RE: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
I have a copy of the old jvmstat if you'd like me to email it to you direct? -Original Message- From: Kevin A. Burton [mailto:[EMAIL PROTECTED] Sent: 15 November 2004 19:51 To: Tomcat Users List Subject: Re: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4 Dale, Matt wrote: I've not been following this thread but my guess would be that you are running out of space in the permanent generation of the heap. Get a hold of jvmstat from sun and run visualgc on your JVM, it should become obvious then which pool is running out of space. God! How pathetic is this: http://java.sun.com/performance/jvmstat/#Download This distribution of the jvmstat tools requires J2SE 5.0 with the HotSpot JVM. So now I have to upgrade all our VMs to JDK 5.0 even though earlier versions of jvmstat supported JDK 1.4. Brilliant... who's the marketing genius that though of this one!? ... and of course they don't link to archival versions. The SUN has set my friends ;-) Kevin -- Use Rojo (RSS/Atom aggregator). Visit http://rojo.com. Ask me for an invite! Also see irc.freenode.net #rojo if you want to chat. Rojo is Hiring! - http://www.rojonetworks.com/JobsAtRojo.html If you're interested in RSS, Weblogs, Social Networking, etc... then you should work for Rojo! If you recommend someone and we hire them you'll get a free iPod! Kevin A. Burton, Location - San Francisco, CA AIM/YIM - sfburtonator, Web - http://peerfear.org/ GPG fingerprint: 5FB2 F3E2 760E 70A8 6174 D393 E84D 8D04 99F1 4412 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Any opinions expressed in this E-mail may be those of the individual and not necessarily the company. This E-mail and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this E-mail in error and that any use or copying is strictly prohibited. If you have received this E-mail in error please notify the beCogent postmaster at [EMAIL PROTECTED] Unless expressly stated, opinions in this email are those of the individual sender and not beCogent Ltd. You must take full responsibility for virus checking this email and any attachments. Please note that the content of this email or any of its attachments may contain data that falls within the scope of the Data Protection Acts and that you must ensure that any handling or processing of such data by you is fully compliant with the terms and provisions of the Data Protection Act 1984 and 1998. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
Remy Maucherat wrote: On Sat, 13 Nov 2004 17:30:38 -0800, Kevin A. Burton [EMAIL PROTECTED] wrote: Remy Maucherat wrote: On Fri, 12 Nov 2004 17:17:28 -0800, Kevin A. Burton [EMAIL PROTECTED] wrote: - For all my JSPs I fetch them with the URL foo.jsp?jsp_precompile=true to trigger precompilation How many JSPs must be compiled to cause problems ? About 50 or so... it changes every time. Sometimes I have to trigger a precompile twice. I don't quite understand in which cases problems occur: - if you ?jsp_precompile=true 50 times for the same JSP ? - if you ?jsp_precompile=true for 50 different JSPs ? - if you access normally 50 different JSPs (triggering compilation for each one) ? I would understand from your description only the second one is an issue. Can you confirm this ? Yes... I use #2 I trigger a ?jsp_precompile=true for each one of my JSPs and we have around 300-400 ... Around 100 or so it will run out of memory. Kevin -- Use Rojo (RSS/Atom aggregator). Visit http://rojo.com. Ask me for an invite! Also see irc.freenode.net #rojo if you want to chat. Rojo is Hiring! - http://www.rojonetworks.com/JobsAtRojo.html If you're interested in RSS, Weblogs, Social Networking, etc... then you should work for Rojo! If you recommend someone and we hire them you'll get a free iPod! Kevin A. Burton, Location - San Francisco, CA AIM/YIM - sfburtonator, Web - http://peerfear.org/ GPG fingerprint: 5FB2 F3E2 760E 70A8 6174 D393 E84D 8D04 99F1 4412
Re: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
