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Posted to users@kafka.apache.org by "Yu, Libo " <li...@citi.com> on 2013/11/15 22:23:04 UTC

NodeExists Keeper exception

Hi team,

Still this is from beta1. I notice this exception occurred frequently in our
broker logs.
[2013-11-14 21:09:58,714] INFO Got user-level KeeperException when proce
ssing sessionid:0x24250e816b000df type:create cxid:0x26b zxid:0xffffffff
fffffffe txntype:unknown reqpath:n/a Error Path:/consumers/myuser/owners/mytopic/2 Error:Kee
perErrorCode = NodeExists for /consumers/myuser/owners/mytopic/2 (org.apache.zookeeper.serve
r.PrepRequestProcessor)

/consumers/myuser/owners/mytopic/2 is not an ephemeral node. Is it a zookeeper bug?


Regards,

Libo

Re: NodeExists Keeper exception

Posted by Guozhang Wang <wa...@gmail.com>.

Hello Libo,

This error typically indicates failures in consumer rebalances due to
multiple consumers try to claim the same partition and gets conflicts.

Could you give some more context where you see this exception?

Guozhang

On Fri, Nov 15, 2013 at 1:23 PM, Yu, Libo <li...@citi.com> wrote:

> Hi team,
>
> Still this is from beta1. I notice this exception occurred frequently in
> our
> broker logs.
> [2013-11-14 21:09:58,714] INFO Got user-level KeeperException when proce
> ssing sessionid:0x24250e816b000df type:create cxid:0x26b zxid:0xffffffff
> fffffffe txntype:unknown reqpath:n/a Error
> Path:/consumers/myuser/owners/mytopic/2 Error:Kee
> perErrorCode = NodeExists for /consumers/myuser/owners/mytopic/2
> (org.apache.zookeeper.serve
> r.PrepRequestProcessor)
>
> /consumers/myuser/owners/mytopic/2 is not an ephemeral node. Is it a
> zookeeper bug?
>
>
> Regards,
>
> Libo
>
>

-- 
-- Guozhang