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HBase, mail # user - Region Server not starting


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RE: Region Server not starting
Vladimir Rodionov 2013-11-08, 18:56
Cleaning up Zookeeper  store should resolve this. Its quick but not 100% safe. The right way is to launch  Zk CLI and manually check and verify all HBase related nodes
By default, its under /HBASE_TMP_DIR/zookeeper or if you have specified it explicitly - check hbase.zookeeper.property.dataDir in hbase-site.xml
Best regards,
Vladimir Rodionov
Principal Platform Engineer
Carrier IQ, www.carrieriq.com
e-mail: [EMAIL PROTECTED]

________________________________________
From: Suresh V S [[EMAIL PROTECTED]]
Sent: Friday, November 08, 2013 12:31 AM
To: [EMAIL PROTECTED]
Subject: Region Server not starting

Dear all,

I had to change the IP address of a hbase region server in the cluster.  After effecting the IP change, all services in cluster came up fine, but for the region server on this node.

Kindly advise how to solve this problem.

The log on the region server with the error portion is as below:

2013-11-08 13:41:13,780 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Waiting for Large Compaction Thread to finish...
2013-11-08 13:41:13,780 DEBUG org.apache.hadoop.hbase.regionserver.CompactSplitThread: Waiting for Small Compaction Thread to finish...
2013-11-08 13:41:13,795 WARN org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper: Node /hbase/rs/harry,60020,1383898273175 already deleted, and this is not a retry
2013-11-08 13:41:13,795 WARN org.apache.hadoop.hbase.regionserver.HRegionServer: Failed deleting my ephemeral node
org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /hbase/rs/harry,60020,1383898273175
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:873)
        at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.delete(RecoverableZooKeeper.java:127)
        at org.apache.hadoop.hbase.zookeeper.ZKUtil.deleteNode(ZKUtil.java:974)
        at org.apache.hadoop.hbase.zookeeper.ZKUtil.deleteNode(ZKUtil.java:963)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.deleteMyEphemeralNode(HRegionServer.java:1037)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:815)
        at java.lang.Thread.run(Thread.java:662)
2013-11-08 13:41:13,812 INFO org.apache.zookeeper.ZooKeeper: Session: 0x14231e9cc68000c closed
2013-11-08 13:41:13,812 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down
2013-11-08 13:41:13,812 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: stopping server null; zookeeper connection closed.
2013-11-08 13:41:13,813 INFO org.apache.hadoop.hbase.regionserver.HRegionServer: regionserver60020 exiting
2013-11-08 13:41:13,813 INFO org.apache.hadoop.hbase.regionserver.ShutdownHook: Shutdown hook starting; hbase.shutdown.hook=true; fsShutdownHook=org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@225f1ae9<mailto:fsShutdownHook=org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer@225f1ae9>

Suresh.

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