Lucas Brutschy created KAFKA-19661:
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Summary: Streams groups sometimes describe as NOT_READY when STABLE
Key: KAFKA-19661
URL: https://issues.apache.org/jira/browse/KAFKA-19661
Project: Kafka
Issue Type: Sub-task
Reporter: Lucas Brutschy
Assignee: Lucas Brutschy
Streams groups sometimes describe as NOT_READY when STABLE. That is, the group
is configured and all topics exist, but when you use LIST_GROUP and
STREAMS_GROUP_DESCRIBE, the group will show up as not ready.
The root cause seems to be that [https://github.com/apache/kafka/pull/19802]
moved the creation of the soft state configured topology from the replay path
to the heartbeat. This way, LIST_GROUP and STREAMS_GROUP_DESCRIBE, which show
the snapshot of the last committed offset, may not show the configured
topology, and therefore assume that the streams group is NOT_READY instead of
STABLE.
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