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https://issues.apache.org/jira/browse/HADOOP-12687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15086840#comment-15086840
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Hudson commented on HADOOP-12687:
---------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #9063 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/9063/])
HADOOP-12687. SecureUtil#QualifiedHostResolver#getByName should also try
(rohithsharmaks: rev 2b252844e04eebd4f32815d4bd6f914c02994709)
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/SecurityUtil.java
* hadoop-common-project/hadoop-common/CHANGES.txt
> SecureUtil#getByName should also try to resolve direct hostname, incase
> multiple loopback addresses are present in /etc/hosts
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-12687
> URL: https://issues.apache.org/jira/browse/HADOOP-12687
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Junping Du
> Assignee: Sunil G
> Labels: security
> Fix For: 2.9.0
>
> Attachments: 0001-YARN-4352.patch, 0002-YARN-4352.patch,
> 0003-HADOOP-12687.patch, 0004-HADOOP-12687.patch
>
>
> From
> https://builds.apache.org/job/PreCommit-YARN-Build/9661/artifact/patchprocess/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-client-jdk1.7.0_79.txt,
> we can see the tests in TestYarnClient, TestAMRMClient and TestNMClient get
> timeout which can be reproduced locally.
> When {{/etc/hosts}} has multiple loopback entries,
> {{InetAddress.getByName(null)}} will be returning the first entry present in
> etc/hosts. Hence its possible that machine hostname can be second in list and
> cause {{UnKnownHostException}}.
> Suggesting a direct resolve for such hostname scenarios.
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