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From "Yasuhito Fukuda (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ZOOKEEPER-2193) reconfig command completes even if parameter is wrong obviously
Date Wed, 20 May 2015 09:39:00 GMT
Yasuhito Fukuda created ZOOKEEPER-2193:
------------------------------------------

             Summary: reconfig command completes even if parameter is wrong obviously
                 Key: ZOOKEEPER-2193
                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2193
             Project: ZooKeeper
          Issue Type: Bug
          Components: leaderElection, server
    Affects Versions: 3.5.0
         Environment: CentOS7 + Java7
            Reporter: Yasuhito Fukuda


Even if reconfig parameter is wrong, it was confirmed to complete.
refer to the following.

- Ensemble consists of four nodes

{noformat}
[zk: vm-101:2181(CONNECTED) 0] config
server.1=192.168.100.101:2888:3888:participant
server.2=192.168.100.102:2888:3888:participant
server.3=192.168.100.103:2888:3888:participant
server.4=192.168.100.104:2888:3888:participant
version=100000000
{noformat}

- add node by reconfig
{noformat}
[zk: vm-101:2181(CONNECTED) 9] reconfig -add server.5=192.168.100.104:2888:3888:participant;0.0.0.0:2181
Committed new configuration:
server.1=192.168.100.101:2888:3888:participant
server.2=192.168.100.102:2888:3888:participant
server.3=192.168.100.103:2888:3888:participant
server.4=192.168.100.104:2888:3888:participant
server.5=192.168.100.104:2888:3888:participant;0.0.0.0:2181
version=300000007
{noformat}

server.4 and server.5 of the IP address is a duplicate.

In this state, reader election will not work properly.
Besides, it is assumed an ensemble will be undesirable state.
I think that need a parameter validation when reconfig.



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