I've seen that error before. Have you tried turning off your firewalls on each
node?
I do it like this:
cat $HADOOP_INSTALL/conf/slaves | xargs -I{} ssh root@{} '/etc/init.d/iptables
stop'
ssh root@jobtracker '/etc/init.d/iptables stop'
ssh root@namenode '/etc/init.d/iptables stop'
Worth a crack if you haven't tried it yet.
________________________________________
From: Leonardo Gamas [[email protected]]
Sent: 05 January 2012 15:45
To: [email protected]
Subject: Re: zookeeper connection problem in pseudo mode
I had a similar problem some time ago. The problem seems to be in the ipv6
configuration. I solved it disabling ipv6 on my host editing /etc/hosts.
2012/1/5 yonghu <[email protected]>
> Hallo,
>
> I tried the pseudo distribution mode of HBase. The Hadoop version is
> 0.20.2. I configured the hbase-site.xml as
>
> <configuration>
> <property>
> <name>hbase.rootdir</name>
> <value>hdfs://localhost:9000/hbase</value>
> </property>
> <property>
> <name>dfs.replication</name>
> <value>1</value>
> </property>
> </configuration>
>
> as same as in core-site.xml and hdfs-site.xml files of Hadoop, separately.
>
> I can successfully start HBase. But when I tried to create a table, I
> got following error information:
> ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is
> able to connect to ZooKeeper but the connection closes immediately.
> This could be a sign that the server has too many connections (30 is
> the default). Consider inspecting your ZK server logs for that error
> and then make sure you are reusing HBaseConfiguration as often as you
> can. See HTable's javadoc for more information.
>
> And I checked my ZK log and found:
>
> 2012-01-05 15:59:02,909 INFO org.apache.zookeeper.ClientCnxn: Opening
> socket connection to server localhost/0:0:0:0:0:0:0:1:2181
> 2012-01-05 15:59:02,909 WARN org.apache.zookeeper.ClientCnxn: Session
> 0x134ae4d4a6d0001 for server null, unexpected error, closing socket
> connection and attempting reconnect
> java.net.ConnectException: Connection refused
> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> at
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
> at
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
>
> This error information appeared repeatly. Can anyone tell how to solve
> this problem?
>
> Thanks!
>
> Yong
>
--
*Leonardo Gamas*
Software Engineer
+557134943514
+557581347440
[email protected]
www.jusbrasil.com.br
