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From Benjamin Jaton <benjamin.ja...@gmail.com>
Subject Re: Uninvited ZK joins the cluster
Date Thu, 10 Sep 2015 18:40:45 GMT
I am actually working on a simpler scenario right now:

Install A,B
Reinstall A, B joins automatically.

Btw, I think the work on https://issues.apache.org/jira/browse/ZOOKEEPER-832
is exactly what Alexander is talking about.

On Wed, Sep 9, 2015 at 6:38 PM, Prabhjot Bharaj <prabhbharaj@gmail.com>
wrote:

> Zoo.cfg on D is pointing to which myid?
> Is that myid same for C as well?
> How does zoo.cfg look like on all nodes?
>
> Regards,
> Prabhjot
> On Sep 10, 2015 3:43 AM, "Benjamin Jaton" <benjamin.jaton@gmail.com>
> wrote:
>
> > OK maybe I'll dig into it.
> >
> > Is there anything the user could do without changing the code?
> >
> > On Wed, Sep 9, 2015 at 12:26 PM, Alexander Shraer <shralex@gmail.com>
> > wrote:
> >
> > > Hi,
> > >
> > > There were some thoughts to send and check the database id (if I'm not
> > > mistaken its called dbid) when servers connect to each other, which
> > should
> > > be different for different zookeepers. It shouldn't be difficult to
> add,
> > if
> > > you'd like to work on it.
> > >
> > > Alex
> > >
> > > On Wed, Sep 9, 2015 at 11:04 AM, Benjamin Jaton <
> > benjamin.jaton@gmail.com>
> > > wrote:
> > >
> > > > Hi,
> > > >
> > > > First I build a 3 nodes cluster (A,B,C) with zk.reconfig commands.
> > > >
> > > > Now we stop the all the ZK, and we make a new cluster (A,B,D)
> > configured
> > > > with the same ports.
> > > >
> > > > In that scenario, if you start C, it will join the ensemble, becoming
> > > > (A,B,C,D).
> > > > The problem is that it's not the same ensemble, C shouldn't have been
> > > > allowed to join the new ensemble.
> > > >
> > > > Is there a way to prevent this from happening? (even if it's hacky)
> > > >
> > > > Thanks,
> > > > Ben
> > > >
> > >
> >
>

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