[FLINK-29016] Clarify Kryo limitations w.r.t. schema evolution

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.16.0
• Component/s: API / Type Serialization System
• Assignee: Chesnay Schepler
• Reporter: Chesnay Schepler
• Created: 17/Aug/22 16:26
• Updated: 24/Aug/22 07:40
• Resolved: 24/Aug/22 07:40

Description

While the schema evolution docs do state that Kryo isn't supported for schema evolution they don't really convey the gravity of the situation.
They should clarify that if Kryo is used for anything, even some data-structure containing POJOs (like an ArrayList, scala option/collection), that schema evolution will not be possible.

Issue Links

• relates to: FLINK-29030 Print a log message if a Pojo/Tuple contains a generic type