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From Andor Molnar <an...@cloudera.com.INVALID>
Subject Re: Verify zookeeper cluster consistency
Date Fri, 27 Jul 2018 09:04:49 GMT
Hi Klearchos,

Some tool which is constantly querying the znode tree on each of every
participant and tolerates some latency between the inconsistencies, but
reports everything above the threshold could do the trick.

Personally I'm not aware of anything existing, but feel free to dig github
or create your own one.


On Fri, Jul 27, 2018 at 9:16 AM, Chaloulos, Klearchos (Nokia - GR/Athens) <
klearchos.chaloulos@nokia.com> wrote:

> Hello,
> I recently ran into a case where my zookeeper servers had inconsistent
> data, that is nodes that existed in one server did not exist in the other
> two. I used 3 servers, with version 3.4.9. Unfortunately I cannot reproduce
> the issue, as it occurred a long time ago in an environment outside my
> control.
> However my question is: Is there a way to detect zookeeper cluster
> inconsistencies? I am not talking about transient inconsistencies that
> exist for, say, a few seconds, but for permanent inconsistencies. In my
> case the inconsistencies persisted for a month!
> Best regards,
> Klearchos

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