Configuring timeouts for apache + mod_jk + tomcat
Hello, I'm writing because at last we are about to upgrade the Apache httpd+mod_jk we use in the production environment from version 2.0.52 to version 2.2.14 (on Linux Servers), and I'd like to receive advice from you about timeout settings. For some reason I don't know, the system has the following *odd* configuration: * Apache Timeout directive is not used (I assume that it times out after the default 300 seconds) * mod_jk is configured with connection_pool_timeout=5 socket_timeout=5 (and it also has connection_pool_size=1) * Tomcat has its AJP connector configured to timeout after 30 milliseconds I believe that the mod_jk timeouts are a bit too low, especially if compared to the other ones. We are experiencing a strange behaviour with our current configuration, and I believe it may be related to the configuration settings: many Tomcat threads get stuck while flushing the output buffer (in particular when the system is under heavy load), as if there were no other thread on the Apache side to receive their input. Do you think it is reasonable to have timeout values that differ so much between mod_jk and Tomcat? I'd rather us a connection_pool_timeout that's comparable to the Apache timeout, especially because we need to get rid of anything that may cause our workers to behave in such a weird manner. Thank you for any help you can give. Regards, Alessandro PS this post is related to this thread: http://mail-archives.apache.org/mod_mbox/tomcat-users/200911.mbox/%3cce3aa0b60911180337o6469bdb4tcf3a90b44cea4...@mail.gmail.com%3 - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Performance issues when adding Tomcat JK redirector to IIS's Default Web Site?
Dear All I've tried googling this but can't find much, so I was hoping one of you guys might be able to help me. My web application lives under IIS's Default Web Site. It needs to use the Tomcat JK redirector, so I have added the redirector as an ISAPI Filter on the Default Web Site. This means any websites which live under the Default Web Site will use the redirector. This is fine, however, there are other third-party websites which live under IIS's Default Web Site, which means the change I made above (adding the redirector as an ISAPI Filter on the Default Web Site) also affects these third party websites. So my question is this: Are there any known performance issues with the Tomcat JK redirector, in particular, any performance issues which could affect the third-party websites as explained in my example above? Any advice appreciated. Cheers Steve
Re: Performance issues when adding Tomcat JK redirector to IIS's Default Web Site?
Steve, you're likely to get more specific answers if you can tell us versions: what version of the redirector, and what versions of IIS? Also, can you tell us whose instructions you followed to get it working, as there are some out there that are... how shall I say it... less than ideal :-). Cheers, - Peter On 15 February 2010 11:30, Steve Ryan st...@acme.ie wrote: Dear All I've tried googling this but can't find much, so I was hoping one of you guys might be able to help me. My web application lives under IIS's Default Web Site. It needs to use the Tomcat JK redirector, so I have added the redirector as an ISAPI Filter on the Default Web Site. This means any websites which live under the Default Web Site will use the redirector. This is fine, however, there are other third-party websites which live under IIS's Default Web Site, which means the change I made above (adding the redirector as an ISAPI Filter on the Default Web Site) also affects these third party websites. So my question is this: Are there any known performance issues with the Tomcat JK redirector, in particular, any performance issues which could affect the third-party websites as explained in my example above? Any advice appreciated. Cheers Steve - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Tomcat 6 is getting down
Tomcat is getting down automatically, after few seconds of starting it. Attached is the tomcat log. Could n't able to identify the issue. Please help me out. -- View this message in context: http://old.nabble.com/Tomcat-6-is-getting-down-tp27593280p27593280.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
RE: Performance issues when adding Tomcat JK redirector to IIS's Default Web Site?
