[jira] [Closed] (HBASE-6227) SSH and cluster startup causes data loss

["Lars Hofhansl (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-6227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lars Hofhansl closed HBASE-6227.
--------------------------------

    
> SSH and cluster startup  causes data loss
> -----------------------------------------
>
>                 Key: HBASE-6227
>                 URL: https://issues.apache.org/jira/browse/HBASE-6227
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>             Fix For: 0.94.1, 0.96.0
>
>         Attachments: HBASE-6227.patch, HBASE-6227v2-94.patch, HBASE-6227v2.patch
>
>
> In AssignmentManager#processDeadServersAndRegionsInTransition, if servershutdownhandler is processing and master consider it cluster startup, master will assign all user regions, however, servershutdownhandler has not completed splitting logs.
> Let me describe it in more detail.
> Suppose there are two regionservers A1 and B1, A1 carried META and ROOT
> 1.master restart and completed assignRootAndMeta
> 2.A1 and B1 are both restarted, new regionservers are A2 and B2
> 3.SSH which processed for A1 completed assigning ROOT and META
> 4.master do rebuilding user regions and no regions added to master's region list
> 5.master consider it as a cluster startup, and assign all user regions
> 6.SSH which processed for B1 start to split B1's logs
> 7.All regions' data carried by B1 would loss.

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