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From Ivan Kelly <iv...@yahoo-inc.com>
Subject Re: issues with ipv6 on debian squeeze
Date Mon, 16 Aug 2010 13:51:58 GMT
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:QuorumCnxManager@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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