Hi Peter Thanks for your reply. To answer your questions: I am using IIS 6 and IIS 7. I am using the latest version of the redirector, i.e. JK-1.2.28. Our technical architect decided how we should use the redirector. This is the basic design: IIS - Default Web Site (ISAPI Filter = isapi_redirect.dll) --- Virtual directory for our web application --- Virtual directory for the redirector --- Virtual directory for other third-party website IIS Application Pools - DefaultAppPool (may be used by Other third-party website) - AppPool for our web application - AppPool for the redirector So as you can see, all the virtual directories live under the Default Web Site. The isapi_redirect.dll is added as an ISAPI Filter for the entire Default Web Site, which means all the virtual directories under Default Web Site will be affected by this. My worry is it might impact Other third-party website. Thanks for your help. Cheers Steve -Original Message- From: peter.crowth...@googlemail.com [mailto:peter.crowth...@googlemail.com] On Behalf Of Peter Crowther Sent: 15 February 2010 11:47 To: Tomcat Users List Subject: Re: Performance issues when adding Tomcat JK redirector to IIS's Default Web Site? Steve, you're likely to get more specific answers if you can tell us versions: what version of the redirector, and what versions of IIS? Also, can you tell us whose instructions you followed to get it working, as there are some out there that are... how shall I say it... less than ideal :-). Cheers, - Peter On 15 February 2010 11:30, Steve Ryan st...@acme.ie wrote: Dear All I've tried googling this but can't find much, so I was hoping one of you guys might be able to help me. My web application lives under IIS's Default Web Site. It needs to use the Tomcat JK redirector, so I have added the redirector as an ISAPI Filter on the Default Web Site. This means any websites which live under the Default Web Site will use the redirector. This is fine, however, there are other third-party websites which live under IIS's Default Web Site, which means the change I made above (adding the redirector as an ISAPI Filter on the Default Web Site) also affects these third party websites. So my question is this: Are there any known performance issues with the Tomcat JK redirector, in particular, any performance issues which could affect the third-party websites as explained in my example above? Any advice appreciated. Cheers Steve - 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: Performance issues when adding Tomcat JK redirector to IIS's Default Web Site?
Apologies, for some reason the formatting of my e-mail get messed up. I have reformatted below: Hi Peter Thanks for your reply. To answer your questions: I am using IIS 6 and IIS 7. I am using the latest version of the redirector, i.e. JK-1.2.28. Our technical architect decided how we should use the redirector. This is the basic design: IIS - Default Web Site (ISAPI Filter = isapi_redirect.dll) --- Virtual directory for our web application --- Virtual directory for the redirector --- Virtual directory for other third-party website IIS Application Pools - DefaultAppPool (may be used by Other third-party website) - AppPool for our web application - AppPool for the redirector So as you can see, all the virtual directories live under the Default Web Site. The isapi_redirect.dll is added as an ISAPI Filter for the entire Default Web Site, which means all the virtual directories under Default Web Site will be affected by this. My worry is it might impact Other third-party website. Thanks for your help. Cheers Steve -Original Message- From: peter.crowth...@googlemail.com [mailto:peter.crowth...@googlemail.com] On Behalf Of Peter Crowther Sent: 15 February 2010 11:47 To: Tomcat Users List Subject: Re: Performance issues when adding Tomcat JK redirector to IIS's Default Web Site? Steve, you're likely to get more specific answers if you can tell us versions: what version of the redirector, and what versions of IIS? Also, can you tell us whose instructions you followed to get it working, as there are some out there that are... how shall I say it... less than ideal :-). Cheers, - Peter On 15 February 2010 11:30, Steve Ryan st...@acme.ie wrote: Dear All I've tried googling this but can't find much, so I was hoping one of you guys might be able to help me. My web application lives under IIS's Default Web Site. It needs to use the Tomcat JK redirector, so I have added the redirector as an ISAPI Filter on the Default Web Site. This means any websites which live under the Default Web Site will use the redirector. This is fine, however, there are other third-party websites which live under IIS's Default Web Site, which means the change I made above (adding the redirector as an ISAPI Filter on the Default Web Site) also affects these third party websites. So my question is this: Are there any known performance issues with the Tomcat JK redirector, in particular, any performance issues which could affect the third-party websites as explained in my example above? Any advice appreciated. Cheers Steve - 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 - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Xmx definition
I'm running apache tomcat version 5.5.23. my OS is CENTOS 5. I've used Runtime.getRuntime().getMaxMemory() to get an approximation of my Xmx. The figure I got was 842MB. Since this is not the default, and I've looked up in all possible scripts (including searching for the string 'Xmx' in the entire hard drive) and found no trace of an Xmx definition, I wonder were this number came from.
