Spring Boot REST API: Inconsistent JSON Serialization for LocalDate fields with Jackson
I'm performance testing and I'm working with an scenario with my Spring Boot REST API where the serialization of `LocalDate` fields in my response JSON is inconsistent. Sometimes, the dates are returned in the format `"yyyy-MM-dd"`, while at other times, they appear as `"yyyy/MM/dd"`. This inconsistency is causing issues on the client side when parsing the responses. I am using Spring Boot 2.5.0 and Jackson 2.12.3. I've tried configuring the date format globally in my application properties with: ```properties spring.jackson.date-format=yyyy-MM-dd ``` However, this does not seem to resolve the scenario. I also attempted to create a custom serializer by annotating my `LocalDate` fields with `@JsonSerialize`, but that didn’t yield the expected results. Here’s an example of my entity class: ```java @Entity public class Event { @Id private Long id; @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd") private LocalDate eventDate; // other fields, getters, and setters } ``` Even with the `@JsonFormat` annotation, I still encounter situations where the date format gets altered. Additionally, I've checked the dependencies and ensured that there are no conflicting versions of Jackson in my `pom.xml`. What could be causing this inconsistency in date serialization, and how can I achieve a consistent output for `LocalDate` fields across all responses in my REST API? My development environment is Debian. What are your experiences with this?