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https://issues.apache.org/jira/browse/HBASE-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell resolved HBASE-3284.
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Resolution: Not A Problem
Yep and it doesn't seem to be an issue, so?
> In master when handling a split, the offline of parent and online of children
> is not done atomically
> ----------------------------------------------------------------------------------------------------
>
> Key: HBASE-3284
> URL: https://issues.apache.org/jira/browse/HBASE-3284
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.90.0
> Reporter: Jonathan Gray
>
> In AssignmentManager.handleSplitReport() we do:
> {noformat}
> regionOffline(parent);
> regionOnline(a, hsi);
> regionOnline(b, hsi);
> {noformat}
> Within each of these, there is locking, but there is no locking around this
> entire operation. There should be.
> This might be the cause of HBASE-3278
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