[jira] [Created] (FLINK-9608) Add test base for TypeSerializer snapshotting / restore / migration to be used by all Flink serializers

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

Tzu-Li (Gordon) Tai created FLINK-9608:
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             Summary: Add test base for TypeSerializer snapshotting / restore / migration to be used by all Flink serializers
                 Key: FLINK-9608
                 URL: https://issues.apache.org/jira/browse/FLINK-9608
             Project: Flink
          Issue Type: Test
          Components: State Backends, Checkpointing, Tests, Type Serialization System
            Reporter: Tzu-Li (Gordon) Tai
            Assignee: Tzu-Li (Gordon) Tai
             Fix For: 1.6.0


The current {{TypeSerializerTestBase}} does not cover several aspects related to upgrading / snapshotting and restoring Flink's serializers. That includes:

- A serializer can be snapshotted and then restored without issues. The restored serializer should be able to correctly read data written by the snapshotted serializer.
- A serializer's snapshotted configuration can be migrated from previous Flink versions.
- A serializer works with different kinds of state backends.

This new proposed test base should go into {{flink-tests}}, with a coverage check that all Flink's {{TypeSerializers}} have a corresponding subclass for the test base.



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