José Armando García Sancio created KAFKA-19021:
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Summary: Broker should not be allowed to be promoted to controller
Key: KAFKA-19021
URL: https://issues.apache.org/jira/browse/KAFKA-19021
Project: Kafka
Issue Type: Sub-task
Components: kraft
Reporter: José Armando García Sancio
Assignee: José Armando García Sancio
It is possible for the user to add broker as a controller by using
"kafka-metadata-quorum add-controller". This can be fixed by having the
controller check the set of RPC exposed in the ApiVersion response.
The leader already makes a call to ApiVersion to check the kraft.version of the
new controller. The leader should extend this check to make sure that the node
also supports all of the KRaft RPCs. That includes Vote, FetchSnapshot,
BeginQuorum, EndQuorum, etc.
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