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https://issues.apache.org/jira/browse/HBASE-1575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12728169#action_12728169
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stack commented on HBASE-1575:
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Patch looks good.
So, if cluster has only one master and master loses its lease in zk, previous,
it just stuck around as a zombie. Now it aborts. I suppose that'll drive home
the many-masters in a pretty effective way.
> HMaster does not handle ZK session expiration
> ---------------------------------------------
>
> Key: HBASE-1575
> URL: https://issues.apache.org/jira/browse/HBASE-1575
> Project: Hadoop HBase
> Issue Type: Bug
> Components: master
> Reporter: Jean-Daniel Cryans
> Assignee: Jean-Daniel Cryans
> Priority: Critical
> Fix For: 0.20.0
>
> Attachments: hbase-1575.patch
>
>
> Currently the master does nothing when he gets a KeeperState.Expired event
> from ZK. That means that a new master will be elected but the other will
> still be there doing weird stuff.
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