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java out of memory error

 
anish kumarv
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Hi all,

Today we experienced "java out of memory error : Permgen space". But we have java heap size value of 1GB.

While googled for this i found some thing like permgen space is a space where class files are being loaded and they were not unloaded and the scenario is termed as memory leak.

So i just want all your suggestions to get rid of this problem. And i cannot increase the java heap value as i have already assigned the maximum allowed value.

Kindly post your suggestions.

With Regards
Anish Kumar.V
 
William Brogden
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There is no simple answer to this common problem.

Any number of errors in your application programming could be at fault.

After a fresh start, how many requests are processed until you hit the error?

Have you used the Tomcat management app to watch changes in memory use?

Bill

 
Tim Holloway
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The most common cause of this problem is when an application is redeployed "hot" in Tomcat6, and there are indications that it's actually somewhat of a bug. Certainly I'd never heard of it in Tomcat5.

The heap is not the PermGen space. There's a separate config parameter in the Oracle/Sun JVM for PermGen space. However, I played around with that parameter about 2 weeks ago to no avail. I'm hoping Tomcat7 is going to do better.
 
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