[jira] [Reopened] (YARN-2194) Cgroups cease to work in RHEL7

["Sidharta Seethana (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-2194?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sidharta Seethana reopened YARN-2194:
-------------------------------------

[~ywskycn] , [~vvasudev]

So, it looks like the final version of the patch that was eventually committed didn't actually go through jenkins ( wasn't submitted to jenkins or something else went wrong during submission ). There seems to be a test failing that needs to be fixed ( see below ) 

{code}
testSquashCGroupOperationsWithValidOperations(org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.TestPrivilegedOperationExecutor)  Time elapsed: 0.178 sec  <<< FAILURE!
org.junit.ComparisonFailure: expected:<...n/container_01/tasks[,net_cls/hadoop_yarn/container_01/tasks,]blkio/hadoop_yarn/co...> but was:<...n/container_01/tasks[%net_cls/hadoop_yarn/container_01/tasks%]blkio/hadoop_yarn/co...>
at org.junit.Assert.assertEquals(Assert.java:115)
at org.junit.Assert.assertEquals(Assert.java:144)
at org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.TestPrivilegedOperationExecutor.testSquashCGroupOperationsWithValidOperations(TestPrivilegedOperationExecutor.java:225)
{code}

thanks,
-Sidharta

> 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
>             Fix For: 2.8.0
>
>         Attachments: YARN-2194-1.patch, YARN-2194-2.patch, YARN-2194-3.patch, YARN-2194-4.patch, YARN-2194-5.patch, YARN-2194-6.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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