Federico Valeri created KAFKA-15537:
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Summary: Unsafe metadata.version downgrade is not supported
Key: KAFKA-15537
URL: https://issues.apache.org/jira/browse/KAFKA-15537
Project: Kafka
Issue Type: Bug
Reporter: Federico Valeri
In KIP-778 we introduced the "unsafe" downgrade functionality in case one of
the metadata versions between current and target have changes, as defined in
MetadataVersion. This is a lossy downgrade where each node rebuilds its
metadata snapshots, omitting the new metadata fields. Currently, this is not
supported, as shown by the following command.
{code}
bin/kafka-features.sh --bootstrap-server :9092 downgrade --metadata 3.4 --unsafe
Could not downgrade metadata.version to 8. Invalid metadata.version 8.
Unsafe metadata downgrade is not supported in this version.
1 out of 1 operation(s) failed.
{code}
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