Re: Tomcat 6 is getting down
2010/2/15 vramanaj vrama...@gmail.com: Tomcat is getting down automatically, after few seconds of starting it. Attached is the tomcat log. Could n't able to identify the issue. Please help me out. This mailing list does not allow attachments. Either paste it as text, or put it elsewhere, e.g. use http://pastebin.com/ Also: 1) your exact Tomcat version = ? x.y.z 2) your operating system 3) step-by-step how you do starting it, etc, your configuration, .. Best regards, Konstantin Kolinko - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: Xmx definition
From: Amir Hadadi [mailto:ami...@correlix.com] Subject: Xmx definition I'm running apache tomcat version 5.5.23. my OS is CENTOS 5. Not relevant; what is relevant is the JVM version, which you didn't mention. I've used Runtime.getRuntime().getMaxMemory() to get an approximation of my Xmx. The figure I got was 842MB. I wonder were this number came from. To quote from the Sun JVM 6 initialization code: // If the maximum heap size has not been set with -Xmx, // then set it as fraction of the size of physical memory, // respecting the maximum and minimum sizes of the heap. - 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: Xmx definition
Thanks, That was a great help ! On Mon, Feb 15, 2010 at 4:00 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Amir Hadadi [mailto:ami...@correlix.com] Subject: Xmx definition I'm running apache tomcat version 5.5.23. my OS is CENTOS 5. Not relevant; what is relevant is the JVM version, which you didn't mention. I've used Runtime.getRuntime().getMaxMemory() to get an approximation of my Xmx. The figure I got was 842MB. I wonder were this number came from. To quote from the Sun JVM 6 initialization code: // If the maximum heap size has not been set with -Xmx, // then set it as fraction of the size of physical memory, // respecting the maximum and minimum sizes of the heap. - 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: Tomcat dies suddenly
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Carl, On 2/14/2010 4:34 PM, Carl wrote: I upgraded to 5.1.11 but can go back to 3.1.12 in about 15 minutes. Have been running all day on 5.1.11... no burps so far but I haven't been pushing it. Tomoroow, I will see if I can break it. Just don't change too much at once: you'll never know what fixed the problem :) - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5Xw0ACgkQ9CaO5/Lv0PDZ/wCgpQWpFmvPKGjJUKEz7wYK0TVu YMoAn3LR7bA7QJjqQ5hdnlOkDu1TVK0A =rdCw -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Tomcat 6 is getting down
On 15/02/2010 12:41, vramanaj wrote: Tomcat is getting down automatically, after few seconds of starting it. Attached is the tomcat log. Could n't able to identify the issue. Please help me out. It is a funky cat. /appallingpun p - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: Tomcat 6 is getting down
From: Pid [mailto:p...@pidster.com] Subject: Re: Tomcat 6 is getting down It is a funky cat. /appallingpun Perhaps they could name the server Marvin: ...and then of course I've got this terrible pain in all the diodes down my left hand side... - 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
roll based security with tomcat
hello friends. i am learning to implement roll (form) based security with tomcat. i got few examples on google but found difficult to understand. please help me how to do it? please forward a simple example if possible. i will be grateful. thank you. -- View this message in context: http://old.nabble.com/roll-based-security-with-tomcat-tp27595912p27595912.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
Is it possible to replace the HttpSession implementation in Tomcat?
