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https://issues.apache.org/jira/browse/HADOOP-9099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13505082#comment-13505082
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Tsz Wo (Nicholas), SZE commented on HADOOP-9099:
------------------------------------------------
I understand the problem after looked at Ivan's patch - "UnknownHost" was
resolved to an IP in your setting.
> NetUtils.normalizeHostName fails on domains where UnknownHost resolves to an
> IP address
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-9099
> URL: https://issues.apache.org/jira/browse/HADOOP-9099
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 1-win
> Reporter: Ivan Mitic
> Assignee: Ivan Mitic
> Attachments: HADOOP-9099.branch-1-win.patch
>
>
> I just hit this failure. We should use some more unique string for
> "UnknownHost":
> Testcase: testNormalizeHostName took 0.007 sec
> FAILED
> expected:<[65.53.5.181]> but was:<[UnknownHost]>
> junit.framework.AssertionFailedError: expected:<[65.53.5.181]> but
> was:<[UnknownHost]>
> at
> org.apache.hadoop.net.TestNetUtils.testNormalizeHostName(TestNetUtils.java:347)
> Will post a patch in a bit.
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