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
I have already disabled ipv6 and close the firewall, but I still get
the same problem. :(

Yong

On Thu, Jan 5, 2012 at 5:16 PM, yonghu <[EMAIL PROTECTED]> wrote:
> 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