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https://issues.apache.org/jira/browse/MAPREDUCE-4306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13293799#comment-13293799
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Tom White commented on MAPREDUCE-4306:
--------------------------------------
{noformat}
+ try {
+ amUser = cliParser.getOptionValue("user", UserGroupInformation
+ .getCurrentUser().getShortUserName());
+ } catch (IOException e) {
+ LOG.info("Getting current user info failed" + e.getMessage());
+ }
{noformat}
If a user has been specified on the command line then there is no need to find
the current user. In fact, if the current user can't be found then {{amUser}}
won't be set. (Also, there's a space missing in the info line.)
It's probably worth going through where user values are null or the empty
string to check they are correct (e.g. on ContainerLaunchContext#setUser).
> Problem running Distributed Shell applications as a user other than the one
> started the daemons
> -----------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4306
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4306
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 2.0.0-alpha
> Reporter: Ahmed Radwan
> Assignee: Ahmed Radwan
> Fix For: 2.0.1-alpha
>
> Attachments: MAPREDUCE-4306.patch
>
>
> Using the tarball, if you start the yarn daemons using one user and then
> switch to a different user. You can successfully run MR jobs, but DS jobs
> fail to run. Only able to run DS jobs using the user who started the daemons.
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