomas Andraschko wrote: Thanks for your answer. Yep that works but it isn't really nice if you are working with managed beans from JSF or other DI containers. Does other Servlet containers support this kind of replication or is it really the only way to put/remove the object to/from the session map? It is possible to develop a valve or interceptor to check specified entries in the session map and replicate them again? (sorry, i don't know the architecture very well) --- Mark Thomasma...@apache..org schrieb am Mo, 14.2.2011: Von: Mark Thomasma...@apache.org Betreff: Re: Replicate session-object after values in object has been changed An: Tomcat Users Listusers@tomcat.apache.org Datum: Montag, 14. Februar, 2011 19:09 Uhr On 14/02/2011 15:57, Thomas Andraschko wrote: Is it possible that Tomcat will automatically check the SessionMap entries after each request if any value in a entry has been changed? No. Tomcat adding or removing an object from the session will trigger replication. Modifying the object directly will not trigger replication. You can try re-adding the object to the session. That should trigger replication. Mark - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache..org For additional commands, e-mail: users-h...@tomcat.apache.org -- View this message in context: http://old.nabble.com/Replicate-session-object-after-values-in-object-has-been-changed-tp30923039p30927143.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org -- Martin Grotzke http://www.javakaffee.de/blog/ - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1204 / Virus Database: 1435/3445 - Release Date: 02/15/11 - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
hi
Hi, How can i configure my localhost:8080 tomcat so that the site could be accessible through ip address by other computers in the network. Sincerely, Anup
Re: hi
Well, Actually tomcat comes configured on port 8080. You just need to start it and make sure you dont have any firewall in your server blocking this port. Thats it. Best! Özgür Özdemircili http://www.acikkod.org Code so clean you could eat off it On Wed, Feb 16, 2011 at 7:42 PM, Anup Niroula anup.niro...@gmail.comwrote: Hi, How can i configure my localhost:8080 tomcat so that the site could be accessible through ip address by other computers in the network. Sincerely, Anup
RE: hi
From: Anup Niroula [mailto:anup.niro...@gmail.com] Subject: hi How can i configure my localhost:8080 tomcat so that the site could be accessible through ip address by other computers in the network. Assuming there are no firewalls in the way, you already have. The other computers would access your site via: http://your_ip_address:8080 Nothing else is needed. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Automated installer for war files
chris derham wrote: Can you expand a bit on the above ? (That seems to be the only part which is really Windows-specific). Such as, what variable are you talking about, defined where ? So currently we set catalina_home and catalina_base, cd into catalina_home\bin and run service install myApp then manually run tomcat6w //ES//myApp And under the java tab, manually append to the java options -Denv=uat for example. I think that this can be scripted using tomcat6w, e.g. something like tomcat6w //IS//myApp --JvmOptions -Denv=uat --Startup=auto I wrote the email to just try to ascertain which way is the most popular/best way to perform this One other thing : it seems that when you talk about tomcat instances, you are really talking about nn separate installations of Tomcat, each with its own top installation directory, and each with its /bin, /lib, etc.. sub-directories. Is that how your setup is ? Or do you have one single Tomcat software directory (%CATALINA_HOME%), shared by multiple running Tomcat processes (each with its separate %CATALINA_BASE%) ? When I said tomcat instances, I meant single catalina_home with multiple catalina_bases. I can see that this is ambiguous - I don't know if there is a better term that you guys use for this, as opposed to multiple catalina_homes? No, you are right, that was the right term. I just had a doubt, but you are doing this correctly. One more question: Above, you mention myApp as the name of the Service. I guess that you mean also myApp1, myApp2, ... (as many different services as you have Tomcat instances), right ? I don't think that there is a commonly accepted or used way of doing this kind of thing. Personally, it looks to me like you are doing this in a sensible way, considering. Others may have a better idea. The only thing for me is : it looks as if the only Service setup value which is different from one Tomcat to the other, is this -Denv=uat flag. I presume that this is something picked up later by the application. If you could move this somewhere else (such as in the application's context.xml, or an init-param in the webapp's web.xml), and have the application picking it up from there, then it seems to me that this would alleviate the need of manipulating the Service's Registry parameters altogether, no ? (and consequently also the need for stopping, re-registering and restarting the Service) - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: hi
