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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2758) META region stuck in RS2ZK_REGION_OPENED state
Date Mon, 21 Jun 2010 04:17:23 GMT
META region stuck in RS2ZK_REGION_OPENED state
----------------------------------------------

                 Key: HBASE-2758
                 URL: https://issues.apache.org/jira/browse/HBASE-2758
             Project: HBase
          Issue Type: Bug
          Components: master, regionserver
    Affects Versions: 0.21.0
            Reporter: Todd Lipcon
            Priority: Blocker


In cluster testing trunk, I ended up with a situation where META was unassigned and no amount
of restarting various pieces would fix it. On master startup, I see:

2010-06-20 21:08:05,431 DEBUG org.apache.hadoop.hbase.master.BaseScanner: Current assignment
of .META.,,1.1028785192 is not valid;  serverAddress=, startCode=0 unknown.
2010-06-20 21:08:05,436 DEBUG org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: While creating
UNASSIGNED region 1028785192 exists, state = RS2ZK_REGION_OPENED
2010-06-20 21:08:05,438 WARN org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: <monster01.sf.cloudera.com:/hbase,org.apache.hadoop.hbase.master.HMaster>Failed
to create ZNode /hbase/UNASSIGNED/1028785192 in ZooKeeper
org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = NodeExists for
/hbase/UNASSIGNED/1028785192
2010-06-20 21:08:05,438 DEBUG org.apache.hadoop.hbase.master.RegionManager: Created UNASSIGNED
zNode .META.,,1.1028785192 in state M2ZK_REGION_OFFLINE

then on the RS:
2010-06-20 21:08:05,899 ERROR org.apache.hadoop.hbase.regionserver.RSZookeeperUpdater: ZNode
/hbase/UNASSIGNED/1028785192 is not in CLOSED/OFFLINE state (state = RS2ZK_REGION_OPENED),
will NOT open region.
2010-06-20 21:08:05,899 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Error opening
.META.,,1.1028785192
java.io.IOException: ZNode /hbase/UNASSIGNED/1028785192 is not in CLOSED/OFFLINE state (state
= RS2ZK_REGION_OPENED), will NOT open region.

and the region never opens


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