Rakesh R commented on ZOOKEEPER-2355:

[~arshad.mohammad], Can you check 2nd point in the [review 
 I think logging {{last processed zxid}} would help in debugging, right?

> Ephemeral node is never deleted if follower fails while reading the proposal 
> packet
> -----------------------------------------------------------------------------------
>                 Key: ZOOKEEPER-2355
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2355
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: quorum, server
>            Reporter: Arshad Mohammad
>            Assignee: Arshad Mohammad
>            Priority: Critical
>             Fix For: 3.4.10, 3.5.3
>         Attachments: ZOOKEEPER-2355-01.patch, ZOOKEEPER-2355-02.patch, 
> ZOOKEEPER-2355-03.patch, ZOOKEEPER-2355-04.patch
> ZooKeeper ephemeral node is never deleted if follower fail while reading the 
> proposal packet
> The scenario is as follows:
> # Configure three node ZooKeeper cluster, lets say nodes are A, B and C, 
> start all, assume A is leader, B and C are follower
> # Connect to any of the server and create ephemeral node /e1
> # Close the session, ephemeral node /e1 will go for deletion
> # While receiving delete proposal make Follower B to fail with 
> {{SocketTimeoutException}}. This we need to do to reproduce the scenario 
> otherwise in production environment it happens because of network fault.
> # Remove the fault, just check that faulted Follower is now connected with 
> quorum
> # Connect to any of the server, create the same ephemeral node /e1, created 
> is success.
> # Close the session,  ephemeral node /e1 will go for deletion
> # {color:red}/e1 is not deleted from the faulted Follower B, It should have 
> been deleted as it was again created with another session{color}
> # {color:green}/e1 is deleted from Leader A and other Follower C{color}

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