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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9525) "Move" region right after a region split is dangerous
Date Tue, 17 Sep 2013 03:20:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13769148#comment-13769148
] 

Hudson commented on HBASE-9525:
-------------------------------

FAILURE: Integrated in hbase-0.96 #57 (See [https://builds.apache.org/job/hbase-0.96/57/])
HBASE-9525 "Move" region right after a region split is dangerous (jxiang: rev 1523836)
* /hbase/branches/0.96/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
* /hbase/branches/0.96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionMergeTransactionOnCluster.java
* /hbase/branches/0.96/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransactionOnCluster.java

                
> "Move" region right after a region split is dangerous
> -----------------------------------------------------
>
>                 Key: HBASE-9525
>                 URL: https://issues.apache.org/jira/browse/HBASE-9525
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Jimmy Xiang
>             Fix For: 0.98.0, 0.96.0
>
>         Attachments: logs.txt, trunk-9525.patch
>
>
> I ran into a situation where the CM issued a move for a region just after a region was
split. The master went bonkers since the master honored the CM request, and assigned the split
region, but subsequently all the region state assumptions on this (split)region was messed
up. I started seeing log lines lines like "THIS SHOULD NOT HAPPEN". Also, it created other
problems - a compaction on original region happened on the new assignee, and then the daughter
regions started seeing issues to do with store files missing, etc., etc. 
> I will upload the logs shortly.

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