Devaraj Das created HBASE-7161:
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Summary: Table does not come out of 'enabling' state
Key: HBASE-7161
URL: https://issues.apache.org/jira/browse/HBASE-7161
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.2
Reporter: Devaraj Das
I was running a test, and the test failed because a table didn't get 'enabled'
in the timeframe the test expected. When I checked the state of the table on
ZK, it showed the state as 'enabling'.
When I dug up the master logs, found that the BulkAssigner.bulkAssign returned
false (the first line in the logs below), and the table never became 'enabled'.
There was one region which could not be opened in the time bulkAssign ran (and
that got 'opened' after the bulkAssign method returned). Also the table could
not be enabled later on (from the hbase shell, for example), since the state of
the table on ZK was 'enabling' (as opposed to 'disabled' and the table-state
checks would fail).
{noformat}
2012-11-13 06:41:27,257 INFO
org.apache.hadoop.hbase.master.handler.EnableTableHandler: Enabled table is
done=false
2012-11-13 06:41:49,569 DEBUG org.apache.hadoop.hbase.master.AssignmentManager:
Handling transition=RS_ZK_REGION_OPENING,
server=hrt20n32.foo.net,60020,1352782575357,
region=0c0f9c71a81112f07c8f0ea130a65d05
2012-11-13 06:41:49,579 DEBUG org.apache.hadoop.hbase.master.AssignmentManager:
Handling transition=RS_ZK_REGION_OPENING,
server=hrt20n32.foo.net,60020,1352782575357,
region=0c0f9c71a81112f07c8f0ea130a65d05
2012-11-13 06:41:49,586 DEBUG org.apache.hadoop.hbase.master.AssignmentManager:
Handling transition=RS_ZK_REGION_OPENED,
server=hrt20n32.foo.net,60020,1352782575357,
region=0c0f9c71a81112f07c8f0ea130a65d05
2012-11-13 06:41:49,586 DEBUG
org.apache.hadoop.hbase.master.handler.OpenedRegionHandler: Handling OPENED
event for loadtest_d1,44444444,1352788441221.0c0f9c71a81112f07c8f0ea130a65d05.
from hrt20n32.foo.net,60020,1352782575357; deleting unassigned node
2012-11-13 06:41:49,586 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
master:60000-0x13af81eec6f0004 Deleting existing unassigned node for
0c0f9c71a81112f07c8f0ea130a65d05 that is in expected state RS_ZK_REGION_OPENED
2012-11-13 06:41:49,589 DEBUG org.apache.hadoop.hbase.master.AssignmentManager:
The znode of region
loadtest_d1,44444444,1352788441221.0c0f9c71a81112f07c8f0ea130a65d05. has been
deleted.
2012-11-13 06:41:49,589 INFO org.apache.hadoop.hbase.master.AssignmentManager:
The master has opened the region
loadtest_d1,44444444,1352788441221.0c0f9c71a81112f07c8f0ea130a65d05. that was
online on hrt20n32.foo.net,60020,1352782575357
{noformat}
The client (that invoked HBA.enableTable) gave up eventually (enableTable
invokes isTableEnabled in a loop and in this case it was always returning
false).
The handling on the master side for regions that take longer to get 'opened'
can be improved.
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