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https://issues.apache.org/jira/browse/HBASE-4122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13093416#comment-13093416
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Jonathan Hsieh commented on HBASE-4122:
---------------------------------------
I've noticed several "backwards" regions in a meta that I'm trying to restore
that had the check_meta.rb script applied to it. I have a feeling that the
hole detection algorithm that just keeps the previous region range may be too
simple - and that the "backwards" hole may be caused by a recovery that misses
a case.
Let's say the table has the following regions
Start -> End
A->B
A->C
B->C
I've noticed some cases where newly added regions look like this:
C->B
B->A
My guess is that a further attempt to clean this up may cause more problems.
> improve hbck tool to fix .META. hole issue.
> -------------------------------------------
>
> Key: HBASE-4122
> URL: https://issues.apache.org/jira/browse/HBASE-4122
> Project: HBase
> Issue Type: Improvement
> Reporter: feng xu
> Fix For: 0.94.0
>
> Attachments: HBASE-4122.patch, check_meta.rb
>
>
> hbase hbck tool can check the META hole, but it can not fix this problem by
> --fix.
> I plan to improve the tool.
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