Matthew Jacobs commented on YARN-2194:

While this may work for the default RHEL7 configuration, this will break if 
someone happens to have mounted the same controllers to 
"/sys/fs/cgroup/cpuacct,cpu", or if the user mounted other controllers at the 
same path as well. What do you think about creating the symlink from 
"/sys/fs/cgroup/cpu" to the mounted path for cpu in all cases (unless it was 
actually mounted at /sys/fs/cgroup/cpu of course).

> Cgroups cease to work in RHEL7
> ------------------------------
>                 Key: YARN-2194
>                 URL: https://issues.apache.org/jira/browse/YARN-2194
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.7.0
>            Reporter: Wei Yan
>            Assignee: Wei Yan
>            Priority: Critical
>         Attachments: YARN-2194-1.patch, YARN-2194-2.patch, YARN-2194-3.patch
> In RHEL7, the CPU controller is named "cpu,cpuacct". The comma in the 
> controller name leads to container launch failure. 
> RHEL7 deprecates libcgroup and recommends the user of systemd. However, 
> systemd has certain shortcomings as identified in this JIRA (see comments). 
> This JIRA only fixes the failure, and doesn't try to use systemd.

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