Ken Bowen wrote: > Mark, > > Any chance we could make a headstart on "Resolving OOM-PermGen errors on > webapp reload" ?? > Perhaps some general pointers, guidance etc. [to help you refine the > talk in advance :-) ]
The very short version. 1. Find an app that you can't reload without OOME 2. Get a profiler - I like Yourkit Full disclosure: they give ASF committers a free copy 3. Reload you app once 4. Use the profiler to look for instances of WebappClassLoader 5. Look for the one with the started attribute == false 6. Trace the GC roots for this instance 7. Fix whatever is hanging on to references to the instance - there should not be any The session (assuming it goes ahead) will do a demo of the above and expand on 7 in terms of typical culprits and possible workarounds. It will also explain what is going on and why this happens. HTH, Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