Dale, Matt wrote: I've not been following this thread but my guess would be that you are running out of space in the permanent generation of the heap. Get a hold of jvmstat from sun and run visualgc on your JVM, it should become obvious then which pool is running out of space. God! How pathetic is this: http://java.sun.com/performance/jvmstat/#Download This distribution of the jvmstat tools requires J2SE 5.0 with the HotSpot JVM. So now I have to upgrade all our VMs to JDK 5.0 even though earlier versions of jvmstat supported JDK 1.4. Brilliant... who's the marketing genius that though of this one!? ... and of course they don't link to archival versions. The SUN has set my friends ;-) Kevin -- Use Rojo (RSS/Atom aggregator). Visit http://rojo.com. Ask me for an invite! Also see irc.freenode.net #rojo if you want to chat. Rojo is Hiring! - http://www.rojonetworks.com/JobsAtRojo.html If you're interested in RSS, Weblogs, Social Networking, etc... then you should work for Rojo! If you recommend someone and we hire them you'll get a free iPod! Kevin A. Burton, Location - San Francisco, CA AIM/YIM - sfburtonator, Web - http://peerfear.org/ GPG fingerprint: 5FB2 F3E2 760E 70A8 6174 D393 E84D 8D04 99F1 4412 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
I've not been following this thread but my guess would be that you are running out of space in the permanent generation of the heap. Get a hold of jvmstat from sun and run visualgc on your JVM, it should become obvious then which pool is running out of space. Ta Matt -Original Message- From: Kevin A. Burton [mailto:[EMAIL PROTECTED] Sent: 14 November 2004 01:31 To: Tomcat Users List Subject: Re: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4 Remy Maucherat wrote: On Fri, 12 Nov 2004 17:17:28 -0800, Kevin A. Burton [EMAIL PROTECTED] wrote: - For all my JSPs I fetch them with the URL foo.jsp?jsp_precompile=true to trigger precompilation How many JSPs must be compiled to cause problems ? About 50 or so... it changes every time. Sometimes I have to trigger a precompile twice. Note that the VM still shows plenty of memory so I'm not sure what the heck is going on here. I also looked at our file handles and they seem fine too. In that kind of situation, a profiler will have to be used. All I can tell right now is that it has nothing to do with the Java compilation, which is not very surprising. Why is it then that doing a ?jsp_precompile=true for all my JSPs and NO other action causes this? For really large web applications, I think you should precompile as many JSPs as possible anyway, as a JSP compiled dynamically will always use more resources (even if there is no bug in Jasper). Well thats probably an approach we will take but its unfortunate. If i had a profiler I would connect it to figure out whats going on but I'm really not happy with any of them. Kevin -- Use Rojo (RSS/Atom aggregator). Visit http://rojo.com. Ask me for an invite! Also see irc.freenode.net #rojo if you want to chat. Rojo is Hiring! - http://www.rojonetworks.com/JobsAtRojo.html If you're interested in RSS, Weblogs, Social Networking, etc... then you should work for Rojo! If you recommend someone and we hire them you'll get a free iPod! Kevin A. Burton, Location - San Francisco, CA AIM/YIM - sfburtonator, Web - http://peerfear.org/ GPG fingerprint: 5FB2 F3E2 760E 70A8 6174 D393 E84D 8D04 99F1 4412 Any opinions expressed in this E-mail may be those of the individual and not necessarily the company. This E-mail and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this E-mail in error and that any use or copying is strictly prohibited. If you have received this E-mail in error please notify the beCogent postmaster at [EMAIL PROTECTED] Unless expressly stated, opinions in this email are those of the individual sender and not beCogent Ltd. You must take full responsibility for virus checking this email and any attachments. Please note that the content of this email or any of its attachments may contain data that falls within the scope of the Data Protection Acts and that you must ensure that any handling or processing of such data by you is fully compliant with the terms and provisions of the Data Protection Act 1984 and 1998. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
On Sat, 13 Nov 2004 17:30:38 -0800, Kevin A. Burton [EMAIL PROTECTED] wrote: Remy Maucherat wrote: On Fri, 12 Nov 2004 17:17:28 -0800, Kevin A. Burton [EMAIL PROTECTED] wrote: - For all my JSPs I fetch them with the URL foo.jsp?jsp_precompile=true to trigger precompilation How many JSPs must be compiled to cause problems ? About 50 or so... it changes every time. Sometimes I have to trigger a precompile twice. I don't quite understand in which cases problems occur: - if you ?jsp_precompile=true 50 times for the same JSP ? - if you ?jsp_precompile=true for 50 different JSPs ? - if you access normally 50 different JSPs (triggering compilation for each one) ? I would understand from your description only the second one is an issue. Can you confirm this ? -- x Rémy Maucherat Developer Consultant JBoss Group (Europe) SàRL x - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
