Botong Huang created YARN-8697:
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Summary: LocalityMulticastAMRMProxyPolicy should fallback to
random sub-cluster when cannot resolve resource
Key: YARN-8697
URL: https://issues.apache.org/jira/browse/YARN-8697
Project: Hadoop YARN
Issue Type: Task
Reporter: Botong Huang
Assignee: Botong Huang
Right now in LocalityMulticastAMRMProxyPolicy, whenever we cannot resolve the
resource name (node or rack), we always route the request to home sub-cluster.
However, home sub-cluster might not be always be ready to use (timed out
YARN-8581) or enabled (by AMRMProxyPolicy weights). It might also be
overwhelmed by the requests if sub-cluster resolver has some issue. In this
Jira, we are changing it to pick a random active and enabled sub-cluster for
resource request we cannot resolve.
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