[89-fb] Scan unassigned region directory on master failover
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                 Key: HBASE-5344
                 URL: https://issues.apache.org/jira/browse/HBASE-5344
             Project: HBase
          Issue Type: Bug
            Reporter: Mikhail Bautin
            Assignee: Mikhail Bautin


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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