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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2836) QuorumCnxManager.Listener Thread Better handling of SocketTimeoutException
Date Sat, 19 Aug 2017 08:58:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16134030#comment-16134030

Hadoop QA commented on ZOOKEEPER-2836:

+1 overall.  GitHub Pull Request  Build

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

    +0 tests included.  The patch appears to be a documentation patch that doesn't require

    +1 javadoc.  The javadoc tool did not generate any 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

    +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/949//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/949//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-ZOOKEEPER-github-pr-build/949//console

This message is automatically generated.

> QuorumCnxManager.Listener Thread Better handling of SocketTimeoutException
> --------------------------------------------------------------------------
>                 Key: ZOOKEEPER-2836
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2836
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: leaderElection, quorum
>    Affects Versions: 3.4.6
>         Environment: Machine: Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.78-1 x86_64 GNU/Linux
> Java Version: jdk64/jdk1.8.0_40
> zookeeper version: 
>            Reporter: Amarjeet Singh
>            Priority: Critical
> QuorumCnxManager Listener thread blocks SocketServer on accept but we are getting SocketTimeoutException
 on our boxes after 49days 17 hours . As per current code there is a 3 times retry and after
that it says "_As I'm leaving the listener thread, I won't be able to participate in leader
election any longer: $<hostname>/$<ip>:3888__" , Once server nodes reache this
state and we restart or add a new node ,it fails to join cluster and logs 'WARN  QuorumPeer<myid=1>/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@383
- Cannot open channel to 3 at election address $<hostname>/$<ip>:3888' .
>         As there is no timeout specified for ServerSocket it should never timeout but
there are some already discussed issues where people have seen this issue and added checks
for SocketTimeoutException explicitly like https://issues.apache.org/jira/browse/KARAF-3325
>         I think we need to handle SocketTimeoutException on similar lines for zookeeper
as well 

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