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From "Stephen Yuan Jiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15941) HBCK repair should not unsplit healthy splitted region
Date Thu, 09 Mar 2017 07:35:37 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15902613#comment-15902613

Stephen Yuan Jiang commented on HBASE-15941:

	    out.println("   -fixSplitParents  Try to force offline split parents to be online.");
            out.println("   -removeParents    Try to offline and sideline lingering parents
and keep daughter regions.");

We are getting too many options now.  I just wonder whether we should have this new option
or put logic in other options.  For example, maybe merge with -fixSplitParents option to either
force offline parent online or sideline lingering parents.  (I am not sure about this, as
I have not take a close look at this fixSplitParents code path.  I just feel HBCK already
has too many options today; my experience with customer is that they sometimes miss the right
option or sometimes they just simply use -repair to apply all options.)

> 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
>             Fix For: 2.0.0, 1.4.0, 1.3.1, 1.2.6
>         Attachments: HBASE-15941.branch-1.001.patch, HBASE-15941.master.001.patch, HBASE-15941.master.001.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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