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Hudson commented on HBASE-26383:
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Results for branch branch-2
        [build #371 on 
builds.a.o|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-2/371/]:
 (x) *{color:red}-1 overall{color}*
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(/) {color:green}+1 jdk8 hadoop2 checks{color}
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> HBCK incorrectly reports inconsistencies for recently split regions following 
> a master failover
> -----------------------------------------------------------------------------------------------
>
>                 Key: HBASE-26383
>                 URL: https://issues.apache.org/jira/browse/HBASE-26383
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 2.4.3
>            Reporter: Benoit Sigoure
>            Assignee: Andrew Kyle Purtell
>            Priority: Critical
>             Fix For: 2.5.0, 3.0.0-alpha-2, 2.4.8
>
>
> When a region P splits into A and B, following a master failover the newly 
> active master reports that P is in an inconsistent state. This seems to be a 
> regression introduced in HBASE-25847 (cc [[email protected]]) which 
> changed {{regionInfo.isParentSplit()}} to {{regionState.isSplit()}}. The 
> region state after restart is CLOSED (rather than SPLIT), so both region 
> state and region info should be checked, presumably with 
> {{regionState.isSplit() || regionInfo.isSplit()}}. This situation resolves 
> itself on its own when a major compaction occurs and P is GCed, but having 
> the master incorrectly report inconsistencies is pretty bad. We had a pretty 
> big outage due to a series of operator errors as our SRE team was trying to 
> fix this inconsistency that, in fact, didn't even exist.
> Thanks to Stack for helping look over this issue and Vlad Hanciuta for root 
> causing the bug.



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