Exception: No qualifying bean of type 'org.springframework.boot.autoconfigure.http.HttpMessageConverters' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations:

Describe the bug

Exception: No qualifying bean of type 'org.springframework.boot.autoconfigure.http.HttpMessageConverters' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations:

Sample

Currently we are facing above issue while calling runtime objects conversion to call endpoints by using FeignClient / RestClient as well.

•    <spring-cloud.version>2025.0.0</spring-cloud.version>
  

•     <io-aws-spring-version>3.4.0</io-aws-spring-version>
  

•     <spring-boot.version>3.5.4</spring-boot.version>
  

Feign Client :

<groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-openfeign</artifactId>
<version>4.3.0</version>

While initially using Spring Boot 3.5.0, my application suddenly required the property spring.main.allow-bean-definition-overriding=true to start the server. Despite attempting various encoder and decoder techniques, the issue remains unresolved.

Below property now asking mandatory true i don't know what is the reason behind this.

spring :
main:
allow-bean-definition-overriding: true

I thought initially feign client issue I have started using RestClient even though while calling endpoint same issue remain as is .

Start by reproducing the bean-creation failure with the listed Spring Boot, Spring Cloud OpenFeign, and AWS Spring versions, using both FeignClient and RestClient endpoint calls. Investigate why HttpMessageConverters is unavailable and why spring.main.allow-bean-definition-overriding is required; done means the application starts and runtime object conversion succeeds without that workaround.