out of memory error

[Migrated From Jforum.net]

Now I've been running Tomcat for some time now (5.5.12) and I've not seen this before. JForum was recently added running in a separate context. This is on a pretty beefy dual processor Athlon with 2 gigs of ram and jdk1.5.0_05.

Today I was using the Admin Control Panel. Adding and deleting categories/forums. After a few deletes/inserts I saw this:

Exception in thread "TP-Processor16" Exception in thread "TP-Processor15" java.lang.OutOfMemoryError: PermGen space
java.lang.OutOfMemoryError: PermGen space

Anyone else seen this?
[originally posted on jforum.net by conquest]

[Migrated From Jforum.net]

Which JForum version? It was running for how long until it broke? you think it *may be* JForum leak, or are you *sure* it is?

Rafael
[originally posted on jforum.net by Rafael Steil]

[Migrated From Jforum.net]

Well I just noticed that after I added JForum (1.5 from cvs) this started. I'm not sure where the problem lies.

But after reading this article it's possible it may be JVM settings:

http://www.theserverside.com/news/thread.tss?thread_id=36743

[originally posted on jforum.net by conquest]

[Migrated From Jforum.net]

Yes you're right ... should have done this.

I've add it to my startup script.

[originally posted on jforum.net by conquest]

[Migrated From Jforum.net]

Indeed, I will bet that you discover the need to increase your JVM's memory settings. These are included in the command line options passed to the JVM that runs tomcat. They are established in your tomcat's startup script.

The default setting is something like 64MB, which is adequate only for the simplest webapps. If you are running JForum, or any serious webapp, I recommend increasing your memory to an initial 128MB, with a maximum of 512MB.

My Linux rc script includes this line:

export JAVA_OPTS="-Xms256m -Xmx512m"

[originally posted on jforum.net by time]