[jira] [Created] (FLINK-6554) CompatibilityResult should contain a notCompatible() option

["Chesnay Schepler (JIRA)" <ji...@apache.org>]

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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