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https://issues.apache.org/jira/browse/HDFS-4607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13605863#comment-13605863
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Ivan Mitic commented on HDFS-4607:
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bq. Digging into the issue, it appears to be a problem of slow response trying
to resolve an unknown host name. The test generates multiple bogus host names
of the form nn1, nn2, nn3, etc. Each call to TestGetConf#setupAddress ends up
iterating through each of 10 such addresses, ultimately calling
InetAddress#getByName. The same thing happens again later for each call to
TestGetConf#verifyAddresses. On Mac, this comes back nearly instantaneously
with host not found. On my Windows VM, each host name takes ~2.25s before
responding with host not found. Simply running "ping nn1" on the command prompt
confirms this behavior. Do you know if we're experiencing a Windows network
misconfiguration?
Thanks Chris. I also looked deeper into the issue. I don't think we can do
anything here, and actually, I am not sure if this as a problem. It should be
OK for unknown host resolution to take a few seconds (please correct me if
needed, I am no expert here :)). I have an idea of how to fix this such that
the test runs faster on Windows, but will do this via a separate patch to avoid
randomizing this fix.
> TestGetConf#testGetSpecificKey fails on Windows
> -----------------------------------------------
>
> Key: HDFS-4607
> URL: https://issues.apache.org/jira/browse/HDFS-4607
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Ivan Mitic
> Assignee: Ivan Mitic
> Attachments: HDFS-4607.2.patch, HDFS-4607.patch
>
>
> Test fails on the below stack:
> {code}
> testGetSpecificKey(org.apache.hadoop.hdfs.tools.TestGetConf) Time elapsed:
> 37 sec <<< FAILURE!
> java.lang.AssertionError:
> at org.junit.Assert.fail(Assert.java:91)
> at org.junit.Assert.assertTrue(Assert.java:43)
> at org.junit.Assert.assertTrue(Assert.java:54)
> at
> org.apache.hadoop.hdfs.tools.TestGetConf.testGetSpecificKey(TestGetConf.java:341)
> {code}
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