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https://issues.apache.org/jira/browse/HBASE-1104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660165#action_12660165
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stack commented on HBASE-1104:
------------------------------
Seems pretty easy to reproduce here on my end. I don't see any change in the
new state transition code other than improved logging and addition of setting
closing to false inside in setClose.
> 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
> Fix For: 0.19.0
>
>
> 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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