On Fri, 12 Nov 2004 17:17:28 -0800, Kevin A. Burton [EMAIL PROTECTED] wrote: - For all my JSPs I fetch them with the URL foo.jsp?jsp_precompile=true to trigger precompilation How many JSPs must be compiled to cause problems ? Note that the VM still shows plenty of memory so I'm not sure what the heck is going on here. I also looked at our file handles and they seem fine too. In that kind of situation, a profiler will have to be used. All I can tell right now is that it has nothing to do with the Java compilation, which is not very surprising. For really large web applications, I think you should precompile as many JSPs as possible anyway, as a JSP compiled dynamically will always use more resources (even if there is no bug in Jasper). -- x Rémy Maucherat Developer Consultant JBoss Group (Europe) SàRL x - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
Remy Maucherat wrote: On Fri, 12 Nov 2004 17:17:28 -0800, Kevin A. Burton [EMAIL PROTECTED] wrote: - For all my JSPs I fetch them with the URL foo.jsp?jsp_precompile=true to trigger precompilation How many JSPs must be compiled to cause problems ? About 50 or so... it changes every time. Sometimes I have to trigger a precompile twice. Note that the VM still shows plenty of memory so I'm not sure what the heck is going on here. I also looked at our file handles and they seem fine too. In that kind of situation, a profiler will have to be used. All I can tell right now is that it has nothing to do with the Java compilation, which is not very surprising. Why is it then that doing a ?jsp_precompile=true for all my JSPs and NO other action causes this? For really large web applications, I think you should precompile as many JSPs as possible anyway, as a JSP compiled dynamically will always use more resources (even if there is no bug in Jasper). Well thats probably an approach we will take but its unfortunate. If i had a profiler I would connect it to figure out whats going on but I'm really not happy with any of them. Kevin -- Use Rojo (RSS/Atom aggregator). Visit http://rojo.com. Ask me for an invite! Also see irc.freenode.net #rojo if you want to chat. Rojo is Hiring! - http://www.rojonetworks.com/JobsAtRojo.html If you're interested in RSS, Weblogs, Social Networking, etc... then you should work for Rojo! If you recommend someone and we hire them you'll get a free iPod! Kevin A. Burton, Location - San Francisco, CA AIM/YIM - sfburtonator, Web - http://peerfear.org/ GPG fingerprint: 5FB2 F3E2 760E 70A8 6174 D393 E84D 8D04 99F1 4412
OutOfMemory errors compiling JSPs on 5.0.16 and 5.5.4
I'm having a terrible time trying to get my JSPs compiled on Tomcat. We started having OutOfMemory problems a while back and I've tracked it down to JSP compilation. Here's what I can do to replicate the problem: - shutdown tomcat - remove the work directory - startup tomcat - For all my JSPs I fetch them with the URL foo.jsp?jsp_precompile=true to trigger precompilation After about 10 minutes (and 50-100 JSP files) Tomcat will fail with: SEVERE: Servlet.service() for servlet jsp threw exception java.lang.OutOfMemoryError Note that the VM still shows plenty of memory so I'm not sure what the heck is going on here. I also looked at our file handles and they seem fine too. I've followed all suggestions I've found via Google including: - setting fork to true - using jikes - Migrating to Tomcat 5.5.4 to use jdtool. The machine has PLENTY of memory available: export JAVA_OPTS=-server -Xmx1280M -Xms512M -Djava.awt.headless=true Any suggestions would be appreciated. We're probably going to migrate to using the command line JspC compiler to build all our JSPs before hand so the webapp doesn't need to compile them at runtime but this seems like a cheap workaround. I'd rather Tomcat weren't broken in this regard. Kevin -- Use Rojo (RSS/Atom aggregator). Visit http://rojo.com. Ask me for an invite! Also see irc.freenode.net #rojo if you want to chat. Rojo is Hiring! - http://www.rojonetworks.com/JobsAtRojo.html If you're interested in RSS, Weblogs, Social Networking, etc... then you should work for Rojo! If you recommend someone and we hire them you'll get a free iPod! Kevin A. Burton, Location - San Francisco, CA AIM/YIM - sfburtonator, Web - http://peerfear.org/ GPG fingerprint: 5FB2 F3E2 760E 70A8 6174 D393 E84D 8D04 99F1 4412 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
