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https://issues.apache.org/jira/browse/YARN-10048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17000626#comment-17000626
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Sen Zhao commented on YARN-10048:
---------------------------------
Hi, [~tangzhankun]. Right, if the cpu controller mounts multiple paths, it
will return the first path about parsedMtab.
eg:
{code:java}
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup
(rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)
none on /opt/cgroup/cpu type cgroup (rw,relatime,cpuacct,cpu)
{code}
Sometimes it will return */sys/fs/cgroup/cpu* instead of */opt/cgroup/cpu*
related to the configuration
> NodeManager fails to start after mounting CGroup
> ------------------------------------------------
>
> Key: YARN-10048
> URL: https://issues.apache.org/jira/browse/YARN-10048
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 3.2.1
> Reporter: Sen Zhao
> Assignee: Sen Zhao
> Priority: Major
> Attachments: YARN-10048.001.patch, YARN-10048.002.patch
>
>
> After manually mounting the Cgroup, the NodeManager fails to start.
> If the cpu controller has multiple mount path, only the first mount path will
> be returned. This will cause the return value to be not the actual cpu
> controller mount path.
> {code:java}
> 2019-12-19 14:46:08,200 INFO
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandlerImpl:
> Mounting controller cpu at /opt/cgroup/cpu
> 2019-12-19 14:46:08,290 WARN
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged.PrivilegedOperationExecutor:
> Shell execution returned exit code: 32. Privileged Execution Op
> eration Stderr:
> Feature disabled: mount cgroup
> Stdout:
> Full command array for failed execution:
> [/opt/hadoop-yarn/bin/container-executor, --mount-cgroups,
> yarn-NodeManager/hadoop-yarn, cpu,cpuacct=/opt/cgroup/cpu]
> 2019-12-19 14:46:08,290 ERROR
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandlerImpl:
> Failed to mount controller: cpu
> 2019-12-19 14:46:08,291 ERROR
> org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor: Failed to
> bootstrap configured resource subsystems!
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.ResourceHandlerException:
> Failed to mount controller: cpu
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandlerImpl.mountCGroupController(CGroupsHandlerImpl.java:318)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsHandlerImpl.initializeCGroupController(CGroupsHandlerImpl.java:365)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsCpuResourceHandlerImpl.bootstrap(CGroupsCpuResourceHandlerImpl.java:98)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.CGroupsCpuResourceHandlerImpl.bootstrap(CGroupsCpuResourceHandlerImpl.java:87)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources.ResourceHandlerChain.bootstrap(ResourceHandlerChain.java:58)
> at
> org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor.init(LinuxContainerExecutor.java:325)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:403)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:962)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:1042)
> {code}
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