How to get Java thread dump in Jboss » History » Revision 3
Revision 2 (chin-yeh, 11/11/2010 12:30 PM) → Revision 3/4 (chin-yeh, 11/11/2010 12:32 PM)
h1. How to get Java thread dump in Jboss
This guide is only applicable to:
* Linux OS with *netcat* package installed
* Jboss AS 4.x (it may work for Jboss 5.x)
*Steps*
# first, find out the Jboss's web listening port and address.
## the listening port can be found in:
<pre>
${Jboss Directory}/server/${profile name}/deploy/jboss-web.deployer/server.xml
</pre>
## the listening address can be found in:
<pre>
netstat -tuna | grep ${listening port}
</pre>
# ssh to the target server
# *cd* to */tmp*
# execute the following command:
This command will output the result to current directory with a file named, thread_dump.${timestamp}
** *Template:*
<pre>
$ echo -e "GET /jmx-console/HtmlAdaptor?action=invokeOp&name=jboss.system%3Atype%3DServerInfo&methodIndex=1 \n\n" | nc listen_ip listen_port | cat > thread_dump.$(date +%Y-%m-%d_%H_%M_%S)
</pre>
*** replace *listen_ip* with the listening IP
*** replace *listen_port* with the listening port
** *Example:*
<pre>
$ echo -e "GET /jmx-console/HtmlAdaptor?action=invokeOp&name=jboss.system%3Atype%3DServerInfo&methodIndex=1 \n\n" | nc 127.0.0.1 8080 | cat > thread_dump.$(date +%Y-%m-%d_%H_%M_%S)
</pre>
# append the *.html* to the output file
*From:*
<pre>
thread_dump.2010-11-11_12_08_26 thread_dump.2010-11-11_12_08_26.html
</pre>
*To:*
<pre>
thread_dump.2010-11-11_12_08_26.html
</pre>
# download the output file to local machine
# done.