A region's state is kept in several places in the master opening the
possibility for race conditions
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Key: HBASE-543
URL: https://issues.apache.org/jira/browse/HBASE-543
Project: Hadoop HBase
Issue Type: Bug
Components: master
Affects Versions: 0.2.0
Reporter: Jim Kellerman
Assignee: Jim Kellerman
Fix For: 0.2.0
A region's state exists in multiple maps in the RegionManager:
unassignedRegions, pendingRegions, regionsToClose, closingRegions,
regionsToDelete, etc.
One of these race conditions was found in HBASE-534.
Proposed solution:
Create a class that encapsulates a region's state and provide synchronized
access to the class that validates state changes.
There should be a single structure that holds regions in these transitional
states and it should be a synchronized collection of some kind.
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