If your DE Server is hung, has performance problems, or fails to start support will request that you to collect thread dumps.
You will be asked to run as many as 5 – 6 at intervals of approximately 20 seconds appart while you are having a problem.
If DE is up and running you can use the CLI utility "THREADDUMP" , if DE is not running you will need to use external tools like 'jstack' or 'JVisualVM'
The jstack command is part of JDK and is not shipped with DE. You will need to download the utility from the internet and install the same version of JRE that WA DE uses.
For more informaton on the jstack command see
The jstack command requires the process id number (PID) of the DE server
$JDK_HOME\bin\jstack <DEServer PID> >> /tmp/DEthreaddumps.txt
<jdk>\bin\jstack <DEServer PID> >> threaddumps.txt