Colin McCabe created KAFKA-17434:
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Summary: upgrade_test.py tests impossible upgrade scenarios
Key: KAFKA-17434
URL: https://issues.apache.org/jira/browse/KAFKA-17434
Project: Kafka
Issue Type: Bug
Reporter: Colin McCabe
Assignee: Colin McCabe
Because of KIP-902 (Upgrade Zookeeper version to 3.8.2), it is not possible to
upgrade from a Kafka version earlier than 3.5 to a version later than 3.5.
Therefore, we should not test these upgrade scenarios in upgrade_test.py. They
do happen to work sometimes, but only in the trivial case where we don't create
topics or make changes during the upgrade (which would reveal the ZK
incompatibility).
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