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https://issues.apache.org/jira/browse/HBASE-2441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12875953#action_12875953
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Todd Lipcon commented on HBASE-2441:
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I'm going to be stubborn and try to write a test for this even though you +1ed
:) Hopefully will do so this week.
These issues are so rare to reproduce "in the wild" that I think it's
especially important to have targeted tests.
Otherwise it's quite likely we'll regress them down the road.
> ZK failures early in RS startup sequence cause infinite busy loop
> -----------------------------------------------------------------
>
> Key: HBASE-2441
> URL: https://issues.apache.org/jira/browse/HBASE-2441
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.20.3
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.21.0
>
> Attachments: hbase-2441.txt
>
>
> If the RS loses its ZK session before it reports for duty, the abort() call
> will trigger an NPE, and then the stop boolean doesn't get toggled. The RS
> will then loop forever trying to register itself in the expired ZK session,
> and fill up the logs.
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