Omer van Kloeten created KAFKA-8553:
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Summary: Kafka Connect Schema Compatibility Checks for Name Changes
Key: KAFKA-8553
URL: https://issues.apache.org/jira/browse/KAFKA-8553
Project: Kafka
Issue Type: Bug
Components: KafkaConnect
Reporter: Omer van Kloeten
{{SchemaProjector.checkMaybeCompatible}} checks whether the Connect schema is
compatible with another one. This is used for projection when using
{{schema.compatibility}}.
Unfortunately, nowhere is it documented that if you change the name of the
schema, this would break compatibility entirely.
For instance, the following two Avro schemas are fully compatible, but Connect
says they're not:
{{{}}
{{ "type": "record",}}
{{ "name": "Foo1",}}
{{ "namespace":"example",}}
{{ "fields": [}}
{{ ]}}
{{ }}}
{{{}}
{{ "type": "record",}}
{{ "name": "Foo2",}}
{{ "namespace":"example",}}
{{ "fields": [}}
{{ {"name": "bar", "type": ["null", "string"]}}}
{{ ]}}
{{}}}
This is either the expected behavior and is not documented or unexpected
behavior and is a bug.
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