Hi, Thanx for the reply. Is there any way i can provide domain namewww.abc.cominstead of ip address to be accessed with in network. ? Sincerely, Anup On Wed, Feb 16, 2011 at 12:48 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Anup Niroula [mailto:anup.niro...@gmail.com] Subject: hi How can i configure my localhost:8080 tomcat so that the site could be accessible through ip address by other computers in the network. Assuming there are no firewalls in the way, you already have. The other computers would access your site via: http://your_ip_address:8080 Nothing else is needed. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: hi
On 2/16/2011 2:04 PM, Anup Niroula wrote: Hi, Thanx for the reply. Is there any way i can provide domain namewww.abc.cominstead of ip address to be accessed with in network. ? If your internal dns server will resolve it to the correct ip address, it will work. Sincerely, Anup On Wed, Feb 16, 2011 at 12:48 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Anup Niroula [mailto:anup.niro...@gmail.com] Subject: hi How can i configure my localhost:8080 tomcat so that the site could be accessible through ip address by other computers in the network. Assuming there are no firewalls in the way, you already have. The other computers would access your site via: http://your_ip_address:8080 Nothing else is needed. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Tomcat 7.0.8 maven repository
On 14/02/2011 21:47, George Vagenas wrote: Thanks Mark My bad. There was an incorrect version in a config file. 7.0.8 files have been uploaded and should sync shortly. Mark On Sun, Feb 13, 2011 at 12:32 PM, George Vagenas gvage...@gmail.com wrote: Hi guys, I am trying to locate the tomcat 7.0.8 artifacts with no success. I tried http://repo2.maven.org/maven2/org/apache/tomcat/ but no luck there. Can you please shed some light here? Regards -- George Vagenas - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
Op woensdag, 16 februari 2011 19:18 schreef Christopher Schultz ch...@christopherschultz.net: Ronald, On 2/16/2011 12:48 PM, Ronald Klop wrote: I see the same problem with jstack and friends if a process is gc'ing a lot. Interesting. I don't have verbose GC enabled (can you enable that after JVM launch using JConsole or something like that?), but the process doesn't seem to be using a ton of CPU time which I would expect from a very active GC. Do you observe this only when GC is /currently/ active or after there has been a lot of GC activity. I'm wondering if the JVM is in a state where everything is working properly except that one small things has broken and prevents these tools from working without sprinkling the force magic onto them. Thanks, - -chris Where it is /currently/ active. I don't do much jstack/jmap if there is no problem, so can't really say something about it. Ronald.
Re: hi
Hi, could you please explain me in detail. How can i provide a domain name for my website like www.lsctesting.com using tomcat 7 to be accessed in the network. Sincerely, Anup On Wed, Feb 16, 2011 at 1:07 PM, David kerber dcker...@verizon.net wrote: On 2/16/2011 2:04 PM, Anup Niroula wrote: Hi, Thanx for the reply. Is there any way i can provide domain namewww.abc.cominstead of ip address to be accessed with in network. ? If your internal dns server will resolve it to the correct ip address, it will work. Sincerely, Anup On Wed, Feb 16, 2011 at 12:48 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Anup Niroula [mailto:anup.niro...@gmail.com] Subject: hi How can i configure my localhost:8080 tomcat so that the site could be accessible through ip address by other computers in the network. Assuming there are no firewalls in the way, you already have. The other computers would access your site via: http://your_ip_address:8080 Nothing else is needed. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: hi
From: Anup Niroula [mailto:anup.niro...@gmail.com] Subject: Re: hi Hi, could you please explain me in detail. How can i provide a domain name for my website like www.lsctesting.com using tomcat 7 to be accessed in the network. This has nothing to do with Tomcat. Contact your network administrator. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Replicate session-object after values in object has been changed
On Wed, Feb 16, 2011 at 5:08 PM, Christopher Schultz ch...@christopherschultz.net wrote: On 2/15/2011 3:46 PM, Martin Grotzke wrote: This is how it's implemented for memcached-session-manager (msm): when loading the session from memcached (either due to a tomcat failover or when loading a non-sticky session) the hash of the byte-array is stored. At the end of the request the session is serialized again and the new hash is compared with the previous one. Serialization is pluggable, default is java/jvm serialization, alternatives are e.g. kryo, which shares the same serialization semantics like java serialization (ignoring transient fields etc.). Okay, so you *do* take data fingerprints. How well does that perform? Serializing the session at the end of the request takes 1 to 10 millis. Actual hashing of some 10kB session data is in the order of 1 micro second. Storing the hash (int) - does not count. I suppose the balance of being able to replicate the objects with very little in the way of /coding/ overhead has its advantaged, but that seems like a lot of work to do after every request just to see if replication is necessary. A lot of work is relative. In our case more work is done for each request by the application (even without any I/O), so that serialization does not add anything that would be reflected by a higher load. For msm by default a session would get replicated if at least one attribute was accessed (via getAttribute), so I see this change