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https://issues.apache.org/jira/browse/SAMZA-1692?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16466447#comment-16466447
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ASF GitHub Bot commented on SAMZA-1692:
---------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/samza/pull/496
> Standalone stability fixes.
> ---------------------------
>
> Key: SAMZA-1692
> URL: https://issues.apache.org/jira/browse/SAMZA-1692
> Project: Samza
> Issue Type: Bug
> Reporter: Shanthoosh Venkataraman
> Assignee: Shanthoosh Venkataraman
> Priority: Major
> Fix For: 0.15.0, 0.15
>
>
> * Currently on session expiration, processorListener with incorrect
> generationId is registered with zookeeper(ZkUtils generationId is incremented
> on reconnect but the generationId in processorListener is zero all the time).
> When this happens to immediate successor to leader, leader expiration event
> will be skipped by that processor. This will prevent leader re-election on a
> current leader death and will stall the processors group. Fix is to
> re-instantiate and then register processorChangeListener on session
> expiration.
> * Add processorId to debounce thread name (this can aid debugging when
> multiple processors are running within a jvm).
> * After ScheduleAfterDebounceTime queue is shutdown, don't accept new
> schedule requests. Current ZkJobCoordinator shutdown sequence comprise of the
> following steps:
> ** Shutdown the ScheduleAfterDebounceTime queue.
> ** Stop the zkClient and relinquish it's resources.
>
> After we shutdown ScheduleAfterDebounceTime and before zkclient is stopped,
> any new operations can be scheduled in ScheduleAfterDebounceTime queue by
> zkClient. This will result in RejectedExecutionException, since
> executorService is stopped.
> sample exception:
> {code:java}
> Caused by: java.util.concurrent.RejectedExecutionException: Task
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@23f962a8
> rejected from java.util.concurrent.ScheduledThreadPoolExecutor@43408be8
> {code}
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