Markus Döring created YARN-5730:
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Summary: Improve setting of environment variable HOME in containers
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 Döring
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
obviously 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
changes.
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