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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-3172) Reverse order of AssignmentManager and MetaNodeTracker in ZooKeeperWatcher
Date Fri, 29 Oct 2010 19:22:24 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3172?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Gray updated HBASE-3172:
---------------------------------

    Status: Patch Available  (was: Open)

Stack, please review when u have a sec.

> 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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