Core Dump and Stack Tace on Linux of a Java process

Run the command
# ps -ef | grep java

get the process id of the java process you want to get the core dump.

Next run the command
# gdb --pid=
Next
gdb>gcore
This should create a file core. in the /var/tmp location

Remember its a binary file.

If I find some other better way to take the dump, I would update.
If you know other ways please let me know.