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https://issues.apache.org/jira/browse/HDFS-1929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13033362#comment-13033362
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Todd Lipcon commented on HDFS-1929:
-----------------------------------

Sorry to be a nit picker, but we should specify numDataNodes(0) so the test 
runs a little faster.

> TestEditLogFileOutputStream fails if running on same host as NN
> ---------------------------------------------------------------
>
>                 Key: HDFS-1929
>                 URL: https://issues.apache.org/jira/browse/HDFS-1929
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Aaron T. Myers
>         Attachments: hdfs-1929.0.patch
>
>
> This test instantiates NameNode directly rather than using MiniDFSCluster, so 
> it tries to claim the default port 50070 rather than using an ephemeral one. 
> This makes the test fail if you are running a NN on the same machine where 
> you're running the test.

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