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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7632) MiniDFSCluster configures DataNode data directories incorrectly if using more than 1 DataNode and more than 2 storage locations per DataNode.
Date Fri, 16 Jan 2015 17:44:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14280552#comment-14280552
] 

Arpit Agarwal commented on HDFS-7632:
-------------------------------------

+1 for the patch. Thanks for fixing this Chris.

> MiniDFSCluster configures DataNode data directories incorrectly if using more than 1
DataNode and more than 2 storage locations per DataNode.
> ---------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-7632
>                 URL: https://issues.apache.org/jira/browse/HDFS-7632
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: HDFS-7632.001.patch
>
>
> {{MiniDFSCluster}} allows the caller to set the number of storage locations per DataNode.
 If this number is set higher than 2, and if the cluster is configured with more than 1 DataNode,
then the calculation of the storage directory paths will be incorrect.  Multiple DataNodes
will attempt to use the same storage directory, and one of them will fail while trying to
acquire the file lock.



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