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From Enrico Olivelli <eolive...@gmail.com>
Subject Re: issue from ZooKeeper 3.5.0
Date Wed, 25 Sep 2019 12:38:56 GMT
Hi Wei Gao,
The configuration file is expected to change only with an explicit
operation/client request.

You can have a fully working cluster of 5 servers with only 3 servers up
and running, you must not change the configuration files.

Can you tell more about your use case?

Enrico

Il mer 25 set 2019, 14:04 Gao,Wei <Wei.Gao@arcserve.com> ha scritto:

> Hi all,
>   I encountered a problem which blocks my development of load balance
> using ZooKeeper 3.5.5.
>    Actually, I have a ZooKeeper cluster which comprises of five zk
> servers. And the dynamic configuration file is as follows:
>
>   server.1=zk1:2888:3888:participant;0.0.0.0:2181
>   server.2=zk2:2888:3888:participant;0.0.0.0:2181
>   server.3=zk3:2888:3888:participant;0.0.0.0:2181
>   server.4=zk4:2888:3888:participant;0.0.0.0:2181
>   server.5=zk5:2888:3888:participant;0.0.0.0:2181
>
>   The zk cluster can work fine if every member works normally. However, if
> say two of them are suddenly down without previously being notified,
> the dynamic configuration file shown above will not be synchronized
> dynamically, which leads to the zk cluster fail to work normally.
>   As far as I am concerned, the dynamic configuration file should be
> modified to this if server 1 and server 5 are down suddenly as follows:
>   server.2=zk2:2888:3888:participant;0.0.0.0:2181
>   server.3=zk3:2888:3888:participant;0.0.0.0:2181
>   server.4=zk4:2888:3888:participant;0.0.0.0:2181
> But in this case, the dynamic configuration file will never change
> automatically unless you manually revise it.
>   I think this is a very common case which may happen at any time. If so,
> how can we handle with it?
>   Really look forward to hearing from you!
> Thanks
>
>

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