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From "chunhui shen (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-5179) Concurrent processing of processFaileOver and ServerShutdownHandler may cause region is assigned before completing split log, it would cause data loss
Date Wed, 11 Jan 2012 06:54:39 GMT
Concurrent processing of processFaileOver and ServerShutdownHandler  may cause region is assigned
before completing split log, it would cause data loss
-------------------------------------------------------------------------------------------------------------------------------------------------------

                 Key: HBASE-5179
                 URL: https://issues.apache.org/jira/browse/HBASE-5179
             Project: HBase
          Issue Type: Bug
          Components: master
            Reporter: chunhui shen
            Assignee: chunhui shen


If master's processing its failover and ServerShutdownHandler's processing happen concurrently,
it may appear following  case.
1.master completing splitLogAfterStartup()
2.RegionserverA restarts, and ServerShutdownHandler is processing.
3.master starts to rebuildUserRegions, and RegionserverA is considered as dead server.
4.master starts to assign regions of RegionserverA because it is a dead server by step3.

However, when doing step4(assigning region), ServerShutdownHandler may be doing split log,
Therefore, it may cause data loss.

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