Miklos Szegedi created YARN-5736:

             Summary: YARN container executor config does not handle white space
                 Key: YARN-5736
                 URL: https://issues.apache.org/jira/browse/YARN-5736
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Miklos Szegedi
            Assignee: Miklos Szegedi
            Priority: Trivial

The container executor configuration reader does not handle white spaces or 
malformed key value pairs in the config file correctly or gracefully
as an example the following key value line which is part of the configuration 
(note the << is used as a marker to show the extra trailing space):
yarn.nodemanager.linux-container-executor.group=yarn <<
is a valid line but when you run the check over the file:
[root@test]#./container-executor --checksetup
Can't get group information for yarn - Success.
It fails to find the yarn group but it really tries to find the "yarn " group 
which fails. There is no trimming anywhere while processing the lines. If a 
space would be added in before or after the = sign a failure would also occur.
Minor nit is the fact that a failure still is logged as a Success

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