[jira] Commented: (HBASE-3284) In master when handling a split, the offline of parent and online of children is not done atomically

["Jonathan Gray (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12964945#action_12964945 ] 

Jonathan Gray commented on HBASE-3284:
--------------------------------------

I didn't target at 0.90 yet though I think we should fix this for 0.90.0.  Wanted to discuss first.  It might not be trivial to fix.

> 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
>             Fix For: 0.92.0
>
>
> 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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