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From harish lohar <hklo...@gmail.com>
Subject Re: Port 3888 closed on Leader
Date Thu, 23 Aug 2018 12:52:49 GMT
Thanks Everyone.

Yes, even i was wondering how can a node can be leader without port 3888
being open, we just did a restart and everything became fine.

Port 3888 must be in LISTEN mode at all Zk Nodes , while 2888 only opens at
leader and other nodes connect to it.


Thanks
Harish



On Thu, Aug 23, 2018 at 6:47 AM Shawn Heisey <apache@elyograg.org> wrote:

> On 8/15/2018 7:46 AM, harish lohar wrote:
> > In a deployment of 3 Node Zk Cluster we have seen that sometime port 3888
> > is absent after the cluster is formed , this causes Follower node to not
> > able to connect to leader if they restart.
> >
> > Don't leader itself should come out of clustering if this happens  ??
>
> I'm not well-versed in how ZK works internally, and don't have access
> any more to systems I can check, but I seem to remember when looking at
> a live ensemble that not every ZK instance will bind to all three ports
> (2181, 2888, and 3888 if using the example configs).  Surprised me when
> I noticed it, but I didn't worry about it too much since ZK seemed to be
> working correctly.
>
> Thanks,
> Shawn
>
>

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