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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3892) Few static methods of MiniDFSCluster class incorrectly assume that it is a singleton
Date Fri, 07 Sep 2012 13:17:09 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13450606#comment-13450606
] 

Steve Loughran commented on HDFS-3892:
--------------------------------------

This is a regression w.r.t Hadoop 1.0 which does let you create >1 MiniDFSCluster in the
same JVM
                
> Few static methods of MiniDFSCluster class incorrectly assume that it is a singleton
> ------------------------------------------------------------------------------------
>
>                 Key: HDFS-3892
>                 URL: https://issues.apache.org/jira/browse/HDFS-3892
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 2.0.0-alpha
>            Reporter: Vlad Rozov
>            Priority: Minor
>
> MiniDFSCluster class declares few methods including getBlockFile() and getStorageDirPath()
as static while MiniDFSCluster is not a singleton and allows multiple instances. There are
several unit tests that create and start more than one MiniDFSCluster at the same time.

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