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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5486) Potential file handler leak in JobHistoryServer web ui.
Date Thu, 29 Aug 2013 06:03:51 GMT
Rohith Sharma K S created MAPREDUCE-5486:
--------------------------------------------

             Summary: 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


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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