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https://issues.apache.org/jira/browse/YARN-7810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16434501#comment-16434501
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Eric Badger commented on YARN-7810:
-----------------------------------

[~eyang], [~shaneku...@gmail.com], can we backport this through 2.9? YARN-7782 
was committed to all of those branches, so the unit tests are broken for all of 
them. 

> TestDockerContainerRuntime test failures due to UID lookup of a non-existent 
> user
> ---------------------------------------------------------------------------------
>
>                 Key: YARN-7810
>                 URL: https://issues.apache.org/jira/browse/YARN-7810
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Shane Kumpf
>            Assignee: Shane Kumpf
>            Priority: Major
>             Fix For: 3.1.0
>
>         Attachments: YARN-7810.001.patch, YARN-7810.002.patch
>
>
> YARN-7782 enabled the Docker runtime feature to remap the username to uid:gid 
> form for launching Docker containers. The feature does an {{id -u}} and {{id 
> -G}} to get the UID and GIDs. This fails with the test user, as that user 
> doesn't actually exist on the host.
> {code:java}
> [ERROR] 
> testContainerLaunchWithCustomNetworks(org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.TestDockerContainerRuntime)
>   Time elapsed: 0.411 s  <<< ERROR!
> org.apache.hadoop.yarn.server.nodemanager.containermanager.runtime.ContainerExecutionException:
>  
> ExitCodeException exitCode=1: id: 'run_as_user': no such user
>       at 
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.DockerLinuxContainerRuntime.getUserIdInfo(DockerLinuxContainerRuntime.java:711)
>       at 
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.DockerLinuxContainerRuntime.launchContainer(DockerLinuxContainerRuntime.java:757)
>       at 
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.TestDockerContainerRuntime.testContainerLaunchWithCustomNetworks(TestDockerContainerRuntime.java:599){code}



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