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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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)