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From "Miklos Szegedi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5301) NM mount cpu cgroups failed on some system
Date Wed, 29 Mar 2017 19:34:41 GMT

     [ https://issues.apache.org/jira/browse/YARN-5301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Miklos Szegedi updated YARN-5301:
    Attachment: YARN-5301.000.patch

The attached patch fixes the issue by identifying any premounted cgroups and the subsystem
set for each mount point. If the user specifies the mount option that means that the existing
mount point might not be usable (access, design, etc.), so we remount it with the existing
subsystem set (cpu, cpuacct in most cases). I tested it on CentOS6, Ubuntu16 with kernel 4.4.
I am testing it on RHEL7 now.
I also updated the unit tests and fixed a few compiler warnings in those files.

> NM mount cpu cgroups failed on some system
> ------------------------------------------
>                 Key: YARN-5301
>                 URL: https://issues.apache.org/jira/browse/YARN-5301
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: sandflee
>            Assignee: Miklos Szegedi
>         Attachments: YARN-5301.000.patch
> on ubuntu  with linux kernel 3.19, , NM start failed if enable auto mount cgroup. try
> ./bin/container-executor --mount-cgroups yarn-hadoop cpu=/cgroup/cpu    fail
> ./bin/container-executor --mount-cgroups yarn-hadoop cpu,cpuacct=/cgroup/cpu    succ

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