detection (or detection that state has not changed) as some kind of optimization to reduce I/O and network traffic. Do you re-replicate the entire session or just the object that was accessed? Or, are you saying that you only re-fingerprint the objects that are accessed during a particular request? As msm was started from a wicket app that has exactly one session attribute the entire session is replicated. But it would also be possible to break it up into separately stored session attributes. Only one thing has to be considered with this: objects shared by different session attributes would be deserialized as different objects (not references to the same object), which might break behaviour if this is not considered. Serializing the entire session ensures that references to shared objects are also deserialized correctly. All of these techniques will kill performance. :( Well, what does this mean? IMHO such statements are not really useful. Serializing objects after a request is complete delays the return of the request processing thread to the thread pool. More threads will be required to handle a particular user load and performance across the webapp will suffer. Is that more specific and useful? Request processing is delayed in the order of 1 milli second, I'd say it's not that much - unless an application handles around 1000 requests per second with an avg. request processing time in the order of 1 milli second. But this would be an interesting example for optimization ;-) My assertion is that object changes are more easily detectable (or, better yet, /knowable/) by the webapp itself and it's trivial to notify the replication manager that an object needs to be re-replicated using HttpSession.setAttribute. Of course there are applications working directly with session attributes, but there are also others where it's not clear which session attibute is responsible for a currently modified object (or even if it's bound to the session). It depends on the application architecture. I can share some facts + numbers (out of my head): - for one of the largest german ecommerce sites we use msm for session replication/failover - wicket is used as web framework, wicket stores entire pagemap (pages/component trees) in the session (for stateful pages) - kryo is used as serialization mechanism (see http://code.google.com/p/kryo/ and https://github.com/eishay/jvm-serializers/wiki). - average (serialized) session size is between 10kB and 100kB - session serialization/replication is done asynchronously (not in the request thread) That's interesting. Is there one thread that manages all replication? The number of available processors is used by default (Runtime.availableProcessors()), but you can override this via configuration. Under load, does it ever fall behind? I can imagine a work queue getting longer with each request... We didn't experience such a behaviour in the last 6 months, also not during peak load. - overhead for msm in the request thread is ~1msec - average session serialization time is s.th. between 1msec and 10msec - ~20 requests per second are served by each tomcat instance In conclusion there's not a real impact on user experience. Most of the cpu time is used by the application, the overhead for serialization/replication is very low. I would think this would be very application-specific: of course a light session or trivially-serialized session-stored objects will not incur
Tomcat 6.0.20/AJP connector issues - errors in apache log
*Basics:* Tomcat 6.0.20 (5 instances) Apache 2.2.13 using mod_proxy_ajp to connect to the tomcat instances Dell Poweredge 1950 running Fedora Core We're noticing that we frequently have a buildup in the morning of AJP errors in our apache error_log along the following lines: *[Wed Feb 16 04:43:35 2011] [error] ajp_read_header: ajp_ilink_receive failed [Wed Feb 16 04:43:35 2011] [error] (120006)APR does not understand this error code: proxy: read response failed from (null) (127.0.0.1) [Wed Feb 16 04:45:23 2011] [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header [Wed Feb 16 04:45:23 2011] [error] ajp_read_header: ajp_ilink_receive failed [Wed Feb 16 04:45:23 2011] [error] (120006)APR does not understand this error code: proxy: read response failed from (null) (127.0.0.1) [Wed Feb 16 04:45:23 2011] [error] [client hidden] proxy: error processing end [Wed Feb 16 04:47:44 2011] [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header [Wed Feb 16 04:47:44 2011] [error] ajp_read_header: ajp_ilink_receive failed [Wed Feb 16 04:47:44 2011] [error] (120006)APR does not understand this error code: proxy: read response failed from (null) (127.0.0.1) [Wed Feb 16 04:52:06 2011] [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header [Wed Feb 16 04:52:06 2011] [error] ajp_read_header: ajp_ilink_receive failed [Wed Feb 16 04:52:06 2011] [error] (120006)APR does not understand this error code: proxy: read response failed from (null) (127.0.0.1) [Wed Feb 16 04:54:34 2011] [error] (70007)The timeout specified has expired: ajp_ilink_receive() can't receive header* I'm trying to get a handle on what's going on here and how to fix it. I've not yet found anything in the tomcat logs of concern. Can anyone give me some idea of what's going on or how to remedy it? Not really sure what the next step in troubleshooting is at this point. Thanks all for your help, Shaun
Re: huge info messages about mod_jk
Mr.Schultz
Here's my Apache, mod_jk and JBoss(Tomcat) configurations.
I think it seems the same setting between MaxClients and maxThreads,
and they have no problems about the Timeout settings.
Would you find any mistakes in these files?
[httpd.conf](preforkMPM)
MaxClients 81
Listen 8008
Listen 8010
Listen 8011
NameVirtualHost XXX.XXX.XXX.162:8008
NameVirtualHost XXX.XXX.XXX.162:8010
NameVirtualHost XXX.XXX.XXX.162:8011
:
VirtualHost XXX.XXX.XXX.162:8008
CustomLog /opt/httpd/logs/access_8008_log common
ErrorLog /opt/httpd/logs/error_8008_log
JkMount /sample/* worker01
/VirtualHost
VirtualHost XXX.XXX.XXX.162:8010
CustomLog /opt/httpd/logs/access_8010_log common
ErrorLog /opt/httpd/logs/error_8010_log
JkMount /sample/* worker01
/VirtualHost
VirtualHost 138.101.249.162:8011
RewriteEngine On
RewriteRule !^(/sample/limit\.do|/sample/alive3\.jsp|/index\.html)$ - [F]
CustomLog /opt/httpd/logs/access_8011_log common
ErrorLog /opt/httpd/logs/error_8011_log
JkMount /sample/* worker01
/VirtualHost
[workers.properties]
:
worker.worker01.type=ajp13
worker.worker01.host=XXX.XXX.XXX.162
worker.worker01.port=8009
worker.worker01.retries=2
worker.worker01.retry_interval=200
worker.worker01.recovery_options=0
worker.worker01.connection_pool_timeout=20
[server.xml]
Connector protocol=HTTP/1.1 port=8080 address=${jboss.bind.address}
maxThreads=81 connectionTimeout=2 redirectPort=8443
allowTrace=false /
Connector protocol=AJP/1.3 port=8009 address=${jboss.bind.address}
maxThreads=81 connectionTimeout=2 redirectPort=8443
allowTrace=false /
Best regards,
(2011/02/16 1:38), Christopher Schultz wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Mladen,
On 2/15/2011 8:51 AM, Mladen Turk wrote:
On 02/15/2011 01:08 PM, Yu Kikuchi wrote:
Mr.Warnier
Thank you for your advice.
But I want to know not the way to inhibit these logs but the reason
why these logs output.
Because Tomcat closes its part of the connection.
This could also be a mismatch between Apache httpd's MaxClients setting
and Tomcat's maxActive (or similar).
Kikuchi, Would you care to post yourConnector setting from Tomcat and
your MPM configuration from httpd?
When I restarted Apache, huge info messages were put out to the
mod_jk's log like following (over 200 lines!)
10 lines per day of info logging is huge? What must you think of your
access log?
- -chris
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.10 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
iEYEARECAAYFAk1aq+oACgkQ9CaO5/Lv0PBH4gCfTJh1P4XSZ9hOr+vkCkrgT0F/
jU0AoMA3sieFeUCVsIjOlTFZK4izSOX3
=rR2D
-END PGP SIGNATURE-
-
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
-
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Tomcat Secuirty Problem
Hi,
I am new to Tomcat server. I have installed Tomcat 6 and deployed a web
application. This application has to decrypt some files and store in a temp
folder. I have created a folder with name temp' in WEB-INF folder of my
applciation. But When I am running my application, at the time of
decryption, I am getting Access Denied exception. Through Tomcat security
features, I came to know that we need to grant the permission in
catalina.policy in conf folder. Below is the line I have added in it. But
still I am getting the same exception.
grant codeBase http://localhost:8080/lanwan/-; {
permission java.io.FilePermission C:\\Program Files\\Apache Software
Foundation\\Tomcat 6.0\\webapps\\lanwan\\WEB-INF\\docs\\temp\\-,
read,write,delete;
}
Please help me how to configure this security settings.
