API 迁移指南

See the older migration guide for information about migrating from older versions than Flink 1.3.

API changes for serializer snapshots

This would be relevant mostly for users implementing custom TypeSerializers for their state.

The old 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.

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