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From Something Something <mailinglist...@gmail.com>
Subject HBase dies after some time
Date Sat, 26 May 2012 01:22:34 GMT
Hello,

I recently installed ZooKeeper & HBase on our dedicated Hadoop cluster on
EC2.  The HBase stays active for some time, but after a while it dies with
error messages similar to these:

2012-05-25 12:09:27,514 ERROR
org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher:
master:60000-0x5378489312c0004-0x5378489312c0004 Received unexpected
KeeperException, re-throwing exception
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase/master
        at
org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
        at
org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
        at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:927)
        at
org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAndWatch(ZKUtil.java:549)
        at
org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAsAddress(ZKUtil.java:620)
        at
org.apache.hadoop.hbase.master.ActiveMasterManager.stop(ActiveMasterManager.java:197)
        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:310)
2012-05-25 12:09:27,514 ERROR
org.apache.hadoop.hbase.master.ActiveMasterManager:
master:60000-0x5378489312c0004-0x5378489312c0004 Error deleting our own
master address node
org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase/master
        at
org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
        at
org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
        at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:927)
        at
org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAndWatch(ZKUtil.java:549)
        at
org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAsAddress(ZKUtil.java:620)
        at
org.apache.hadoop.hbase.master.ActiveMasterManager.stop(ActiveMasterManager.java:197)
        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:310)


This kills the HMaster as well as all HRegionServers.  Could it be that my
ZooKeeper setup is incorrect?  Please help.  Thanks.

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