David Arthur created KAFKA-15799:
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Summary: ZK brokers incorrectly handle KRaft metadata snapshots
Key: KAFKA-15799
URL: https://issues.apache.org/jira/browse/KAFKA-15799
Project: Kafka
Issue Type: Bug
Reporter: David Arthur
Assignee: David Arthur
Fix For: 3.6.1
While working on the fix for KAFKA-15605, I noticed that ZK brokers are
unconditionally merging data from UpdateMetadataRequest with their existing
MetadataCache. This is not the correct behavior when handling a metadata
snapshot from the KRaft controller.
For example, if a topic was deleted in KRaft and not transmitted as part of a
delta update (e.g., during a failover) then the ZK brokers will never remove
the topic from their cache (until they restart and rebuild their cache).
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