If Confluence stops responding, or is performing poorly, you should create a thread dump to help Atlassian determine the cause of the problem.

This will show the state of each thread in the JVM, including a stack trace and information about what locks the thread is holding and waiting for.

Generating a Thread Dump on Windows

To take a thread dump from Windows:

  1. Visit http://www.adaptj.com/root/main/download and click Launch
  2. Click Run for any security warnings
  3. Select Process -> Thread Dump
  4. Under Process Id, select the '...' button.
  5. From the drop-down list, select the Confluence process. Users running Confluence Standalone, select the 'Java (Tomcat) ...' option. Users running Confluence WAR should select their application server process.
  6. Ensure that the "Thread dump" and "Keep Remote Thread Running" is selected.
  7. Click OK to capture the thread dump.
  8. Save the output to a file, eg 'threaddump.log'
  9. If you were asked by Atlassian technical support to create the thread dump, attach the logfile to the support ticket.

Alternatively, if you are not running Confluence as a service, click on the console and press <CTRL>+BREAK

Generating a Thread Dump on Linux, including Solaris and other Unixes

Find the process ID of the JVM and use the ps command to get list of all processes:

kill -3 <pid>

Note: This will not kill your server (so long as you included the "-3" option, no space in between).
The thread dump will be printed to Confluence's standard output (catalina.out).

Thread Dump Tools

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