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From "Patrick Hunt (JIRA)" <j...@apache.org>
Subject [jira] Commented: (ZOOKEEPER-662) Too many CLOSE_WAIT socket state on a server
Date Tue, 02 Feb 2010 17:30:21 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12828674#action_12828674
] 

Patrick Hunt commented on ZOOKEEPER-662:
----------------------------------------

What client type are you using? Java or C? both?
Are you using any 4letter words? Or tools that use 4letter words?


> Too many CLOSE_WAIT socket state on a server
> --------------------------------------------
>
>                 Key: ZOOKEEPER-662
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-662
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: quorum
>    Affects Versions: 3.2.1
>         Environment: Linux 2.6.9
>            Reporter: Qian Ye
>             Fix For: 3.3.0
>
>         Attachments: zookeeper.log.2010020105, zookeeper.log.2010020106
>
>
> I have a zookeeper cluster with 5 servers, zookeeper version 3.2.1, here is the content
in the configure file, zoo.cfg
> ======
> # The number of milliseconds of each tick
> tickTime=2000
> # The number of ticks that the initial 
> # synchronization phase can take
> initLimit=5
> # The number of ticks that can pass between 
> # sending a request and getting an acknowledgement
> syncLimit=2
> # the directory where the snapshot is stored.
> dataDir=./data/
> # the port at which the clients will connect
> clientPort=8181
> # zookeeper cluster list
> server.100=10.23.253.43:8887:8888
> server.101=10.23.150.29:8887:8888
> server.102=10.23.247.141:8887:8888
> server.200=10.65.20.68:8887:8888
> server.201=10.65.27.21:8887:8888
> =====
> Before the problem happened, the server.200 was the leader. Yesterday morning, I found
the there were many sockets with the state of CLOSE_WAIT on the clientPort (8181),  the total
was over about 120. Because of these CLOSE_WAIT, the server.200 could not accept more connections
from the clients. The only thing I can do under this situation is restart the server.200,
at about 2010-02-01 06:06:35. The related log is attached to the issue.

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