Hi all guys and very nice to meet the Tomcat community, I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Thanks in advance, every suggestion will be very appreciated. Simo [1] http://www.hazelcast.com/ http://people.apache.org/~simonetripodi/ - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: roll based security with tomcat
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Sonali, On 2/15/2010 11:01 AM, sonali_india wrote: i am learning to implement roll (form) based security with tomcat. That's role-based security. Roll-based security would be based upon dice, I guess. i got few examples on google but found difficult to understand. please help me how to do it? please forward a simple example if possible. i will be grateful. See chapter 12 of the servlet specification. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5f3kACgkQ9CaO5/Lv0PAEBgCgnWbKpORTUG2Y8IfCYh9citu5 JcYAn09Spd2pY4r36gxInYMkK1ANpZFN =UJoP -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Is it possible to replace the HttpSession implementation in Tomcat?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Simone, On 2/15/2010 12:05 PM, Simone Tripodi wrote: I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Why not use the session replication that comes with Tomcat? Otherwise, presumably Hazelcast knows how to integrate their own product with Tomcat. You might have better luck asking them. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5f/AACgkQ9CaO5/Lv0PBs2ACgh/CsaG1mdvnENrcw5Zt8cn10 tPgAni7x4ZGDvBiT2+wIoPZ5QwuOBKNG =P+WC -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: roll based security with tomcat
thank you Christopher, and sorry for the spelling mistake. would you please provide me a link to this chapter 12. please. very sorry to bother. thank you once again. Christopher Schultz-2 wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Sonali, On 2/15/2010 11:01 AM, sonali_india wrote: i am learning to implement roll (form) based security with tomcat. That's role-based security. Roll-based security would be based upon dice, I guess. i got few examples on google but found difficult to understand. please help me how to do it? please forward a simple example if possible. i will be grateful. See chapter 12 of the servlet specification. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5f3kACgkQ9CaO5/Lv0PAEBgCgnWbKpORTUG2Y8IfCYh9citu5 JcYAn09Spd2pY4r36gxInYMkK1ANpZFN =UJoP -END PGP SIGNATURE- - 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/roll-based-security-with-tomcat-tp27595912p27597250.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
RE: roll based security with tomcat
-Original Message- From: sonali_india [mailto:amit.daund...@gmail.com] Subject: Re: roll based security with tomcat would you please provide me a link to this chapter 12. http://www.lmgtfy.com/?q=servlet+spec - 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: Is it possible to replace the HttpSession implementation in Tomcat?
I'm just getting ready to ask a question like this, as I have a similar need. I'm using the built-in Tribes-based replication which works fine for short periods of time and under moderate to light load. Once the Tomcat server has been running for a day or two, though, this distributed session replication starts breaking unexpectedly. Once this happens, the apps start becoming unavailable until I restart everything. I'm trying to figure out today how I can implement a Valve or something that can store a session to a backend DB and reload that session on another Tomcat instance similar to how the PersistentManager loads user's session after a restart. Would a Valve based on PersistentValve allow me to implement a cluster-like solution such that a user login causes a write to a central database and a load balanced request to another server would see that user without forcing another login? Jon Brisbin Portal Webmaster NPC International, Inc. On Feb 15, 2010, at 11:05 AM, Simone Tripodi wrote: Hi all guys and very nice to meet the Tomcat community, I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Thanks in advance, every suggestion will be very appreciated. Simo [1] http://www.hazelcast.com/ http://people.apache.org/~simonetripodi/ - 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 not seeing servlet
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Konstantin, On 2/14/2010 8:53 AM, Konstantin Kolinko wrote: Try this instead: form name=login method=post action=AuthLogin or this form name=login method=post action=./AuthLogin Even better: form name=login method=post action=%= response.encodeURL(request.getContextPath() +/AuthLogin)% This will encode the URL with the session id if necessary, and pre-pend any context path necessary. As pointed our by another poster, the use of a tag library such as JSTL's c:url takes care of this for you, and always uses context-relative URLs (just as the above code would do). - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5kQ0ACgkQ9CaO5/Lv0PDs5gCfbQvX7JSjX2FdkquQjUYqyApt EZQAnjgHll4T6kCUX0u3aDafbGUuCSoF =3lsS -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Is it possible to replace the HttpSession implementation in Tomcat?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Jon, On 2/15/2010 12:55 PM, Jon Brisbin wrote: I'm using the built-in Tribes-based replication which works fine for short periods of time and under moderate to light load. Once the Tomcat server has been running for a day or two, though, this distributed session replication starts breaking unexpectedly. Once this happens, the apps start becoming unavailable until I restart everything. That's unfortunate. You should post a complaint that you are observing this behavior. AFAIK, the Tomcat devs are quite satisfied with their replication implementation. Get ready to defend your use of session objects, though :) I'm trying to figure out today how I can implement a Valve or something that can store a session to a backend DB and reload that session on another Tomcat instance similar to how the PersistentManager loads user's session after a restart. Would a Valve based on PersistentValve allow me to implement a cluster-like solution such that a user login causes a write to a central database and a load balanced request to another server would see that user without forcing another login? I would think that simply using the existing PersistenceManager + JDBCStore would work. In tact, it's even documented to be one of the ways of achieving session clustering without doing in-memory replication: http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html Unfortunately, I didn't see any specifics on how to configure Tomcat to do just that, though I must admit I didn't spend very much time looking. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5khwACgkQ9CaO5/Lv0PCydwCdE/ZjGWYg91P+anDZIFYhilSz QVUAniRKuLV/TSUphnlBhEdKIKDGC2TM =+FuL -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Is it possible to replace the HttpSession implementation in Tomcat?
