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https://issues.apache.org/jira/browse/AURORA-1944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16118748#comment-16118748
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John Sirois edited comment on AURORA-1944 at 8/8/17 6:01 PM:
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The 1st problem you point out is only a problem because of the 2nd problem -
that's the root. Retry is implemented via shutdown, so shutdown needs to work.
Fixing an illegal CONSTRUCTED -> STOPPED with a flip from sync to async
groupCache seems fishy, digging in to that code later today...
was (Author: jsirois):
The 1st problem you point out is only a problem because of the 2nd problem -
that's the root. Retry is implemented via shutdown, so shutdown needs to work.
Fixing an illegal CONSTRUCTED -> STOPPED with a flip from sync to asycn
groupCache seems fishy, digging in to that code now.
> Aurora is unable to elect leader after losing ZK for an extended period of
> time
> -------------------------------------------------------------------------------
>
> Key: AURORA-1944
> URL: https://issues.apache.org/jira/browse/AURORA-1944
> Project: Aurora
> Issue Type: Bug
> Components: Scheduler
> Environment: Running on 0.17.0
> Reporter: Renan DelValle
> Attachments: aurora-0.log, aurora-1.log, aurora-2.log
>
>
> Using Apache Curator as the Zookeeper library causes an issue where Aurora is
> unable to elect a leader if Zookeeper loses quorum for an extended period of
> time.
> Scheduler seems to crash around:
> {{W0802 14:01:14.436 [TaskEventBatchWorker, SchedulerLifecycle] Failed to
> leave leadership:
> org.apache.aurora.common.zookeeper.SingletonService$LeaveException: Failed to
> abdicate leadership of group at /aurora/scheduler}}
> When the init system brings the scheduler back up, it is unable to elect a
> leader if ZK is still down.
> Specifically, the redirect monitor fails:
> {{E0802 14:09:37.063 [RedirectMonitor STARTING,
> GuavaUtils$LifecycleShutdownListener] Service: RedirectMonitor [FAILED]
> failed unexpectedly. Triggering shutdown.}}
> Leading to every scheduler showing the following:
> {{W0802 14:16:34.646 [qtp576711849-43, LeaderRedirect] No serviceGroupMonitor
> in host set, will not redirect despite not being leader.}}
> Once the scheduler enters this state, it is unable to snap out of it until it
> is manually restarted.
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