[FLINK-24210] Window related serailizer should not return 0 as its serialized length

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.15.0
• Component/s: API / Type Serialization System, Runtime / State Backends
• Labels: pull-request-available stale-assigned
• Assignee: Jinzhong Li
• Reporter: Yun Tang
• Created: 08/Sep/21 09:56
• Updated: 20/Jan/22 02:52
• Resolved: 20/Jan/22 02:51

Description

TimeWindow serializer return 0 as its length for serialization, this is certatinately not correct.

public static class Serializer extends TypeSerializerSingleton<TimeWindow> {
....
        @Override
        public int getLength() {
            return 0;
        }
}

Current namespace serializer in state backend does not depends on this interface so that no obvious bug has ever reported.

Moreover, this bug also occurs in other window related serializer.

Issue Links

• is duplicated by: FLINK-24797 GlobalWindow.Serializer#getLength() provides a wrong length.
• links to: GitHub Pull Request #17720