Project in Spring Tool Suite report "Unable to load annotation processor factory"

Question

My project in Spring Tool Suite report Unable to "load annotation processor factory 'org.springframework.boot.configurationprocessor.ConfigurationMetadataAnnotationProcessor' for project XXX", My project runs fine, but I do not want to see this error.I did a lot of searching, but I could not find any result. Thanks a lot.

Answer 1

Delete the .factory file from the project root directory.

Answer 2

You need to add the spring boot configuration processor to your project; when using maven add this dependency:

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-configuration-processor</artifactId>
  <optional>true</optional>
</dependency>

You find more information in the spring boot documentation.