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https://issues.apache.org/jira/browse/HDFS-4491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757223#comment-13757223
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Chris Nauroth commented on HDFS-4491:
-------------------------------------

Thanks for the new patch, Andrey.  It looks like surefire.forkNumber is going 
to work nicely.  I had another mostly successful test run on Windows with this 
patch, except I still saw {{TestDecommission}} fail, this time trying to bind 
to port 50020.

I reproduced this in isolation on Mac by running "nc -l 50020" in one shell, 
"nc localhost 50020" in a second shell, and "mvn -Pparallel-tests test 
-Dtest=TestDecommission" in a third shell.  Somehow this test is not using 
ephemeral ports for the data nodes.

                
> Parallel testing HDFS
> ---------------------
>
>                 Key: HDFS-4491
>                 URL: https://issues.apache.org/jira/browse/HDFS-4491
>             Project: Hadoop HDFS
>          Issue Type: Test
>          Components: test
>    Affects Versions: 3.0.0
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Andrey Klochkov
>         Attachments: HDFS-4491--n10.patch, HDFS-4491--n10.patch, 
> HDFS-4491--n11.patch, HDFS-4491--n11.patch, HDFS-4491--n2.patch, 
> HDFS-4491--n3.patch, HDFS-4491--n4.patch, HDFS-4491--n5.patch, 
> HDFS-4491--n6.patch, HDFS-4491--n7.patch, HDFS-4491--n8.patch, 
> HDFS-4491--n9.patch, HDFS-4491.patch
>
>
> Parallel execution of HDFS tests in multiple forks. See HADOOP-9287 for 
> details.

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