Why is webappclassloader not collecting garbage?

Question

I have a web service developed by spring / hibernate, and when I deployed and deployed many times on Tomcat 7, I get a memory leak OutOfMemoryError PermGen.

Using java VisualVM, I noticed that the previous webappClassLoader is still stored in the JVM, so they are not going to garbage.

What could be the cause of this problem?

How can I determine which objects still reference the application class loader or any object loaded by it?

Thank,

Answer 1

: . , , - , . , , Tomcat.

:

• Tomcat
• WebappClassLoader
• , , start = false
• GC WebappClassLoader
• .

.

, : http://people.apache.org/~markt/presentations/2010-08-05-Memory-Leaks-JavaOne-60mins.pdf