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Date: Wed, 8 Mar 2017 23:50:38 +0000 (UTC)
From: "Esteban Gutierrez (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Updated] (HBASE-15941) HBCK repair should not unsplit
 healthy splitted region
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archived-at: Wed, 08 Mar 2017 23:50:43 -0000


     [ https://issues.apache.org/jira/browse/HBASE-15941?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Esteban Gutierrez updated HBASE-15941:
--------------------------------------
    Release Note: A new option -removeParents is now available that will remove an old parent when two valid daughters for that parent exist and -fixHdfsOverlaps is used. If there is an issue trying to remove the parent from META or sidelining the parent from HDFS we will fallback to do a regular merge. For now this option only works when the overlap group consists only of 3 regions (a parent, daughter A and daughter B)

> HBCK repair should not unsplit healthy splitted region
> ------------------------------------------------------
>
>                 Key: HBASE-15941
>                 URL: https://issues.apache.org/jira/browse/HBASE-15941
>             Project: HBase
>          Issue Type: Improvement
>          Components: hbck
>    Affects Versions: 1.0.0
>            Reporter: Stephen Yuan Jiang
>            Assignee: Esteban Gutierrez
>         Attachments: HBASE-15941.master.001.patch, HBASE-15941.master.001.patch, HBASE-15941.master.002.patch
>
>
> Currently HBCK design in branch-1 has a flaw when repair option (the -fixHdfsOverlaps option specifically) is specified: it would wrongly merge split region (by looking at HDFS, it thinks that there exists overlapped regions - parent region and daughter regions covers the same key range, of course).  See HBASE-15940 for details.  
> This JIRA tracks the improvement not-to-merge split region in HBCK repair.


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