Hi Cris, thanks for your reply and nice to meet you :) There's no specific reason why I don't want to use the built-in session replication, even if I'd be able to realize what I've in my mind, the sysadmins will never let me know to use it since they're confident with the Tomcat solution. BTW, I'm just curious and like very much integrating heterogeneous software layers in an original way, so before spending time in studying the Tomcat code and understand how to realize my crazy stuff I wrote the email :P Thanks, all the best, Simo http://people.apache.org/~simonetripodi/ On Mon, Feb 15, 2010 at 6:10 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Simone, On 2/15/2010 12:05 PM, Simone Tripodi wrote: I've a web-application that needs to be replicated in more than one Tomcat, and since it is HttpSession based, I need to enable the session replication. Even if I work with very good sysadmins that know how to do it, I'm curious and would like to know if I could replace the HttpSession implementation with a my own one, I'd like to integrate Hazelcast[1] for data synchronization. Why not use the session replication that comes with Tomcat? Otherwise, presumably Hazelcast knows how to integrate their own product with Tomcat. You might have better luck asking them. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkt5f/AACgkQ9CaO5/Lv0PBs2ACgh/CsaG1mdvnENrcw5Zt8cn10 tPgAni7x4ZGDvBiT2+wIoPZ5QwuOBKNG =P+WC -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 not seeing servlet
2010/2/14 David Short dsh...@san.rr.com Thank you Juha. The c:url value='/AuthLogin'/ works nicely. -Original Message- From: Juha Laiho [mailto:juha.la...@iki.fi] Sent: Sunday, February 14, 2010 8:49 AM To: users@tomcat.apache.org Subject: Re: Tomcat not seeing servlet On 02/14/2010 06:21 PM, David Short wrote: ./AuthLogin and AuthLogin still don't work. It works with the fully qualified path http://yourserver:port/yourwebapp/AuthLogin; or ../../AuthLogin Ah, yes, that completes the picture. And below I'll somewhat repeat what Konstantin already explained, but perhaps in a little bit different way. The url-patterns you set in web.xml are relative to the application (context) root: servlet-mapping servlet-nameAuthLoginServlet/servlet-name url-pattern/AuthLogin/url-pattern /servlet-mapping .. which means that the full URL for the above servlet will be http://server:port/contextroot/AuthLogin However, URLs you set in jsp:s are true URLs, which means that the /AuthLogin in your jsp form is not relative to the application root: Login.jsp snippet: form name=login method=post action=/AuthLogin ... /AuthLogin here refers to http://server:port/AuthLogin The proposed forms form name=login method=post action=AuthLogin form name=login method=post action=./AuthLogin would both refer to http://server:port/yourwebapp/path_to_Loginjsp/AuthLogin ... where, apparently the path_to_Loginjsp in your case has two levels of directories. To make either of the above forms work, your url-pattern for the AuthLoginServlet would have to be url-pattern/path_to_Loginjsp/AuthLogin/url-pattern ... and this would pretty much be the easiest way to solve the problem; with this, your JSP could really have the form action as plain AuthLogin. The JSTL tag library does also contain a tag c:url, which helps in making URLs that refer to the application itself; that would be another solution if your application already uses JSTL. For an explanation, see f.ex. http://www.ibm.com/developerworks/java/library/j-jstl0318/ -- ..Juha - 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 -- MBA Ing. Ugo Ojeda del Arco Gerente de Desarrollo de Sistemas Universidad del Pacifico Telf. 2190100 - 2228 / 2161 PD Tarda 7 segundos en imprimir este email y 7 años en crecer el árbol que servirá para hacer el papel.
