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https://issues.apache.org/jira/browse/HBASE-4124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13070103#comment-13070103
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stack commented on HBASE-4124:
------------------------------
hbase-3741 changes the behavior here in that now we notice if we are asked to
open a region that is already open and we'll throw an exception back to the
master. I think the master will now reassign it elsewhere which is not what we
want if its a RegionAlreadyInTransitionException. This will make it so we'll
not keep retrying but I think there is more to do.
> ZK restarted while assigning a region, new active HM re-assign it but the RS
> warned 'already online on this server'.
> --------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-4124
> URL: https://issues.apache.org/jira/browse/HBASE-4124
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: fulin wang
> Attachments: log.txt
>
> Original Estimate: 0.4h
> Remaining Estimate: 0.4h
>
> ZK restarted while assigning a region, new active HM re-assign it but the RS
> warned 'already online on this server'.
> Issue:
> The RS failed besause of 'already online on this server' and return; The HM
> can not receive the message and report 'Regions in transition timed out'.
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