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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2355) Ephemeral node is never deleted if follower fails while reading the proposal packet
Date Thu, 06 Jul 2017 02:42:03 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075825#comment-16075825
] 

Hadoop QA commented on ZOOKEEPER-2355:
--------------------------------------

-1 overall.  GitHub Pull Request  Build
      

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 5 new or modified tests.

    -1 javadoc.  The javadoc tool appears to have generated 1 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 3.0.1) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/861//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/861//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/861//console

This message is automatically generated.

> 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
>    Affects Versions: 3.4.8, 3.4.9, 3.4.10, 3.5.1, 3.5.2, 3.5.3
>            Reporter: Mohammad Arshad
>            Assignee: Mohammad Arshad
>            Priority: Critical
>         Attachments: ZOOKEEPER-2355-01.patch, ZOOKEEPER-2355-02.patch, ZOOKEEPER-2355-03.patch,
ZOOKEEPER-2355-04.patch, ZOOKEEPER-2355-05.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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