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From "Phabricator (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5344) [89-fb] Scan unassigned region directory on master failover
Date Tue, 14 Feb 2012 21:34:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13208029#comment-13208029
] 

Phabricator commented on HBASE-5344:
------------------------------------

mbautin has commented on the revision "[jira] [HBASE-5344] [89-fb] Scan unassigned region
directory on master failover".

  @stack: I am working on a new patch that would avoid directly taking to all RSs and will
focus on the state in ZK. It will also assign ROOT and META out-of-band if they are not online.

REVISION DETAIL
  https://reviews.facebook.net/D1605

                
> [89-fb] Scan unassigned region directory on master failover
> -----------------------------------------------------------
>
>                 Key: HBASE-5344
>                 URL: https://issues.apache.org/jira/browse/HBASE-5344
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Mikhail Bautin
>            Assignee: Mikhail Bautin
>         Attachments: D1605.1.patch
>
>
> In case the master dies after a regionserver writes region state as OPENED or CLOSED
in ZK but before the update is received by master and written to meta, the new master that
comes up has to pick up the region state from ZK and write it to meta. Otherwise we can get
multiply-assigned regions.

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