Ken Bowen wrote: > Hey Mark, > > This is really good. > Presumably this is an outline for success It has a 100% success rate so far on a admittedly small sample size of around 5 (I can't remember the exact number).
Mark >-- and it is definitely an > outline for improvement of my rather improvished skills in this area. > Many thanks! > > Ken > > On Apr 21, 2009, at 5:54 PM, Mark Thomas wrote: > >> 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 >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
