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https://issues.apache.org/jira/browse/HBASE-3172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926463#action_12926463
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stack commented on HBASE-3172:
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+1
> Reverse order of AssignmentManager and MetaNodeTracker in ZooKeeperWatcher
> --------------------------------------------------------------------------
>
> Key: HBASE-3172
> URL: https://issues.apache.org/jira/browse/HBASE-3172
> Project: HBase
> Issue Type: Bug
> Components: master, zookeeper
> Affects Versions: 0.90.0
> Reporter: Jonathan Gray
> Assignee: Jonathan Gray
> Priority: Critical
> Fix For: 0.90.0
>
> Attachments: HBASE-3172-v1.patch
>
>
> Over in HBASE-3159, I reported a similar double-opened issue but for META.
> This is because of the fact that the META unassigned znode has two different
> consumers {{MetaNodeTracker}} in use by the CatalogTracker and
> {{AssignmentManager}} which uses it for normal regions-in-transition stuff.
> The AssignmentManager needs to go first, otherwise we can get double handling
> of state transitions.
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