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From Patrick Hunt <ph...@apache.org>
Subject Re: Verify zookeeper cluster consistency
Date Wed, 01 Aug 2018 19:06:55 GMT
iirc Ben (or was it someone else from Facebook) mentioned at a meetup about
doing some work in this area. I believe they were hashing the tree but I
may be mis-remembering.... Perhaps one of those folks can shed light.

Patrick

On Fri, Jul 27, 2018 at 2:04 AM Andor Molnar <andor@cloudera.com.invalid>
wrote:

> 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.
>
> Regards,
> Andor
>
>
>
>
> 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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