[jira] [Updated] (HBASE-5179) Concurrent processing of processFaileOver and ServerShutdownHandler may cause region is assigned before completing split log, it would cause data loss

["chunhui shen (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-5179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

chunhui shen updated HBASE-5179:
--------------------------------

    Affects Version/s: 0.90.2
    
> 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
>    Affects Versions: 0.90.2
>            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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