Zhankun Tang created YARN-9464:
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Summary: Support "Pending Resource" metrics in RM's RESTful API
Key: YARN-9464
URL: https://issues.apache.org/jira/browse/YARN-9464
Project: Hadoop YARN
Issue Type: Improvement
Reporter: Zhankun Tang
Knowing only the "available", "used" resource is not enough for YARN management
tools like auto-scaler. It would be helpful to diagnose the cluster resource
utilization if it get "Pending Resource" from RM RESTful APIs. In a certain
extent, it represents how starving the applications are.
Initially, we can add "pending resource" information in below two RM REST APIs:
{code:java}
RMnode:port/ws/v1/cluster/metrics
RMnode:port/ws/v1/cluster/metrics/nodes
{code}
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