On 8/14/14 10:02 AM, Wang Weijun wrote:

I am looking at "8054896: Loading a KeyStore prevents GC of Classloader" and am now able to reproduce it on my system. I do see the webapp-related classes present in a heapdump created by VisualVM but not sure what the next steps should be to tell why they are not GC'ed. Is there a good tutorial on this?

Thanks Max

Hi Max, If you are able to determine which instance of which classes should have been garbage collected but weren't, the next step would be to select one of them and ask jvisualvm to find the nearest GC root. That should give you a hint of who is holding a reference to the instance. The next step - often harder - is to figure out why. http://visualvm.java.net/heapdump.html hope this helps, -- daniel