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From "Qian Ye (JIRA)" <j...@apache.org>
Subject [jira] Created: (ZOOKEEPER-662) Too many CLOSE_WAIT socket state on a server
Date Tue, 02 Feb 2010 02:58:20 GMT
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

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
# The number of ticks that the initial 
# synchronization phase can take
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
# the directory where the snapshot is stored.
# the port at which the clients will connect

# zookeeper cluster list

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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