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Date: Mon, 15 Dec 2014 22:25:14 +0000 (UTC)
From: "Andrew Purtell (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12761662.1418603190000.27893.1418682314270@Atlassian.JIRA>
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Subject: [jira] [Commented] (HBASE-12686) Failures in split before PONR not
 clearing the daughter regions from regions in transition during rollback
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    [ https://issues.apache.org/jira/browse/HBASE-12686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14247342#comment-14247342 ] 

Andrew Purtell commented on HBASE-12686:
----------------------------------------

Given the conditional is

{{rs.isOnServer(serverName) && (rs.isOpened() || rs.isSplitting())}}

is it possible to be processing a region that is not splitting? In which case we have missing null checks, or test again rs.isSplitting():
{code}
1333	                  HRegionInfo hri_a = splitRegions.get(regionInfo).getFirst();
1334	                  HRegionInfo hri_b = splitRegions.get(regionInfo).getSecond();
{code}

> Failures in split before PONR not clearing the daughter regions from regions in transition during rollback
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-12686
>                 URL: https://issues.apache.org/jira/browse/HBASE-12686
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>    Affects Versions: 0.98.9
>            Reporter: Rajeshbabu Chintaguntla
>            Assignee: Vandana Ayyalasomayajula
>            Priority: Blocker
>             Fix For: 1.0.0, 0.98.9
>
>         Attachments: HBASE-12686-98.patch, HBASE-12686-branch-1.1.patch, HBASE-12686-branch-1.patch
>
>
> If there are any split failures then the both daughter regions left in SPLITTING_NEW transition even after rollback, which will block balancing to happen forever until unless master is restarted.


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