Deadlock detection in hprof file

[gpo]

Hello,

Is it possible to use automatically detect deadlocks in HPROF snapshots?

Thanks,
George

[Anton Katilin]

Hi George

No.

Although HPROF may contain stack traces of running threads at the moment of its creation, there is no information about monitors which is essential for deadlock detection.

Best regards,
Anton

[gpo]

Hi George

No.

Although HPROF may contain stack traces of running threads at the moment of its creation, there is no information about monitors which is essential for deadlock detection.

Best regards,
Anton

Hello Anton,

Thank you for your answer. I also have thread dumps taken with the jstack tool. Does YJP support those? if it does, can they be used for automatic deadlock detection? If not, do you know if there's anything else I can do that would help me identify a deadlock without having to attach to the running process?

Thanks.

Best regards,
George

[Anton Katilin]

The profiler does not load jstack output because this makes no sense: jstack detects deadlocks by itself, and its output does not require any further processing. It's already a human readable text with all necessary detail.

http://docs.oracle.com/javase/7/docs/we ... gloop.html

identify a deadlock without having to attach to the running process

If you mean without attaching the profiler agent, please use jstack.
Or call the API directly, for example:
http://stackoverflow.com/questions/3958 ... mp-via-jmx

[gpo]

Got it. Thank you for being helpful and for all your answers Anton.