Jason Lowe created YARN-5290:
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Summary: ResourceManager can place more containers on a node than
the node size allows
Key: YARN-5290
URL: https://issues.apache.org/jira/browse/YARN-5290
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Reporter: Jason Lowe
When the ResourceManager or an ApplicationMaster kills a container the RM
scheduler instantly thinks the container is dead and frees those resources
within the scheduler bookkeeping. However that container can still be running
on the node until the node heartbeats back into the RM and is told to kill the
container. If the RM allocates the space associated with the released
container and gives it to an AM quickly enough, the AM can launch a new
container while the old container is still running on the NM. That leads to a
scenario where we're technically running more resources on the node than the
node advertised to the RM.
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