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From "Cosmin Lehene (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2731) HBase won't start due to NodeExistsException in Zookeeper based region assignment
Date Tue, 15 Jun 2010 14:23:23 GMT
HBase won't start due to NodeExistsException in Zookeeper based region assignment
---------------------------------------------------------------------------------

                 Key: HBASE-2731
                 URL: https://issues.apache.org/jira/browse/HBASE-2731
             Project: HBase
          Issue Type: Bug
          Components: master
    Affects Versions: 0.21.0
            Reporter: Cosmin Lehene
            Priority: Blocker
             Fix For: 0.21.0


We're getting zillions of these in HMaster when it starts assigning regions at startup and
it doesn't seem to progress.

{code}
2010-06-15 06:30:00,287 WARN org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: <org.apache.hadoop.hbase.master.HMaster>Failed
to create ZNode /hbase/UNASSIGNED/1766164500 in ZooKeeper^D
org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = NodeExists for
/hbase/UNASSIGNED/1766164500^D
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:110)^D
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)^D
        at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:637)^D
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.createZNodeIfNotExists(ZooKeeperWrapper.java:974)^D
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.createUnassignedRegion(ZooKeeperWrapper.java:1053)^D
        at org.apache.hadoop.hbase.master.RegionManager.doRegionAssignment(RegionManager.java:355)^D
        at org.apache.hadoop.hbase.master.RegionManager.assignRegions(RegionManager.java:312)^D
        at org.apache.hadoop.hbase.master.RegionManager.assignRegionsToMultipleServers(RegionManager.java:292)^D
        at org.apache.hadoop.hbase.master.RegionManager.assignRegions(RegionManager.java:221)^D
        at org.apache.hadoop.hbase.master.ServerManager.processMsgs(ServerManager.java:500)^D
        at org.apache.hadoop.hbase.master.ServerManager.processRegionServerAllsWell(ServerManager.java:425)^D
        at org.apache.hadoop.hbase.master.ServerManager.regionServerReport(ServerManager.java:335)^D
        at org.apache.hadoop.hbase.master.HMaster.regionServerReport(HMaster.java:700)^D
        at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)^D
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)^D
        at java.lang.reflect.Method.invoke(Method.java:597)^D
        at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:576)^D
        at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:919)

{code}

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