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Tomcat classes from previous run remains

+1 vote
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I am running an j2ee application which uses spring, hibernate, jsf, etc. The application also uses ha-jdbc to make the databases highly available. When the application is deployed for the first time, the app runs smoothly, but when it is un-deployed and deployed back, tomcat gives the following error:

The following web applications were stopped (reloaded, undeployed), but their classes from previous runs are still loaded in memory, thus causing a memory leak (use a profiler to confirm):

I am wondering how to get rid of this problem. One Solution is restarting the server. Please let me know the solution with out restarting the server if any.

posted Sep 19, 2013 by Mandeep Sehgal

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1 Answer

+1 vote

I'd suggest you start by reading this. It's a good introduction to the problem.
https://people.apache.org/~markt/presentations/2010-11-04-Memory-Leaks-60mins.pdf

Then get a Profiler and follow the steps on slide #11. Once you figure out what is holding a reference to your application, you can determine where you go from there to fix it. Sometimes it something you need to fix in your code, sometimes it's something in a third party library that needs fixed.

Further detail can be found on the FAQ here.
https://wiki.apache.org/tomcat/MemoryLeakProtection
https://wiki.apache.org/tomcat/OutOfMemory

answer Sep 19, 2013 by Bob Wise
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