[FLINK-35302] Flink REST server throws exception on unknown fields in RequestBody

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.19.0
• Fix Version/s: 1.20.0
• Component/s: Runtime / REST
• Labels: pull-request-available
• Assignee: Juntao Hu
• Reporter: Juntao Hu
• Created: 07/May/24 02:36
• Updated: 14/May/24 01:58
• Resolved: 13/May/24 07:23

Description

As FLIP-401 and FLINK-33268 mentioned, when an old version REST client receives response from a new version REST server, with strict JSON mapper, the client will throw exceptions on newly added fields, which is not convenient for situations where a centralized client deals with REST servers of different versions (e.g. k8s operator).

But this incompatibility can also happens at server side, when a new version REST client sends requests to an old version REST server with additional fields. Making server flexible with unknown fields can save clients from backward compatibility code.

Issue Links

• is related to: FLINK-33268 Flink REST API response parsing throws exception on new fields
• links to: GitHub Pull Request #24759