[jira] [Created] (FLINK-9013) Document yarn.containers.vcores only being effective when adapting YARN config

["Nico Kruber (JIRA)" <ji...@apache.org>]

Nico Kruber created FLINK-9013:
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             Summary: Document yarn.containers.vcores only being effective when adapting YARN config
                 Key: FLINK-9013
                 URL: https://issues.apache.org/jira/browse/FLINK-9013
             Project: Flink
          Issue Type: Improvement
          Components: Documentation, YARN
    Affects Versions: 1.5.0, 1.6.0
            Reporter: Nico Kruber
            Assignee: Nico Kruber
             Fix For: 1.5.0, 1.6.0


Even after specifying {{yarn.containers.vcores}} and having Flink request such a container from YARN, it may not take these into account at all and return a container with 1 vcore.

The YARN configuration needs to be adapted to take the vcores into account, e.g. by setting the {{FairScheduler}} in {{yarn-site.xml}}:
{code}
<property>
  <name>yarn.resourcemanager.scheduler.class</name>
  <value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler</value>
</property>
{code}

This fact should be documented at least at the configuration parameter documentation of  {{yarn.containers.vcores}}.



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