Spring Cloud Config客户端加载配置失败：HttpMessageConverter适配异常

可访问配置服务器（CNF-S）地址http://localhost:8888，也能在http://localhost:8888/location-service/dev查看目标配置，但客户端（LOC-S）拉取location-service.yml配置时抛出「no suitable HttpMessageConverter found」异常，最终因未加载数据源配置导致应用启动失败。

配置服务器（CNF-S）配置 #

application.yml #

# Basic Configuration - Spring Config Server (CNF-S)
spring:
    application:
        name: Configuration
    profiles:
      active:
        - ${ENVIRONMENT} # 当前为"dev"
      default: dev

# GitHub Repository (private & SSH)
    cloud:
      config:
        server:
          git:
            uri: git@github.com:*****/EMP_CNF-S.git # 私有Git仓库
            ignore-local-ssh-settings: true
            default-label: ${ENVIRONMENT}
            private-key: ${GIT_SSH_KEY}
            search-paths: src/main/resources
            skip-ssl-validation: true
            timeout: 10
            clone-on-start: true

  # Spring Security
    security:
      user:
        name: ${EMP_CONFIG_USERNAME}
        password: ${EMP_CONFIG_PASSWORD}

# Server port
server:
  port: 8888

配置服务器上的location-service.yml #

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/location_db
    username: root
    password: test-123!

  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

  test:
    database:
      replace: none

客户端（LOC-S）配置 #

bootstrap.yml #

# Basic configs - Name & Profile
spring:
  application:
    name: location-service
  profiles:
    active:
      - ${ENVIRONMENT}

# Connecting to CNF-S - Configuration Server
  config:
    import: optional:configserver:${BASE_URL}:8888
  cloud:
    config:
      label: ${ENVIRONMENT}
      uri: ${BASE_URL}:8888
      name: location-service
      username: ${EMP_CONFIG_USERNAME}
      password: ${EMP_CONFIG_PASSWORD}

# Configuring Port for Location-Service
server:
  port: 8080

# Spring Actuator
management:
  endpoints:
    web:
      exposure:
        include:
          - health
          - info
      base-path: /actuator
  endpoint:
    health:
      show-details: always

错误日志 #

2024-09-23T15:38:53.706+02:00  INFO 43435 --- [location-service] [  restartedMain] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:8888
2024-09-23T15:38:53.712+02:00  WARN 43435 --- [location-service] [  restartedMain] c.c.c.ConfigServicePropertySourceLocator : Could not locate PropertySource: Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.cloud.config.environment.Environment] and content type [text/html;charset=UTF-8]
2024-09-23T15:38:53.714+02:00  INFO 43435 --- [location-service] [  restartedMain] com.emp.loc.LocationApplication          : The following 1 profile is active: "dev"
2024-09-23T15:38:53.719+02:00  INFO 43435 --- [location-service] [  restartedMain] o.s.c.c.c.ConfigServerConfigDataLoader   : Fetching config from server at : http://localhost:8888
2024-09-23T15:38:53.719+02:00  WARN 43435 --- [location-service] [  restartedMain] o.s.c.c.c.ConfigServerConfigDataLoader   : Could not locate PropertySource ([ConfigServerConfigDataResource@265110bb uris = array<String>['http://localhost:8888'], optional = true, profiles = 'default']): Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.cloud.config.environment.Environment] and content type [text/html;charset=UTF-8]
2024-09-23T15:38:53.719+02:00  INFO 43435 --- [location-service] [  restartedMain] o.s.c.c.c.ConfigServerConfigDataLoader   : Fetching config from server at : http://localhost:8888
2024-09-23T15:38:53.719+02:00  WARN 43435 --- [location-service] [  restartedMain] o.s.c.c.c.ConfigServerConfigDataLoader   : Could not locate PropertySource ([ConfigServerConfigDataResource@3373a584 uris = array<String>['http://localhost:8888'], optional = true, profiles = 'dev']): Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.cloud.config.environment.Environment] and content type [text/html;charset=UTF-8]
2024-09-23T15:38:53.719+02:00  INFO 43435 --- [location-service] [  restartedMain] o.s.c.c.c.ConfigServerConfigDataLoader   : Fetching config from server at : http://localhost:8888
2024-09-23T15:38:53.719+02:00  WARN 43435 --- [location-service] [  restartedMain] o.s.c.c.c.ConfigServerConfigDataLoader   : Could not locate PropertySource ([ConfigServerConfigDataResource@1d09bf99 uris = array<String>['http://localhost:8888'], optional = true, profiles = 'default']): Could not extract response: no suitable HttpMessageConverter found for response type [class org.springframework.cloud.config.environment.Environment] and content type [text/html;charset=UTF-8]
2024-09-23T15:38:54.010+02:00  INFO 43435 --- [location-service] [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2024-09-23T15:38:54.016+02:00  INFO 43435 --- [location-service] [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 2 ms. Found 0 JPA repository interfaces.
2024-09-23T15:38:54.077+02:00  INFO 43435 --- [location-service] [  restartedMain] o.s.cloud.context.scope.GenericScope     : BeanFactory id=845d36ed-6367-395b-a199-708537ceebfe
2024-09-23T15:38:54.392+02:00  INFO 43435 --- [location-service] [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port 8080 (http)
2024-09-23T15:38:54.400+02:00  INFO 43435 --- [location-service] [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2024-09-23T15:38:54.400+02:00  INFO 43435 --- [location-service] [  restartedMain] o.apache.catalina.core.StandardEngine    : Starting Servlet engine: [Apache Tomcat/10.1.28]
2024-09-23T15:38:54.417+02:00  INFO 43435 --- [location-service] [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2024-09-23T15:38:54.418+02:00  INFO 43435 --- [location-service] [  restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 698 ms
2024-09-23T15:38:54.494+02:00  WARN 43435 --- [location-service] [  restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Failed to initialize dependency 'dataSourceScriptDatabaseInitializer' of LoadTimeWeaverAware bean 'entityManagerFactory': Error creating bean with name 'dataSourceScriptDatabaseInitializer' defined in class path resource [org/springframework/boot/autoconfigure/sql/init/DataSourceInitializationConfiguration.class]: Unsatisfied dependency expressed through method 'dataSourceScriptDatabaseInitializer' parameter 0: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception with message: Failed to determine a suitable driver class
2024-09-23T15:38:54.495+02:00  INFO 43435 --- [location-service] [  restartedMain] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2024-09-23T15:38:54.511+02:00  INFO 43435 --- [location-service] [  restartedMain] .s.b.a.l.ConditionEvaluationReportLogger : 

