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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-7701) inconsistent state in AssignmentManager for moving region
Date Mon, 28 Jan 2013 23:47:13 GMT
Sergey Shelukhin created HBASE-7701:
---------------------------------------

             Summary: inconsistent state in AssignmentManager for moving region
                 Key: HBASE-7701
                 URL: https://issues.apache.org/jira/browse/HBASE-7701
             Project: HBase
          Issue Type: Bug
            Reporter: Sergey Shelukhin


Closed regions are not removed from assignments. I am not sure if it's a general state problem,
or just a small bug; for now, one manifestation is that moved region is ignored by SSH of
the target server if target server dies before updating ZK.

{code}
2013-01-22 17:59:00,524 DEBUG [IPC Server handler 3 on 50658] master.AssignmentManager(1475):
Sent CLOSE to 10.11.2.92,51231,1358906285048 for region IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.
2013-01-22 17:59:00,997 DEBUG [RS_CLOSE_REGION-10.11.2.92,51231,1358906285048-1] handler.CloseRegionHandler(167):
set region closed state in zk successfully for region IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.
sn name: 10.11.2.92,51231,1358906285048
2013-01-22 17:59:01,088 INFO  [MASTER_CLOSE_REGION-10.11.2.92,50658,1358906192673-0] master.RegionStates(242):
Region {NAME =&gt; &apos;IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.&apos;,
STARTKEY =&gt; &apos;66666660&apos;, ENDKEY =&gt; &apos;7333332c&apos;,
ENCODED =&gt; 0200b366bc37c5afd1185f7d487c7dfb,} transitioned from {IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.
state=CLOSED, ts=1358906341087, server=null} to {IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.
state=OFFLINE, ts=1358906341088, server=null}
2013-01-22 17:59:01,128 INFO  [MASTER_CLOSE_REGION-10.11.2.92,50658,1358906192673-0] master.AssignmentManager(1596):
Assigning region IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.
to 10.11.2.92,50661,1358906192942

... (50661 didn't update ZK to OPEN, only OPENING)

2013-01-22 17:59:06,605 INFO  [MASTER_SERVER_OPERATIONS-10.11.2.92,50658,1358906192673-2]
handler.ServerShutdownHandler(202): Reassigning 7 region(s) that 10.11.2.92,50661,1358906192942
was carrying (skipping 0 regions(s) that are already in transition)
2013-01-22 17:59:06,605 DEBUG [MASTER_SERVER_OPERATIONS-10.11.2.92,50658,1358906192673-2]
handler.ServerShutdownHandler(219): Skip assigning region IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.
because it has been opened in 10.11.2.92,51231,1358906285048
{code}

Note the server in the last line - the one that has long closed the region.

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