I have this following configuration class where I generate all of my beans, everything worked perfectly until I needed a second instance of a same bean:

@Configuration
@EnableScheduling
@EnableConfigurationProperties({
  ConfigA.class,
  ConfigB.class,
  ConfigC.class
})
public class ApplicationConfiguration {

  @Bean("externalApiClient")
  WebClient externalApiClient(ConfigA configA) {

    WebClient webClient =
        WebClient.builder()
            .baseUrl(configA.getApiBaseUrl())
            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
            .build();

    return webClient;
  }

  @Bean("selfApiClient")
  WebClient selfApiClient(ConfigA configA) {

    WebClient webClient =
        WebClient.builder()
            .baseUrl(configA.getBaseUrl())
            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
            .build();

    return webClient;
  }
}

And the following is my service which makes use of the two beans through constructor injection:

@Service
public class MyService {

  private final WebClient selfApiClient;
  private final WebClient externalApiClient;

  public MyService(
      @Qualifier("selfApiClient") WebClient selfApiClient,
      @Qualifier("externalApiClient") WebClient externalApiClient) {
    this.selfApiClient = selfApiClient;
    this.externalApiClient = externalApiClient;
  }
}

Which results in the following error, while everything worked before I needed the second instance:

org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type ‘org.springframework.web.reactive.function.client.WebClient’ available: expected single matching bean but found 2: selfApiClient,externalApiClient

I also added this to my build.gradle after reading some posts about enabling the parameters flag of the java compiler:

compileJava {
  options.compilerArgs += [
      '-parameters'
  ]
}