See the older migration guide for information about migrating from older versions than Flink 1.3.
This would be relevant mostly for users implementing custom
TypeSerializers for their state.
TypeSerializerConfigSnapshot abstraction is now deprecated, and will be fully removed in the future
in favor of the new
TypeSerializerSnapshot. For details and guides on how to migrate, please see
Migrating from deprecated serializer snapshot APIs before Flink 1.7.