neha created HBASE-13901:
----------------------------
Summary: Error while calling watcher on creating and deleting an
HBase table
Key: HBASE-13901
URL: https://issues.apache.org/jira/browse/HBASE-13901
Project: HBase
Issue Type: Bug
Reporter: neha
Priority: Minor
[Scenario for Reproducing ] :
1. Create and delete 10 different HBase tables concurrently (10 threads
creating, disabling and deleting their own tables)
2. Check the HBase Master logs( Null Pointer Exceptions observed caused by data
race)
ERROR [main-EventThread] zookeeper.ClientCnxn: Error while calling watcher
java.lang.NullPointerException
at
org.apache.hadoop.hbase.zookeeper.ZKUtil$NodeAndData.isEmpty(ZKUtil.java:667)
at
org.apache.hadoop.hbase.security.access.ZKPermissionWatcher.refreshNodes(ZKPermissionWatcher.java:152)
at
org.apache.hadoop.hbase.security.access.ZKPermissionWatcher.nodeChildrenChanged(ZKPermissionWatcher.java:142)
at
org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:439)
at
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:543)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:518)
2015-06-05 20:32:04,553 INFO
[B.defaultRpcServer.handler=24,queue=4,port=16000]
client.ConnectionManager$HConnectionImplementation: Closing zookeeper
sessionid=0x200541f1fd400c0
2015-06-05 20:32:04,561 INFO
[B.defaultRpcServer.handler=24,queue=4,port=16000] zookeeper.ZooKeeper:
Session: 0x200541f1fd400c0 closed
2015-06-05 20:32:04,561 INFO
[B.defaultRpcServer.handler=24,queue=4,port=16000-EventThread]
zookeeper.ClientCnxn: EventThread shut down
2015-06-05 20:32:04,631 INFO [B.defaultRpcServer.handler=7,queue=2,port=16000]
client.ConnectionManager$HConnectionImplementation: Closing zookeeper
sessionid=0x200541f1fd400c2
2015-06-05 20:32:04,644 INFO [B.defaultRpcServer.handler=7,queue=2,port=16000]
zookeeper.ZooKeeper: Session: 0x200541f1fd400c2 closed
2015-06-05 20:32:04,644 INFO
[B.defaultRpcServer.handler=7,queue=2,port=16000-EventThread]
zookeeper.ClientCnxn: EventThread shut down
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