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https://issues.apache.org/jira/browse/HDFS-3748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13426515#comment-13426515
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Uma Maheswara Rao G commented on HDFS-3748:
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Looks like this issue is same as HDFS-2960.
It might be due to wildcard DNS on your network.
> TestDFSUtil#testHANameNodesWithFederation failed because of misuse toString
> to generate hostname:port
> -----------------------------------------------------------------------------------------------------
>
> Key: HDFS-3748
> URL: https://issues.apache.org/jira/browse/HDFS-3748
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: federation, ha, test
> Affects Versions: 2.0.0-alpha
> Reporter: Yanbo Liang
> Priority: Minor
> Labels: test
> Attachments: HADOOP-3748.patch
>
>
> In the test case TestDFSUtil#testHANameNodesWithFederation, it misused
> InetSocketAddress.toString() to generate hostname:port format data. It cause
> the following assert failure when run this test case.
> assertEquals(NS1_NN1_HOST, map.get("ns1").get("ns1-nn1").toString());
> assertEquals(NS1_NN2_HOST, map.get("ns1").get("ns1-nn2").toString());
> assertEquals(NS2_NN1_HOST, map.get("ns2").get("ns2-nn1").toString());
> assertEquals(NS2_NN2_HOST, map.get("ns2").get("ns2-nn2").toString());
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