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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2515) ChangeTableState considers split&&offline regions as being served
Date Wed, 05 May 2010 03:16:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12864127#action_12864127
] 

stack commented on HBASE-2515:
------------------------------

I saw the description.  What I want to know is why this doesn't happen always on every split.
 What is different that manufactures the lines pasted?  You don't explain.

> ChangeTableState considers split&&offline regions as being served
> -----------------------------------------------------------------
>
>                 Key: HBASE-2515
>                 URL: https://issues.apache.org/jira/browse/HBASE-2515
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>            Priority: Critical
>             Fix For: 0.20.5, 0.21.0
>
>
> A region is considered as being serverd and unserved at the same time in the ChangeTableState
(and TableOperation) class. This translates to logs like this:
> {code}
> 2010-05-04 17:26:01,073 INFO org.apache.hadoop.hbase.master.ServerManager: Processing
MSG_REPORT_SPLIT_INCLUDES_DAUGHTERS: TestTable,0000518811,1273019008135: Daughters; 
> TestTable,0000518811,1273019159867, TestTable,0000584541,1273019159867 from 10.10.1.177,60020,1273018776034;
1 of 1
> <<disable is called>>
> 2010-05-04 17:26:25,893 DEBUG org.apache.hadoop.hbase.master.ChangeTableState: Skipping
region REGION => {NAME => 'TestTable,0000518811,1273019008135', STARTKEY => '0000518811',
ENDKEY => '0000650817', 
> ENCODED => 143183187, OFFLINE => true, SPLIT => true, TABLE => {{NAME =>
'TestTable', FAMILIES => [{NAME => 'info', VERSIONS => '3', COMPRESSION => 'NONE',
TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 
> 'false', BLOCKCACHE => 'true'}]}} because it is offline and split
> 2010-05-04 17:26:25,902 DEBUG org.apache.hadoop.hbase.master.ChangeTableState: Adding
region TestTable,0000518811,1273019008135 to setClosing list
> 2010-05-04 17:26:27,008 DEBUG org.apache.hadoop.hbase.master.ChangeTableState: Skipping
region REGION => {NAME => 'TestTable,0000518811,1273019008135', STARTKEY => '0000518811',
ENDKEY => '0000650817', 
> ENCODED => 143183187, OFFLINE => true, SPLIT => true, TABLE => {{NAME =>
'TestTable', FAMILIES => [{NAME => 'info', VERSIONS => '3', COMPRESSION => 'NONE',
TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY =>
>  'false', BLOCKCACHE => 'true'}]}} because it is offline and split
> 2010-05-04 17:26:27,018 DEBUG org.apache.hadoop.hbase.master.ChangeTableState: Adding
region TestTable,0000518811,1273019008135 to setClosing list
> {code}
> The region gets stuck in transition! More details in a comment to come.

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