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From Steven1314 <Wei....@Arcserve.com>
Subject Dynamic configuration file can not be updated automatically after some zookeeper servers of zk cluster are down
Date Fri, 27 Sep 2019 03:02:39 GMT
   Recently 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? Could you please help me?
  Really look forward to hearing from you!
Thanks




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