Thanks in advance,
Ramesh
Tomcat Security Problem
Hi,
I am new to Tomcat server. I have installed Tomcat 6 and deployed a web
application. This application has to decrypt some files and store in a temp
folder. I have created a folder with name temp' in WEB-INF folder of my
applciation. But When I am running my application, at the time of
decryption, I am getting Access Denied exception. Through Tomcat security
features, I came to know that we need to grant the permission in
catalina.policy in conf folder. Below is the line I have added in it. But
still I am getting the same exception.
grant codeBase http://localhost:8080/lanwan/-; {
permission java.io.FilePermission C:\\Program Files\\Apache Software
Foundation\\Tomcat 6.0\\webapps\\lanwan\\WEB-INF\\docs\\temp\\-,
read,write,delete;
}
Please help me how to configure this security settings.
Thanks in advance,
Ramesh
RE: Tomcat Secuirty Problem
From: jamana ramesh [mailto:ramesh.jam...@gmail.com] Subject: Re: Tomcat Secuirty Problem I am new to Tomcat server. And unaware of basic etiquette: 1) Don't cross-post. 2) Always provide the exact Tomcat version, JVM level, and OS you're running on. This application has to decrypt some files and store in a temp folder. I have created a folder with name temp' in WEB-INF folder of my applciation. That's a really, really bad idea - you should never try to write into the webapp's deployment directory. You have no guarantee that there even is a deployment directory, or even a file system. The servlet specification requires that the container (Tomcat, in this case) provide a scratch area for just this purpose. Read section 4.7.1 of the servlet spec, which states, in part: A temporary storage directory is required for each servlet context. Servlet containers must provide a private temporary directory for each servlet context, and make it available via the javax.servlet.context.tempdir context attribute. The objects associated with the attribute must be of type java.io.File. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] OutOfMemoryError: GC overhead limit exceeded
On Wed, Feb 16, 2011 at 6:16 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Leon, On 2/16/2011 11:53 AM, Leon Rosenberg wrote: On Wed, Feb 16, 2011 at 5:37 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Christopher Schultz [mailto:ch...@christopherschultz.net] Subject: Re: [OT] OutOfMemoryError: GC overhead limit exceeded Here's what jmap reports this morning: PS Old Generation capacity = 134217728 (128.0MB) used = 61911720 (59.043617248535156MB) free = 72306008 (68.95638275146484MB) 46.12782597541809% used Interesting. Something must have broken loose overnight. Does this look healthy enough to continue, or should I schedule a restart ASAP? I'd let it run, and see what happens. I suspect one (or more) of those operations was performed and the objects were reachable for a while (lived in the session, probably) but then eventually became collectible and GC recovered. Sounds highly plausible. Do you log number of users/sessions? Would probably be interesting to see this in correlation. Not currently. We're working on some decent instrumentation tools to basically log all kinds of stuff like this on a regular interval... say every minute or five minutes. I could connect to the JVM using JConsole and ask Tomcat for the session count (all users have a session) but the event is long gone so any information I get now would not be directly relevant. reinventing the wheel? :-) http://moskito.anotheria.net among others... best regards Leon Thanks, - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1cBnUACgkQ9CaO5/Lv0PCJRwCgo+ssFInOJ53tJQrO1ZdNhFPk UW0An1sKMuCkckA8Rjwzu23xM0CmxOAY =jBKF -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
error when tomcat is shutting down
/opt/apache-tomcat-5.5.31/bin/bootstrap.jar 2011-02-17 12:50:38,919 ERROR main org.apache.catalina.startup.Catalina - Catalina.stop: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) at java.net.Socket.connect(Socket.java:478) at java.net.Socket.init(Socket.java:375) at java.net.Socket.init(Socket.java:189) at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:395) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:344) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:435) I am getting above error. What does it mean? - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
