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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1836) Thousand of CLOSE_WAIT socket
Date Fri, 06 May 2011 07:04:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13029794#comment-13029794
] 

Hadoop QA commented on HDFS-1836:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12478378/patch-draft-1836.patch
  against trunk revision 1100054.

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

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/hudson/job/PreCommit-HDFS-Build/463//console

This message is automatically generated.

> Thousand of CLOSE_WAIT socket 
> ------------------------------
>
>                 Key: HDFS-1836
>                 URL: https://issues.apache.org/jira/browse/HDFS-1836
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.20.2
>         Environment: Linux 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:52:25 EST 2011 x86_64
x86_64 x86_64 GNU/Linux
> java version "1.6.0_23"
> Java(TM) SE Runtime Environment (build 1.6.0_23-b05)
> Java HotSpot(TM) 64-Bit Server VM (build 19.0-b09, mixed mode)
>            Reporter: Dennis Cheung
>         Attachments: patch-draft-1836.patch
>
>
> $ /usr/sbin/lsof -i TCP:50010 | grep -c CLOSE_WAIT
> 4471
> It is better if everything runs normal. 
> However, from time to time there are some "DataStreamer Exception: java.net.SocketTimeoutException"
and "DFSClient.processDatanodeError(2507) | Error Recovery for" can be found from log file
and the number of CLOSE_WAIT socket just keep increasing
> The CLOSE_WAIT handles may remain for hours and days; then "Too many open file" some
day.

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