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-09-23T15:38:54.518+02:00 ERROR 43435 --- [location-service] [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
    If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
    If you have database settings to be loaded from a particular profile you may need to activate it (the profiles dev are currently active).


Process finished with exit code 0

补充说明 #

${EMP_CONFIG_PASSWORD}是明文密码的BCrypt哈希值，配置服务器包含SecurityConfiguration.java类，代码如下：

@Configuration
@EnableWebSecurity
public class SecurityConfiguration {

    // 加载环境变量 - 用户名和密码
    @Value("${EMP_CONFIG_USERNAME}")
    private String envUsername;

    @Value("${EMP_CONFIG_PASSWORD}")
    private String envPassword;

    // 密码编码器
    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    // 安全过滤器链
    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception{

        // 检查用户名和密码是否可用
        boolean userInMemoryAuth = !envUsername.isEmpty() && !envPassword.isEmpty();

        // 根据环境配置安全规则
        http
                .csrf(csrf -> csrf.disable())
                .cors(cors -> cors.configurationSource(request -> {
                    var corsConfig = new CorsConfiguration();
                    corsConfig.addAllowedOrigin("http://localhost:8888");
                    corsConfig.addAllowedHeader("*");
                    corsConfig.addAllowedMethod("*");
                    corsConfig.setAllowCredentials(true);
                return corsConfig;
                }));

        if (userInMemoryAuth){
            http.authorizeHttpRequests(authorizeRequest ->
                    authorizeRequest.anyRequest().authenticated())
                    .formLogin(withDefaults());
        }else{
            http.authorizeHttpRequests(authorizeRequests ->
                    authorizeRequests.anyRequest().permitAll());
            // TODO: 添加网关服务和配置服务之间的JWT认证
        }
        return  http.build();
    }

    // 认证提供者 - 内存用户详情服务
    @Bean
    public InMemoryUserDetailsManager inMemoryUserDetailsManager(){
        if(!envUsername.isEmpty() && !envPassword.isEmpty()){
            UserDetails user = User
                    .withUsername(envUsername)
                    .password(envPassword)
                    .roles("ADMIN")
                    .build();
            return new InMemoryUserDetailsManager(user);
        }
        return new InMemoryUserDetailsManager();
    }
}

内容的提问来源于stack exchange，提问作者AbdoCherry