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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