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Posted to solr-user@lucene.apache.org by Arcadius Ahouansou <ar...@menelic.com> on 2015/09/04 05:57:22 UTC
Zookeeper Quorum leader election
We have a quorum of 3 ZK nodes zk1, zk2 and zk3.
All nodes are identicals.
After multiple restart of the ZK nodes, always keeping the majority of 2,
we have noticed that the node zk1 has never become the leader.
Only zk2 and zk3 become leader.
1) Is there any know reason or possible misconfiguration that may cause zk1
to never become a leader? (note that we do not have any zk group set-up)
2) Is there any command or way to force zk1 to become leader of the quorum?
Note that all connected SolrJ clients have zkhost set to
zk1:port,zk2:port,zk3:port
Thanks.
--
Arcadius Ahouansou
Menelic Ltd | Information is Power
M: 07908761999
W: www.menelic.com
---
Re: Zookeeper Quorum leader election
Posted by Erick Erickson <er...@gmail.com>.
Thanks for adding that to our collective knowledge store!
On Thu, Oct 22, 2015 at 2:44 AM, Arcadius Ahouansou
<ar...@menelic.com> wrote:
> The leader election issue we were having was solved by passing
>
> -Djava.net.preferIPv4Stack=true
>
> to zookeeper startup script
>
> It seems our Linux servers have IPv6 enabled but we have no IPv6 network.
>
> Hope this helps others.
>
> Arcadius.
>
>
> On 4 September 2015 at 04:57, Arcadius Ahouansou <ar...@menelic.com>
> wrote:
>
>>
>> We have a quorum of 3 ZK nodes zk1, zk2 and zk3.
>> All nodes are identicals.
>>
>> After multiple restart of the ZK nodes, always keeping the majority of 2,
>> we have noticed that the node zk1 has never become the leader.
>> Only zk2 and zk3 become leader.
>>
>> 1) Is there any know reason or possible misconfiguration that may cause
>> zk1 to never become a leader? (note that we do not have any zk group
>> set-up)
>>
>> 2) Is there any command or way to force zk1 to become leader of the quorum?
>>
>> Note that all connected SolrJ clients have zkhost set to
>> zk1:port,zk2:port,zk3:port
>>
>> Thanks.
>>
>>
>> --
>> Arcadius Ahouansou
>> Menelic Ltd | Information is Power
>> M: 07908761999
>> W: www.menelic.com
>> ---
>>
>
>
>
> --
> Arcadius Ahouansou
> Menelic Ltd | Information is Power
> M: 07908761999
> W: www.menelic.com
> ---
Re: Zookeeper Quorum leader election
Posted by Arcadius Ahouansou <ar...@menelic.com>.
The leader election issue we were having was solved by passing
-Djava.net.preferIPv4Stack=true
to zookeeper startup script
It seems our Linux servers have IPv6 enabled but we have no IPv6 network.
Hope this helps others.
Arcadius.
On 4 September 2015 at 04:57, Arcadius Ahouansou <ar...@menelic.com>
wrote:
>
> We have a quorum of 3 ZK nodes zk1, zk2 and zk3.
> All nodes are identicals.
>
> After multiple restart of the ZK nodes, always keeping the majority of 2,
> we have noticed that the node zk1 has never become the leader.
> Only zk2 and zk3 become leader.
>
> 1) Is there any know reason or possible misconfiguration that may cause
> zk1 to never become a leader? (note that we do not have any zk group
> set-up)
>
> 2) Is there any command or way to force zk1 to become leader of the quorum?
>
> Note that all connected SolrJ clients have zkhost set to
> zk1:port,zk2:port,zk3:port
>
> Thanks.
>
>
> --
> Arcadius Ahouansou
> Menelic Ltd | Information is Power
> M: 07908761999
> W: www.menelic.com
> ---
>
--
Arcadius Ahouansou
Menelic Ltd | Information is Power
M: 07908761999
W: www.menelic.com
---