GitHub user zsxwing opened a pull request:

    https://github.com/apache/spark/pull/500

    SPARK-1583: Fix a bug that using java.util.HashMap by mistake

    JIRA: https://issues.apache.org/jira/browse/SPARK-1583
    
    Does anyone know why using `java.util.HashMap` rather than 
`mutable.HashMap`? Some methods of `java.util.HashMap` are not generics and 
compiler can not help us find similar problems.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/zsxwing/spark SPARK-1583

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/500.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #500
    
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commit 7bfd74d2ed45e50dd83132d6ab7c336f8eb57cea
Author: zsxwing <[email protected]>
Date:   2014-04-23T06:29:43Z

    SPARK-1583: Fix a bug that using java.util.HashMap by mistake

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