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    <p>I think you may have two kinds of leaks going on at the same time. Spring is warning you about a normal "heap" memory leak. This has not caused you a problem yet, because ... your redeployment is also causing excessive PermGen usage, and this problem is hitting you first. For info on the second kind of leak see <a href="https://stackoverflow.com/questions/88235/dealing-with-java-lang-outofmemoryerror-permgen-space-error">Dealing with &quot;java.lang.OutOfMemoryError: PermGen space&quot; error</a> [Thanks duffymo]</p> <p>[update]</p> <p>Since you say the suggestions in the above link did not help, the only other suggestions I can think of are:</p> <ul> <li>make sure your spring beans are cleaning themselves up when spring shuts down</li> <li>every bean that allocates a resource (anything unlikely to be garbage collected) in the constructor or init method should have a destroy method to deallocate it</li> <li>this is especially true for any beans that reference any classes in the spring-data module, catalina is complaining about a class in this module</li> <li>increase your permgen space. Even if this suggestion did not fix the problem adding something like the following should make these failures occur less frequently.</li> </ul> <blockquote> <p>Try -XX:MaxPermSize=256m and if it persists, try -XX:MaxPermSize=512m</p> </blockquote> <p>The ultimate uber-brute-force approach is to gradually strip things out of your app until the problem goes away. That will help you narrow it down to the point where you can identify whether it is an issue with your code or a bug in Spring, Hibernate etc</p>
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    1. POMemory Leak on stop or redeploy - Spring 3.1.2, Hibernate 4.1.0, Spring Data-Jpa 1.1.0, Tomcat 7.0.30
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    1. COThanks for the help! Unfortunately, trying the various suggestions (VM switches) did not solve my problem. It seems this is a Spring problem?
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    2. COShort answer: don't know. Long answer: see update
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    3. COThank for the guidance. I'll try pouring over the code carefully to see if I'm holding onto references that I shouldn't. Perhaps I should use some @PreDestroy methods in some of the beans?
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