Hi Ivan,

Wow - thanks for the link.   I'll try changing the mentioned variable rather
than disabling tcpv6.

regards,
Martin

On 16 August 2010 14:51, Ivan Kelly <iv...@yahoo-inc.com> wrote:

> This is a know issue with debian + java.
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560044
> Spent a few hours stuck on this myself last week.
>
> -Ivan
>
>
>
>
> On 16 Aug 2010, at 13:28, Martin Waite wrote:
>
>  Hi,
>>
>> I have spent a few hours getting zookeeper election to work on debian
>> squeeze.
>>
>> The zookeeper log contained the following error when trying to run an
>> election:
>>
>> 2010-08-16 11:14:51,316 - WARN  [WorkerSender Thread:quorumcnxmana...@361]
>> -
>> Cannot open channel to 2 at election address vm-024-squeeze-mw/
>> 172.30.30.67:3888
>> java.net.SocketException: Network is unreachable
>>       at sun.nio.ch.Net.connect(Native Method)
>>       at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:525)
>>       at java.nio.channels.SocketChannel.open(SocketChannel.java:164)
>>       at
>>
>> org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:347)
>>       at
>>
>> org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:320)
>>       at
>>
>> org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:353)
>>       at
>>
>> org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:326)
>>       at java.lang.Thread.run(Thread.java:636)
>>
>> Looking at netstat output, each server was running the listener on the
>> tcpv6
>> interface only, and I don't think that my network can handle this.
>>
>> The solution was to disable ipv6 on my servers.  In /etc/default/grub add
>> the line:
>>
>> GRUB_CMDLINE_LINUX="ipv6.disable=1"
>>
>> and then run "update-grub" and reboot.
>>
>> This fixed the problem.
>>
>> I am surprised that zookeeper (3.3.1) did not bind to all interfaces.
>>
>> Will the new clientPortBindHostAddress config support a specification that
>> can distinguish between tcpv4 and tcpv6 if both are available ?
>>
>> Also, will an equivalent electionPortBindHostAddress be provided ?
>>
>> regards,
>> Martin
>>
>
>

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