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Current state: "Under Discussion"

Discussion thread: here

JIRA: KAFKA-4585

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

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As I was experimenting with the ACLs for this KIP I made some observations that made me wonder about the rationale behind their current ACL settings; and whether they need adjustments too: 

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• Users can see all groups in the cluster (using consumer group’s --list option)

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• provided that they have Describe access to the cluster. Would it make sense to modify that experience and limit what is listed in the output to only those groups they have Describe access to? The reason is, almost anything else is accessible by a user only if the access is specifically granted (through ACL --add); and this scenario should not be an exception. The potential change would be updating the minimum required permission of ListGroup from Describe (Cluster) to Describe (Group). 

Compatibility, Deprecation, and Migration Plan

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