As explained in the its reference documentation, Spring Boot provides a spring-boot-autoconfigure-processor.

This should be added as an optional dependency to the module that contains the AutoConfiguration classes (and contains the spring.factories file declaring them).

Once configured, this annotation processor will generate metadata at compile time and will help Spring Boot process those auto-configurations without loading the actual classes in some cases.

In this project, the spring-cloud-openfeign-core module declares auto-configurations but doesn't use this annotation processor. Could you add it to the build file of this module?

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

Once added, this should generate a spring-autoconfigure-metadata.properties file in the target/classes/META-INF folder.

See https://github.com/spring-cloud/spring-cloud-commons/issues/377

Comment From: ryanjbaxter

I thought I added this to all of our projects but I must have missed this one, thanks!

Comment From: hexiaogou

As explained in the its reference documentation, Spring Boot provides a spring-boot-autoconfigure-processor.

This should be added as an optional dependency to the module that contains the AutoConfiguration classes (and contains the spring.factories file declaring them).

Once configured, this annotation processor will generate metadata at compile time and will help Spring Boot process those auto-configurations without loading the actual classes in some cases.

In this project, the spring-cloud-openfeign-core module declares auto-configurations but doesn't use this annotation processor. Could you add it to the build file of this module?

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

Once added, this should generate a spring-autoconfigure-metadata.properties file in the target/classes/META-INF folder.

See spring-cloud/spring-cloud-commons#377

Thank you for your advice to the author, so the spring-autoconfigure-metadata.properties contained the feign configuration information ever since Finchley.SR2 version. I found this problem when I used IDEA IDE for studing Spring-Cloud-Feign knowledge with no auto tip during setting application.yml.