[replication] NPE in ReplicationSource when ZK is gone
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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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