Guozhang Wang created KAFKA-2721:
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Summary: Avoid handling duplicate LeaderAndISR requests
Key: KAFKA-2721
URL: https://issues.apache.org/jira/browse/KAFKA-2721
Project: Kafka
Issue Type: Bug
Reporter: Guozhang Wang
Fix For: 0.9.0.1
Upon controller migration, the new controller will try to resend all the
LeaderAndISR requests for any on-going partition reassignments. This can then
lead to duplicate such requests sent to the same broker.
Upon receiving such requests, today brokers do not detect if, for example, it
is already the leader for the requested becoming-leader-partition, and does the
logic such as 1) stop fetching 2) coordinator migration, etc which is not
necessary.
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