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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7677) Docker image cannot set HADOOP_CONF_DIR
Date Thu, 01 Feb 2018 16:22:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16348841#comment-16348841
] 

Jason Lowe commented on YARN-7677:
----------------------------------

Ultimately one way to debug this would be to compare the container launch scripts between
the two scenarios (i.e.: with and without YARN-7677 applied).  The only difference should
be that some variables in the launch script will have the export var=$\{_var_:-_value_\} syntax
that didn't before.  In the non-Docker case, all of those variables should be getting the
NM settings unless somehow those variables already are set to _different_ values in the environment
before the launch script runs.


> Docker image cannot set HADOOP_CONF_DIR
> ---------------------------------------
>
>                 Key: YARN-7677
>                 URL: https://issues.apache.org/jira/browse/YARN-7677
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Eric Badger
>            Assignee: Jim Brennan
>            Priority: Major
>             Fix For: 3.1.0, 3.0.1
>
>         Attachments: YARN-7677.001.patch, YARN-7677.002.patch
>
>
> Currently, {{HADOOP_CONF_DIR}} is being put into the task environment whether it's set
by the user or not. It completely bypasses the whitelist and so there is no way for a task
to not have {{HADOOP_CONF_DIR}} set. This causes problems in the Docker use case where Docker
containers will set up their own environment and have their own {{HADOOP_CONF_DIR}} preset
in the image itself. 



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