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https://issues.apache.org/jira/browse/HBASE-7103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492012#comment-13492012
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Matt Corgan commented on HBASE-7103:
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I disabled my custom balancer (external java program that calls
HBaseAdmin.move()) and it's been working without error for longer than usual.
I've been using the same balancer since .90 series I think, so possibly
something changed where calling move() on a new daughter region soon after a
split leaves ZK in a bad state.
> Need to fail split if SPLIT znode is deleted even before the split is
> completed.
> --------------------------------------------------------------------------------
>
> Key: HBASE-7103
> URL: https://issues.apache.org/jira/browse/HBASE-7103
> Project: HBase
> Issue Type: Bug
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 0.94.3, 0.96.0
>
>
> This came up after the following mail in dev list
> 'infinite loop of RS_ZK_REGION_SPLIT on .94.2'.
> The following is the reason for the problem
> The following steps happen
> -> Initially the parent region P1 starts splitting.
> -> The split is going on normally.
> -> Another split starts at the same time for the same region P1. (Not sure
> why this started).
> -> Rollback happens seeing an already existing node.
> -> This node gets deleted in rollback and nodeDeleted Event starts.
> -> In nodeDeleted event the RIT for the region P1 gets deleted.
> -> Because of this there is no region in RIT.
> -> Now the first split gets over. Here the problem is we try to transit the
> node to SPLITTING to SPLIT. But the node even does not exist.
> But we don take any action on this. We think it is successful.
> -> Because of this SplitRegionHandler never gets invoked.
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