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Posted to issues@zookeeper.apache.org by "Steven Chan (Jira)" <ji...@apache.org> on 2019/09/25 07:08:00 UTC
[jira] [Updated] (ZOOKEEPER-3556) Dynamic configuration file can
not be updated automatically after some zookeeper servers of zk cluster are
down
[ https://issues.apache.org/jira/browse/ZOOKEEPER-3556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steven Chan updated ZOOKEEPER-3556:
-----------------------------------
Summary: Dynamic configuration file can not be updated automatically after some zookeeper servers of zk cluster are down (was: Dynamic configuration file can not be updated automatically)
> Dynamic configuration file can not be updated automatically after some zookeeper servers of zk cluster are down
> ---------------------------------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-3556
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3556
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.5.5
> Reporter: Steven Chan
> Priority: Blocker
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> *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?*
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