[jira] [Updated] (HBASE-6228) Fixup daughters twice cause daughter region assigned twice

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

     [ https://issues.apache.org/jira/browse/HBASE-6228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

chunhui shen updated HBASE-6228:
--------------------------------

    Attachment: HBASE-6228.patch
    
> Fixup daughters twice  cause daughter region assigned twice
> -----------------------------------------------------------
>
>                 Key: HBASE-6228
>                 URL: https://issues.apache.org/jira/browse/HBASE-6228
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>         Attachments: HBASE-6228.patch
>
>
> First, how fixup daughters twice happen?
> 1.we will fixupDaughters at the last of HMaster#finishInitialization
> 2.ServerShutdownHandler will fixupDaughters when reassigning region through ServerShutdownHandler#processDeadRegion
> When fixupDaughters, we will added daughters to .META., but it coudn't prevent the above case, because FindDaughterVisitor.
> The detail is as the following:
> Suppose region A is a splitted parent region, and its daughter region B is missing
> 1.First, ServerShutdownHander thread fixup daughter, so add daughter region B to .META. with serverName=null, and assign the daughter.
> 2.Then, Master's initialization thread will also find the daughter region B is missing and assign it. It is because FindDaughterVisitor consider daughter is missing if its serverName=null

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira