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

["Tzu-Li (Gordon) Tai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tzu-Li (Gordon) Tai reassigned FLINK-6554:
------------------------------------------

    Assignee: Tzu-Li (Gordon) Tai

> 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
>            Assignee: Tzu-Li (Gordon) Tai
>            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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