[
https://issues.apache.org/jira/browse/YARN-2809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309905#comment-14309905
]
Hadoop QA commented on YARN-2809:
---------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12697110/YARN-2809-v3.patch
against trunk revision c1957fe.
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 1 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager.
Test results:
https://builds.apache.org/job/PreCommit-YARN-Build/6538//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/6538//console
This message is automatically generated.
> Implement workaround for linux kernel panic when removing cgroup
> ----------------------------------------------------------------
>
> Key: YARN-2809
> URL: https://issues.apache.org/jira/browse/YARN-2809
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 2.6.0
> Environment: RHEL 6.4
> Reporter: Nathan Roberts
> Assignee: Nathan Roberts
> Attachments: YARN-2809-v2.patch, YARN-2809-v3.patch, YARN-2809.patch
>
>
> Some older versions of linux have a bug that can cause a kernel panic when
> the LCE attempts to remove a cgroup. It is a race condition so it's a bit
> rare but on a few thousand node cluster it can result in a couple of panics
> per day.
> This is the commit that likely (haven't verified) fixes the problem in linux:
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?h=linux-2.6.39.y&id=068c5cc5ac7414a8e9eb7856b4bf3cc4d4744267
> Details will be added in comments.
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