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https://issues.apache.org/jira/browse/HBASE-20515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17245092#comment-17245092
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Shroff Amrith Nayak commented on HBASE-20515:
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Additionally, I have observed that there is one shutdown hook spawned from
`HFileArchiver#getArchiveExecutor` that is tied to the PEWorkerGroup
ThreadGroup which can throw an `IllegalStateException` on JVM shutdown if the
minicluster is stopped in a different lifecycle, say when test case execution
is completed. This can cause `ApplicationShutdownHooks` (openJDK) to
prematurely terminate potentially causing cascading errors.
Interested to discuss alternative solutions.
> Cleanup ProcedureExecutor#stop and #join interaction/dependency
> ---------------------------------------------------------------
>
> Key: HBASE-20515
> URL: https://issues.apache.org/jira/browse/HBASE-20515
> Project: HBase
> Issue Type: Task
> Components: amv2
> Reporter: Michael Stack
> Priority: Major
>
> See HBASE-20169 discussion toward the end. What the discussion makes clear is
> that there is an ordering expected around the shutdown of
> PerformanceExecutor; first #stop must be called and then #join. In
> multi-threaded context, this may not always happen.
> Also look at #join. It is doing harvesting and cleanup which is not what a
> #join usually does; #join is usually more an observer than a final tidying of
> resources.
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