Chris M. Hostetter created SOLR-14635:
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Summary: improve ThreadDumpHandler to show more info related to
locks
Key: SOLR-14635
URL: https://issues.apache.org/jira/browse/SOLR-14635
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Chris M. Hostetter
Having recently spent some time trying to use ThreadDumpHandler to diagnose a
"lock leak" i realized there are quite a few bits of info available from the
ThreadMXBean/ThreadInfo datastcutures that are not included in the response,
and i think we should add them:
* switch from {{findMonitorDeadlockedThreads()}} to {{findDeadlockedThreads()}}
to also detect deadlocks from ownable syncrhonizers (ie: ReintrantLocks)
* for each thread:
** in addition to outputing the current {{getLockName()}} when a thread is
blocked/waiting, return info about the lock owner when available.
*** there's already dead code checking this and then throwing away the info
** return the list of all locks (both monitors and ownable synchronizers) held
by each thread
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