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Posted to issues@hbase.apache.org by "Zhihong Yu (Updated) (JIRA)" <ji...@apache.org> on 2012/01/12 18:17:40 UTC
[jira] [Updated] (HBASE-5179) Concurrent processing of
processFaileOver and ServerShutdownHandler may cause region to be assigned
before log splitting is completed, causing data loss
[ https://issues.apache.org/jira/browse/HBASE-5179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zhihong Yu updated HBASE-5179:
------------------------------
Hadoop Flags: Reviewed
Summary: Concurrent processing of processFaileOver and ServerShutdownHandler may cause region to be assigned before log splitting is completed, causing data loss (was: Concurrent processing of processFaileOver and ServerShutdownHandler may cause region is assigned before completing split log, it would cause data loss)
> Concurrent processing of processFaileOver and ServerShutdownHandler may cause region to be assigned before log splitting is completed, causing 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
> Attachments: 5179-90.txt, 5179-90v2.patch, 5179-90v3.patch, 5179-v2.txt, 5179-v3.txt, 5179-v4.txt, hbase-5179.patch, hbase-5179v5.patch
>
>
> If master's processing its failover and ServerShutdownHandler's processing happen concurrently, it may appear following case.
> 1.master completed 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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