Double assigned znodes in regionserver
--------------------------------------
Key: HBASE-2504
URL: https://issues.apache.org/jira/browse/HBASE-2504
Project: Hadoop HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.20.3
Reporter: Miklos Kurucz
regionserver log:
Thu Apr 29 13:34:27 CEST 2010 Starting regionserver on dell102
...
2010-04-29 13:34:29,656 INFO org.apache.zookeeper.ClientCnxn: Opening socket
connection to server dell147/10.1.3.147:2181
2010-04-29 13:34:29,657 INFO org.apache.zookeeper.ClientCnxn: Socket connection
established to dell147/10.1.3.147:2181, initiating session
2010-04-29 13:34:29,678 INFO org.apache.zookeeper.ClientCnxn: Session
establishment complete on server dell147/10.1.3.147:2181, sessionid =
0x284958aa550001, negotiated timeout = 60000
...
2010-04-29 14:13:30,096 INFO org.apache.zookeeper.ZooKeeper: Initiating client
connection, connectString=dell149:2181,dell148:2181,dell147:2181
sessionTimeout=60000
watcher=org.apache.hadoop.hbase.client.hconnectionmanager$clientzkwatc...@46d895e1
2010-04-29 14:13:30,096 INFO org.apache.zookeeper.ClientCnxn: Opening socket
connection to server dell147/10.1.3.147:2181
2010-04-29 14:13:30,161 INFO org.apache.zookeeper.ClientCnxn: Socket connection
established to dell147/10.1.3.147:2181, initiating session
2010-04-29 14:13:30,194 INFO org.apache.zookeeper.ClientCnxn: Session
establishment complete on server dell147/10.1.3.147:2181, sessionid =
0x284958aa550014, negotiated timeout = 60000
2010-04-29 14:13:30,195 DEBUG
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode
/hbase/root-region-server got 10.1.3.123:60020
2010-04-29 14:13:30,226 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Found ROOT at
10.1.3.123:60020
2010-04-29 14:13:30,243 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Cached location
for .META.,,1 is 10.1.3.125:60020
2010-04-29 14:13:30,247 DEBUG
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Read ZNode /hbase/master
got 10.1.3.150:60000
...
2010-04-29 22:06:01,637 INFO org.apache.zookeeper.ZooKeeper: Session:
0x284958aa550014 closed
2010-04-29 22:06:02,012 DEBUG
org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Closed connection with
ZooKeeper
Clearly the reinitializeZooKeeper() method was called for some reason.
Unfortunately:
hbase(main):005:0> zk 'get /hbase/rs/1272540873161'
10.1.3.102:60020
cZxid = 0x5f0000002b
ctime = Thu Apr 29 13:34:33 CEST 2010
mZxid = 0x5f0000003e
mtime = Thu Apr 29 13:34:33 CEST 2010
pZxid = 0x5f0000002b
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x284958aa550001
dataLength = 16
numChildren = 0
The owner of the zookeeper node is the first session which was never closed.
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