Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase, mail # user - zookeeper connection problem in pseudo mode


Copy link to this message
-
Re: zookeeper connection problem in pseudo mode
yonghu 2012-01-05, 16:16
I set up a pseudo mode, it also needs to close the firewall?

Yong

On Thu, Jan 5, 2012 at 4:59 PM, Tom Wilcox <[EMAIL PROTECTED]> wrote:
> 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