Matthias J. Sax created KAFKA-20697:
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Summary: Add cross-version system tests
Key: KAFKA-20697
URL: https://issues.apache.org/jira/browse/KAFKA-20697
Project: Kafka
Issue Type: Sub-task
Components: streams, system tests
Reporter: Matthias J. Sax
Fix For: 4.4.0
With AK 4.4 release, we bump the HB request/response RPCs to `1`, and start to
send certain fields if both client and server are on version 4.4+.
To ensure that nothing breaks, we need to test older clients against 4.4+
brokers, to ensure that no warmup tasks are assigned (an 4.2/4.3 client won't
report lag information and should never get warmup task assigned) even if
configured for the group. – We should also think about other compatibility
scenarios to cover?
Similarly, we should run a 4.4+ client against 4.2/4.3 brokers, to verify that
it works as expected. The 4.4+ client should not send a bad request which might
fail broker side.
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