Created a new Spring Initializer java 17 gradle project in IntelliJ using Spring Boot version 3.0.2. Included Spring Web and Spring Boot Actuator.
Did the same using Spring Boot version 2.7.8.
Both projects have the following in application.properties
management.endpoints.web.exposure.include=info management.info.build.enabled=true spring.jackson.serialization.indent-output=true
When requesting /actuator/info for version 3.0.2 project, the JSON is not indented or pretty printed. The same request for version 2.7.8 project returns pretty printed and indented JSON.
Everything is left default, no code additions, config changes. etc. Just plain vanilla out of the box project.
Is this a bug in Spring Boot version 3?
Expected the JSON response to be pretty printed and indented as per the Spring documentation for the Application Properties settings.
This is also posted in Stackoverflow (https://stackoverflow.com/questions/75221023/spring-boot-3-actuator-indentation-not-working). Seems there are other experiencing the same behaviour.
Comment From: bclozel
This has been done on purpose in #20291 and is also documented in the migration guide.
I'm closing this issue as a result. Let us know if the migration guide is missing information on how to work things out on your side. Thanks!