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

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: API / Type Serialization System, Runtime / State Backends, Tests
• Assignee: Igal Shilman
• Reporter: Tzu-Li (Gordon) Tai
• Created: 18/Jun/18 05:04
• Updated: 31/Oct/18 05:57
• Resolved: 31/Oct/18 05:57

Description

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.

Issue Links

• is duplicated by: FLINK-10708 Implement a SerializerMigrationTestBase