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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1104) Doubly-assigned regions redux
Date Thu, 08 Jan 2009 05:24:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12661844#action_12661844
] 

stack commented on HBASE-1104:
------------------------------

Other comments, I like the clean up of state namings.  Much clearer now whats going on (Was
super confusing before -- now I'll have a chance at grokking whats going on).  Also, I liked
removal of passing RegionManager when its accessible off the Master.  Good cleanup.

> Doubly-assigned regions redux
> -----------------------------
>
>                 Key: HBASE-1104
>                 URL: https://issues.apache.org/jira/browse/HBASE-1104
>             Project: Hadoop HBase
>          Issue Type: Bug
>         Environment: pset cluster with TRUNK.
>            Reporter: stack
>            Assignee: Jim Kellerman
>             Fix For: 0.19.0
>
>         Attachments: 1104.patch
>
>
> Testing, I see doubly assigned regions.  Below is from master log for TestTable,0000135598,1230761605500.
> {code}
> 2008-12-31 22:13:35,528 [IPC Server handler 2 on 60000] INFO org.apache.hadoop.hbase.master.ServerManager:
Received MSG_REPORT_SPLIT: TestTable,0000116170,1230761152219: TestTable,0000116170,1230761152219
split; daughters: TestTable,0000116170,1230761605500, TestTable,0000135598,1230761605500 from
XX.XX.XX.142:60020
> 2008-12-31 22:13:35,528 [IPC Server handler 2 on 60000] INFO org.apache.hadoop.hbase.master.RegionManager:
assigning region TestTable,0000135598,1230761605500 to server XX.XX.XX.142:60020
> 2008-12-31 22:13:38,561 [IPC Server handler 6 on 60000] INFO org.apache.hadoop.hbase.master.ServerManager:
Received MSG_REPORT_OPEN: TestTable,0000135598,1230761605500 from XX.XX.XX.142:60020
> 2008-12-31 22:13:38,562 [HMaster] INFO org.apache.hadoop.hbase.master.ProcessRegionOpen$1:
TestTable,0000135598,1230761605500 open on XX.XX.XX.142:60020
> 2008-12-31 22:13:38,562 [HMaster] INFO org.apache.hadoop.hbase.master.ProcessRegionOpen$1:
updating row TestTable,0000135598,1230761605500 in region .META.,,1 with startcode 1230759988953
and server XX.XX.XX.142:60020
> 2008-12-31 22:13:44,640 [IPC Server handler 4 on 60000] DEBUG org.apache.hadoop.hbase.master.RegionManager:
Going to close region TestTable,0000135598,1230761605500
> 2008-12-31 22:13:50,441 [IPC Server handler 9 on 60000] INFO org.apache.hadoop.hbase.master.RegionManager:
assigning region TestTable,0000135598,1230761605500 to server XX.XX.XX.139:60020
> 2008-12-31 22:13:53,457 [IPC Server handler 5 on 60000] INFO org.apache.hadoop.hbase.master.ServerManager:
Received MSG_REPORT_PROCESS_OPEN: TestTable,0000135598,1230761605500 from XX.XX.XX.139:60020
> 2008-12-31 22:13:53,458 [IPC Server handler 5 on 60000] INFO org.apache.hadoop.hbase.master.ServerManager:
Received MSG_REPORT_OPEN: TestTable,0000135598,1230761605500 from XX.XX.XX.139:60020
> 2008-12-31 22:13:53,458 [HMaster] INFO org.apache.hadoop.hbase.master.ProcessRegionOpen$1:
TestTable,0000135598,1230761605500 open on XX.XX.XX.139:60020
> 2008-12-31 22:13:53,458 [HMaster] INFO org.apache.hadoop.hbase.master.ProcessRegionOpen$1:
updating row TestTable,0000135598,1230761605500 in region .META.,,1 with startcode 1230759988788
and server XX.XX.XX.139:60020
> 2008-12-31 22:13:53,688 [IPC Server handler 6 on 60000] INFO org.apache.hadoop.hbase.master.ServerManager:
Received MSG_REPORT_CLOSE: TestTable,0000135598,1230761605500 from XX.XX.XX.142:60020
> 2008-12-31 22:13:53,688 [HMaster] DEBUG org.apache.hadoop.hbase.master.HMaster: Processing
todo: ProcessRegionClose of TestTable,0000135598,1230761605500, false
> 2008-12-31 22:13:54,263 [IPC Server handler 7 on 60000] INFO org.apache.hadoop.hbase.master.RegionManager:
assigning region TestTable,0000135598,1230761605500 to server XX.XX.XX.141:60020
> 2008-12-31 22:13:57,273 [IPC Server handler 9 on 60000] INFO org.apache.hadoop.hbase.master.ServerManager:
Received MSG_REPORT_PROCESS_OPEN: TestTable,0000135598,1230761605500 from XX.XX.XX.141:60020
> 2008-12-31 22:14:03,917 [IPC Server handler 0 on 60000] INFO org.apache.hadoop.hbase.master.ServerManager:
Received MSG_REPORT_OPEN: TestTable,0000135598,1230761605500 from XX.XX.XX.141:60020
> 2008-12-31 22:14:03,917 [HMaster] INFO org.apache.hadoop.hbase.master.ProcessRegionOpen$1:
TestTable,0000135598,1230761605500 open on XX.XX.XX.141:60020
> 2008-12-31 22:14:03,918 [HMaster] INFO org.apache.hadoop.hbase.master.ProcessRegionOpen$1:
updating row TestTable,0000135598,1230761605500 in region .META.,,1 with startcode 1230759989031
and server XX.XX.XX.141:60020
> 2008-12-31 22:14:29,350 [RegionManager.metaScanner] DEBUG org.apache.hadoop.hbase.master.BaseScanner:
TestTable,0000135598,1230761605500 no longer has references to TestTable,0000116170,1230761152219
> {code}
> See how we choose to assign before we get the close back from the regionserver.

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