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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2836) QuorumCnxManager.Listener Thread Better handling of SocketTimeoutException
Date Mon, 14 Aug 2017 07:20:00 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16125320#comment-16125320

ASF GitHub Bot commented on ZOOKEEPER-2836:

GitHub user bitgaoshu opened a pull request:


    ZOOKEEPER-2836 fix SocketTimeoutException


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/bitgaoshu/zookeeper ZOOKEEPER-2836

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #336
commit 3653e6ddc21589355fb06c98aa60665fce4a4e24
Author: bitgaoshu <bitgaoshu@gmail.com>
Date:   2017-08-14T07:02:16Z

    ZOOKEEPER-2836 fix SocketTimeoutException


> 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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