java-thread-dump

http://www.crazysquirrel.com/computing/java/basics/java-thread-dump.jspx

Generating a Thread Dump
Windows
The Java application that you want to produce a thread dump for must be running / started in a command console. When you want to produce a thread dump press Ctrl-Break

Note: it's easier to produce a thread dump on Linux as the JVM doesn't need to be started in a console window.

Linux
If the JVM is running in a console then simply press Ctrl-\.

If the JVM is running in the background then send it the QUIT signal:

kill -QUIT process_idThere process_id is the process number of the running Java process. The thread dump will be sent to wherever standard out is redirected too.

You can generally get the process numbers of of all running Java processes with the command:

ps axf | grep java