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From "Zhenghua Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2348) Data between leader and followers are not synchronized.
Date Wed, 14 Jun 2017 13:04:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16049152#comment-16049152
] 

Zhenghua Chen commented on ZOOKEEPER-2348:
------------------------------------------

[~hanm] if only the old leader saw the session expired´╝îwhat the client saw? Connection lost,
or session expired?
it's ok for connection lost but inconsistent  if client saw the session expired.


> Data between leader and followers are not synchronized.
> -------------------------------------------------------
>
>                 Key: ZOOKEEPER-2348
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2348
>             Project: ZooKeeper
>          Issue Type: Bug
>    Affects Versions: 3.5.1
>            Reporter: Echo Chen
>
> When client session expired, leader tried to remove it from session map and remove its
EPHEMERAL znode, for example, /test_znode. This operation succeed on leader, but at the very
same time, network fault happended and not synced to followers, a new leader election launched.
After leader election finished, the new leader is not the old leader. we found the znode /test_znode
still existed in the followers but not on leader
>  *Scenario :* 
> 1) Create znode E.g.  
> {{/rmstore/ZKRMStateRoot/RMAppRoot/application_1449644945944_0001/appattempt_1449644945944_0001_000001}}
> 2) Delete Znode. 
> 3) Network fault b/w follower and leader machines
> 4) leader election again and follower became leader.
> Now data is not synced with new leader..After this client is not able to same znode.



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