Re: JSP Page hangs... clues? (SOLVED)
For the sake of record-keeping, I believe we found the fix for this. The client got in touch with us today stating that the entire site was now unresponsive. We reviewed the log files and miraculously this time there WAS an error message (lots of them). The error was as follows: --- SEVERE: Error allocating socket processor java.lang.OutOfMemoryError: unable to create new native thread --- Googling this led me to the following: http://java-monitor.com/forum/showthread.php?t=570 and http://jroller.com/rreyelts/date/20040909 So, looking at my setenv.sh values, it turns out that Xss256m is extremely massive. It means each time a new thread was created, 256 *MEGS* would get allocated to that thread (even if it wasn't used). So we would look at top and see that there was plenty of free memory, but not realize that it had all been allocated to the threads. I reduced the value to 512k, and things are now working beautifully. I can only guess at why there were no logs when this happened previously (maybe no memory left to spawn a new logging thread? no idea...), but the page that was hanging now runs very quickly even when I hammer my refresh button on it. =D Thanks to those of you who tried to help with this issue. Hopefully this post can help someone in the future! Warm regards, Jordan Michaels Vivio Technologies http://www.viviotech.net/ Open BlueDragon Steering Committee Railo Community Distributions Jordan Michaels wrote: We have an interesting situation and I'm wondering if anyone has any ideas on where we could look for possible solutions. We have a JSP page that performs a large mysql query of product titles (just the names). The list is then spit out on the page with drill-down links. Pretty simple really. The problem is that just after a tomcat restart, the first and occasionally the second and third requests will process all the way just fine, but most subsequent requests will hang on a random record. Occasionally one will go all the way through, but most will hang. Let me clarify, we restart tomcat, hit the page, and the page loads fine. We hit refresh once or twice, and the page will fail to load fully. The page will hang after a random product title and just stop responding. You can click on any other page on the site, but this one page with the large product listing query hangs in random spots. We've studied this intently. The server this is running on is a CentOS 4, 32-bit box with 1.5 GB RAM, Apache 2, and mod_jk. Our first thought was memory issues. We increased Tomcat's memory using the setenv.sh file, which now contains the following line: JAVA_OPTS=-Xms128m -Xmx1024m -Xss256m -XX:MaxPermSize=256m ; export JAVA_OPTS We've verified that the settings are in place by using the ps ax command and making sure the java process includes the updated settings. Unfortunately, this seems to have no effect at all. We then reviewed the logs: catalina.out, mod_jk.log, and apache's error_log, among others. We monitored these logs using tail so we could see if any errors were thrown as we hit the page. No errors were thrown if the request went through good or it failed. The logs were completely quiet. We've updated Tomcat, mod_jk, the JVM, and the MySQL driver to the absolute latest versions available as of this writing. Does anyone have any clues as to where we might look for what is happening to make this one page hang? It still feels like a memory issue, but with nothing in the logs and no indicators other then the problem itself, we'd appreciate any suggestions on what to look for at this point. Thank you in advance! - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Performance issues when adding Tomcat JK redirector to IIS's Default Web Site?
On 02/15/2010 12:30 PM, Steve Ryan wrote: Are there any known performance issues with the Tomcat JK redirector, in particular, any performance issues which could affect the third-party websites as explained in my example above? Since this is filter it will participate in every request. Now this might sound scary but the actual participation is limited to matching the url with the uriworkermap.properties list. Depending on the rules used this might be as simple as a few strcasecmp operations or few regex matchings, but on any decent hardware this should be very fast. How fast, well to get a precise number you will have to measure it, but it should be fast enough so it won't be measurable without using high performance timers. Of course there are few other operations involved with each request, and the largest performance degradation will be involved with logging if you use debug level since this will force writing to the file for each request even the one not going trough isapi_redirector. However using debug logging might be worse-case scenario proof of concept since you will have in the logs the amount of time spend for each request inside isapi_redirector, so it will give you the sense of the performance degradation. Of course this time will include the time for actual logging, so the production timing would be much less. Regards -- ^TM - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
