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https://issues.apache.org/jira/browse/FLINK-6944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tzu-Li (Gordon) Tai updated FLINK-6944:
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Fix Version/s: (was: 1.7.0)
> Introduce DefaultTypeSerializerConfigSnapshot as a base implementation for
> serializer compatibility checks
> ----------------------------------------------------------------------------------------------------------
>
> Key: FLINK-6944
> URL: https://issues.apache.org/jira/browse/FLINK-6944
> Project: Flink
> Issue Type: Sub-task
> Components: State Backends, Checkpointing, Type Serialization System
> Affects Versions: 1.3.0, 1.3.1
> Reporter: Tzu-Li (Gordon) Tai
> Priority: Critical
>
> FLINK-9377 proposes to remove writing serializers as part of checkpoint meta
> info, and only write its configuration snapshot.
> Since then serializer config snapshots will be the single source of truth for
> previous serializer schema, this JIRA proposes to follow up the change in
> FLINK-9377 by having a base default implementation for letting
> {{TypeSerializer.snapshotConfiguration}} that returns a
> {{DefaultTypeSerializerConfigSnapshot}}.
> The {{DefaultTypeSerializerConfigSnapshot}} should wrap the serialVersionUID
> of the serializer class, and the serializer class' classname. The latter two
> will be used to check compatibility in the default implementation of
> {{TypeSerializer.ensureCompatibility}}. Specifically, if classname /
> serialVersionUID has changed, the default implementation of
> {{TypeSerializer.ensureCompatibility}} should return
> {{CompatibilityResult.requiresMigration}}.
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