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https://issues.apache.org/jira/browse/HBASE-2515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12864129#action_12864129
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Jean-Daniel Cryans commented on HBASE-2515:
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This happens on disable, not split (since this is called by ChangeTableState).
An easy way of getting the error is running PE to get some splits and, before
the master deletes the parent, run a disable.
> 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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