Boyang Chen created KAFKA-7899:
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Summary: Command line tool to invalidate group metadata for clean
assignment
Key: KAFKA-7899
URL: https://issues.apache.org/jira/browse/KAFKA-7899
Project: Kafka
Issue Type: New Feature
Components: consumer, streams
Affects Versions: 1.1.0
Reporter: Boyang Chen
Assignee: Boyang Chen
Right now the group metadata will affect consumers under sticky assignment,
since it persists previous topic partition assignment which affects the
judgement of consumer leader. Specifically for KStream applications (under
1.1), if we are scaling up the cluster, it is hard to balance the traffic since
most tasks would still go to "previous round active" assignments, even though
we hope them to move towards other hosts.
It would be preferable to have a tool to invalidate the group metadata stored
on broker, so that for sticky assignment we could have a clean start.
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