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https://issues.apache.org/jira/browse/HDFS-2568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13153804#comment-13153804
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Hudson commented on HDFS-2568:
------------------------------

Integrated in Hadoop-Mapreduce-trunk #903 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/903/])
    HDFS-2568. Use a set to manage child sockets in XceiverServer. Contributed 
by Harsh J

eli : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1204122
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java
* 
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiverServer.java

                
> Use a set to manage child sockets in XceiverServer
> --------------------------------------------------
>
>                 Key: HDFS-2568
>                 URL: https://issues.apache.org/jira/browse/HDFS-2568
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node
>    Affects Versions: 0.24.0
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Trivial
>             Fix For: 0.23.1
>
>         Attachments: HDFS-2568.patch, HDFS-2568.patch
>
>
> Found while reading up for HDFS-2454, currently we maintain childSockets in a 
> DataXceiverServer as a Map<Socket,Socket>. This can very well be a 
> Set<Socket> data structure -- since the goal is easy removals.

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