Details
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Improvement
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Status: Resolved
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Minor
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Resolution: Fixed
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2.7.3, 3.0.0-alpha1, 3.0.0-alpha2
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None
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None
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Reviewed
Description
Yarn can be launched with linux-container-executor.cgroups.mount set to false. It will search for the cgroup mount paths set up by the administrator parsing the /etc/mtab file. You can also specify resource.percentage-physical-cpu-limit to limit the CPU resources assigned to containers.
linux-container-executor.cgroups.hierarchy is the root of the settings of all YARN containers. If this is specified but not created YARN will fail at startup:
Caused by: java.io.FileNotFoundException: /cgroups/cpu/hadoop-yarn/cpu.cfs_period_us (Permission denied)
org.apache.hadoop.yarn.server.nodemanager.util.CgroupsLCEResourcesHandler.updateCgroup(CgroupsLCEResourcesHandler.java:263)
This JIRA is about automatically creating YARN control group in the case above. It reduces the cost of administration.