lucasbru opened a new pull request, #20412:
URL: https://github.com/apache/kafka/pull/20412
In KAFKA-19570 we implemented offline migration between groups, that is, the
following integration test or system test should be possible:
Test A:
- Start a streams application with classic protocol, process up to a
certain offset and commit the offset and shut down.
- Start the same streams application with streams protocol (same app ID!).
- Make sure that the offsets before the one committed in the first run are
not reprocessed in the second run.
Test B:
- Start a streams application with streams protocol, process up to a
certain offset and commit the offset and shut down.
- Start the same streams application with classic protocol (same app ID!).
- Make sure that the offsets before the one committed in the first run are
not reprocessed in the second run.
We have unit tests that make sure that non-empty groups will not be
converted. This should be enough.
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