Java.sun.com has a pretty good article
(http://java.sun.com/developer/technical ... ubleshoot/)
on deployment troubleshooting tips. Sun Java evangelist Chuk-Munn Lee
offers a summary of best practices when locating Java SE 6 issues
during deployment. It's an excellent update on JDK 6 tools with a lot
of insight into the Java HotSpot JVM, the Garbage Collector, jinfo,
jstat, memory problems and the like.

thanks for sharing

you are welcome .