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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4045) [replication] NPE in ReplicationSource when ZK is gone
Date Wed, 29 Jun 2011 22:55:28 GMT
[replication] NPE in ReplicationSource when ZK is gone
------------------------------------------------------

                 Key: HBASE-4045
                 URL: https://issues.apache.org/jira/browse/HBASE-4045
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.90.3
            Reporter: Jean-Daniel Cryans
            Assignee: Jean-Daniel Cryans
            Priority: Minor
             Fix For: 0.90.4


We got this in production, it killed the replication thread but the server itself was fine
and the master kept the logs:

{quote}
2011-06-26 16:02:56,092 INFO org.apache.zookeeper.ClientCnxn: Client session timed out, have
not heard from server in 26667ms for sessionid 0x22f9dcb30ab01b8, closing socket connection
and attempting reconnect
2011-06-26 16:02:56,213 DEBUG org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher: connection
to cluster: 5-0x22f9dcb30ab01b8-0x22f9dcb30ab01b8 Received ZooKeeper Event, type=None, state=Disconnected,
path=null
2011-06-26 16:02:56,213 DEBUG org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher: connection
to cluster: 5-0x22f9dcb30ab01b8-0x22f9dcb30ab01b8 Received Disconnected from ZooKeeper, ignoring
2011-06-26 16:02:56,213 WARN org.apache.hadoop.hbase.replication.ReplicationZookeeper: Cannot
get peer's region server addresses
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
for /hbase/rs
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
        at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1243)
        at org.apache.hadoop.hbase.zookeeper.ZKUtil.listChildrenNoWatch(ZKUtil.java:389)
        at org.apache.hadoop.hbase.zookeeper.ZKUtil.listChildrenAndGetAsAddresses(ZKUtil.java:355)
        at org.apache.hadoop.hbase.replication.ReplicationZookeeper.fetchSlavesAddresses(ReplicationZookeeper.java:228)
        at org.apache.hadoop.hbase.replication.ReplicationZookeeper.getSlavesAddresses(ReplicationZookeeper.java:216)
        at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.chooseSinks(ReplicationSource.java:205)
        at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.shipEdits(ReplicationSource.java:588)
        at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:341)2011-06-26
16:02:56,222 ERROR org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Closing
source 5 because an error occurred: Uncaught exception during runtime
java.lang.Exception: java.lang.NullPointerException
        at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource$1.uncaughtException(ReplicationSource.java:628)
        at java.lang.Thread.dispatchUncaughtException(Thread.java:1874)Caused by: java.lang.NullPointerException
        at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.chooseSinks(ReplicationSource.java:208)
        at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.shipEdits(ReplicationSource.java:588)
        at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:341)

{quote}

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