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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5486) Potential file handler leak in JobHistoryServer web ui.
Date Wed, 04 Sep 2013 16:26:54 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757923#comment-13757923
] 

Jason Lowe commented on MAPREDUCE-5486:
---------------------------------------

Moving this to the YARN project since it is a change against YARN and not MAPREDUCE.
                
> Potential file handler leak in JobHistoryServer web ui.
> -------------------------------------------------------
>
>                 Key: MAPREDUCE-5486
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5486
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobhistoryserver
>    Affects Versions: 2.0.5-alpha, 2.1.1-beta
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>         Attachments: MAPREDUCE-5486.patch
>
>
> Any problem in getting aggregated logs for rendering on web ui, then LogReader is not
closed. 
> Now, it reader is not closed which causing many connections in close_wait state.
> hadoopuser@hadoopuser:> jps
> *27909* JobHistoryServer
> DataNode port is 50010. When greped with DataNode port, many connections are in CLOSE_WAIT
from JHS.
> hadoopuser@hadoopuser:> netstat -tanlp |grep 50010
> tcp        0      0 10.18.40.48:50010       0.0.0.0:*               LISTEN      21453/java
         
> tcp        1      0 10.18.40.48:20596       10.18.40.48:50010       CLOSE_WAIT  *27909*/java
         
> tcp        1      0 10.18.40.48:19667       10.18.40.152:50010      CLOSE_WAIT  *27909*/java
         
> tcp        1      0 10.18.40.48:20593       10.18.40.48:50010       CLOSE_WAIT  *27909*/java
         
> tcp        1      0 10.18.40.48:12290       10.18.40.48:50010       CLOSE_WAIT  *27909*/java
         
> tcp        1      0 10.18.40.48:19662       10.18.40.152:50010      CLOSE_WAIT  *27909*/java
         

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