[jira] [Updated] (HADOOP-12687) SecureUtil#getByName should also try to resolve direct hostname, incase multiple loopback addresses are present in /etc/hosts

["Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-12687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod Kumar Vavilapalli updated HADOOP-12687:
---------------------------------------------
    Target Version/s: 2.8.0, 3.0.0-alpha1
            Priority: Blocker  (was: Major)

I am going to bump this to be a blocker for all outstanding releases.

This is causing too much pain, many JIRAs are running into this, and we are going ahead and committing patches relatively blindly.

Either this gets fixed or INFRA-11150 moves forward.

> 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
>            Priority: Blocker
>              Labels: security
>         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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