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Date: Thu, 13 Oct 2016 14:01:20 +0000 (UTC)
From: =?utf-8?Q?Markus_D=C3=B6ring_=28JIRA=29?= <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13012001.1476367273000.817128.1476367280425@Atlassian.JIRA>
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References: <JIRA.13012001.1476367273000@Atlassian.JIRA> <JIRA.13012001.1476367273429@arcas>
Subject: [jira] [Created] (YARN-5730) Improve setting of environment
 variable HOME in containers
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archived-at: Thu, 13 Oct 2016 14:01:22 -0000

Markus D=C3=B6ring created YARN-5730:
-----------------------------------

             Summary: Improve setting of environment variable HOME in conta=
iners
                 Key: YARN-5730
                 URL: https://issues.apache.org/jira/browse/YARN-5730
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: nodemanager
         Environment: ContainerLaunch.java
            Reporter: Markus D=C3=B6ring
            Priority: Minor


Currently, the HOME environment variable for a YARN container is determined=
 as follows[1]:

# if the (undocumented) configuration {{yarn.nodemanager.user-home-dir}} is=
 set, HOME is set to its value
# otherwise, HOME is set to {{"/home/"}}

Option 1 is suboptimal in a multi-user environment, while the default does =
not help at all.

It would be nice if we could  do one of the following:

# default to HOME unset
# default to {{"/home/" + container.getUser()}}
# get HOME from container

Option 1 would at least inform the process about the problem, but would obv=
iously cause some problems in programs that assume HOME to be set. Option 2=
 might point to the correct home, at least it's not more  incorrect than {{=
"/home/"}}. Option 3 might be the best choice, but it also requires API cha=
nges.


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