liu bin created YARN-11871:
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Summary: Make client retry when no active sub-cluster available
Key: YARN-11871
URL: https://issues.apache.org/jira/browse/YARN-11871
Project: Hadoop YARN
Issue Type: Improvement
Components: federation
Reporter: liu bin
Under the YARN Federation architecture, when there's only one sub-cluster, or
when multiple sub-clusters exist but a queue is configured to submit
exclusively to a specific sub-cluster, the following problem occurs: If this
target sub-cluster failover, its state will remain "non-active" until the new
active RM completes registration and sends the first heartbeat (default 30
seconds later). During this window, any client attempting to submit
applications will fail with the error: "No active SubCluster available to
submit the request" or "No positive weight found on active subclusters".
In non-YARN Federation setups, clients automatically retry during RM failover.
We expect this retry behavior to be preserved when transitioning to the YARN
Federation architecture.
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