Chesnay Schepler created FLINK-6554:
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Summary: CompatibilityResult should contain a notCompatible()
option
Key: FLINK-6554
URL: https://issues.apache.org/jira/browse/FLINK-6554
Project: Flink
Issue Type: Improvement
Components: Type Serialization System
Affects Versions: 1.3.0, 1.4.0
Reporter: Chesnay Schepler
Priority: Minor
The {CompatibilityResult} allows a {TypeSerializer} to specify whether it is
compatible based on the given {TypeSerializerConfigSnapshot}.
As it stands the only options are {compatible} and {requiresMigration}. We
should allow serializers to also notify the system of an incompatibility which
should then fail the job.
This would for example be required when a serializer provides an upgrade path
version1 -> version2 -> version3, but not directly from version1 -> version3.
Currently, the serializer would either have to contain logic to upgrade from
every single previous version or simply throw an exception on it's own.
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