Collecting a JRockit Thread Dump
The easiest way to get a thread dump is to use the jrcmd command, which was discussed earlier in this chapter. Another important technique would be to trigger a diagnostic image dump or thread dump using the WLDF watches and notifications. One can easily write a watch that is triggered when a thread gets “stuck” and automatically trigger a diagnostic image dump that will include the stack trace and generate an e-mail to the administrator. Tracking hogging threads is also a very useful thing to configure. It is easy to add a watch that will track the hogging thread count and generate an image dump when it exceeds a certain count.
You can also generate a JRockit JVM thread dump with any one of the following methods: ...
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