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Date: Thu, 24 Aug 2017 16:42:00 +0000 (UTC)
From: "Michael Han (JIRA)" <jira@apache.org>
To: dev@zookeeper.apache.org
Message-ID: <JIRA.13084519.1499169053000.112968.1503592920603@Atlassian.JIRA>
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Subject: [jira] [Assigned] (ZOOKEEPER-2836) QuorumCnxManager.Listener Thread
 Better handling of SocketTimeoutException
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archived-at: Thu, 24 Aug 2017 16:42:06 -0000


     [ https://issues.apache.org/jira/browse/ZOOKEEPER-2836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Han reassigned ZOOKEEPER-2836:
--------------------------------------

    Assignee: gaoshu

> 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:  3.4.6.2.3.2.0-2950 
>            Reporter: Amarjeet Singh
>            Assignee: gaoshu
>            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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