Sergey Shelukhin created HBASE-7701:
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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 =>
'IntegrationTestRebalanceAndKillServersTargeted,66666660,1358906196709.0200b366bc37c5afd1185f7d487c7dfb.',
STARTKEY => '66666660', ENDKEY => '7333332c',
ENCODED => 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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