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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13234) Get random port by new ServerSocket(0).getLocalPort() in ServerSocketUtil#getPort
Date Mon, 03 Oct 2016 17:59:21 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15542988#comment-15542988
] 

Xiaoyu Yao commented on HADOOP-13234:
-------------------------------------

I've seen a recent instance of Jenkins failure [here|https://builds.apache.org/job/PreCommit-HDFS-Build/16970/testReport/org.apache.hadoop.hdfs/TestDFSShell/testMoveWithTargetPortEmpty/]
as shown below, [~brahmareddy], can you confirm if the proposal here will fix the issue?

{code}
Tests run: 48, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 63.928 sec <<< FAILURE!
- in org.apache.hadoop.hdfs.TestDFSShell
testMoveWithTargetPortEmpty(org.apache.hadoop.hdfs.TestDFSShell)  Time elapsed: 9.026 sec
 <<< ERROR!
java.io.IOException: Port is already in use; giving up after 10 times.
	at org.apache.hadoop.net.ServerSocketUtil.waitForPort(ServerSocketUtil.java:98)
	at org.apache.hadoop.hdfs.TestDFSShell.testMoveWithTargetPortEmpty(TestDFSShell.java:809)

{code}

> Get random port by new ServerSocket(0).getLocalPort() in ServerSocketUtil#getPort
> ---------------------------------------------------------------------------------
>
>                 Key: HADOOP-13234
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13234
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>
> As per [~iwasakims] comment from [here|https://issues.apache.org/jira/browse/HDFS-10367?focusedCommentId=15275604&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15275604]
> we can get available random port by {{new ServerSocket(0).getLocalPort()}} and it's more
portable. 



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