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Date: Wed, 25 Apr 2012 18:24:23 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-5848) Create table with EMPTY_START_ROW
 passed as splitKey causes the HMaster to abort
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    [ https://issues.apache.org/jira/browse/HBASE-5848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13261897#comment-13261897 ] 

Hudson commented on HBASE-5848:
-------------------------------

Integrated in HBase-0.94-security #21 (See [https://builds.apache.org/job/HBase-0.94-security/21/])
    HBASE-5848 Addendum (Revision 1330106)

     Result = FAILURE
larsh : 
Files : 
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
* /hbase/branches/0.94/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java

                
> Create table with EMPTY_START_ROW passed as splitKey causes the HMaster to abort
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-5848
>                 URL: https://issues.apache.org/jira/browse/HBASE-5848
>             Project: HBase
>          Issue Type: Bug
>          Components: client
>            Reporter: Lars Hofhansl
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Minor
>             Fix For: 0.94.0, 0.96.0
>
>         Attachments: 5848-addendum-v2.txt, 5848-addendum-v3.txt, 5848-addendum-v4.txt, 5848-addendum-v5.txt, 5848-addendum-v6.txt, 5848-addendum-v7.txt, 5848-addendum-v7.txt, HBASE-5848.patch, HBASE-5848.patch, HBASE-5848_0.94.patch, HBASE-5848_addendum.patch
>
>
> A coworker of mine just had this scenario. It does not make sense the EMPTY_START_ROW as splitKey (since the region with the empty start key is implicit), but it should not cause the HMaster to abort.
> The abort happens because it tries to bulk assign the same region twice and then runs into race conditions with ZK.
> The same would (presumably) happen when two identical split keys are passed, but the client blocks that. The simplest solution here is to also block passed null or EMPTY_START_ROW as split key by the client.

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