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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