Spring Boot 3向Spring Boot 2调用时TraceId无法传递问题求助

将应用迁移至Spring Boot 3.2.6并引入Micrometer Tracing相关依赖后，调用基于Spring Boot 2.6.14（使用Sleuth）的API时，TraceId无法在两个应用间同步。

环境配置 #

Spring Boot 3.2.6 POM依赖 #

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-tracing-bridge-brave</artifactId>
</dependency>

<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-tracing</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

Spring Boot 3.2.6 YAML配置 #

management:
  tracing:
    propagation:
      type: b3
    sampling:
      probability: 1.0 

Spring Boot 2.6.14 POM依赖 #

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-sleuth</artifactId>
        <version>3.1.3</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.24</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

双方日志格式 #

logging.pattern.level=%5p [traceId=%X{traceId}, spanId=%X{spanId}] 

已尝试的无效配置 #

spring.sleuth.traceId128=true
spring.sleuth.supportsJoin=false
spring.sleuth.propagation.type=W3C,B3 

可行解决方案 #

• 调整Spring Boot 3的B3传播格式：Sleuth默认使用B3多header模式（X-B3-TraceId、X-B3-SpanId等），而Micrometer Tracing结合Brave默认可能使用单header模式。需在Spring Boot 3的YAML中添加：

  management:
    tracing:
      brave:
        propagation:
          type: B3_MULTI
  

• 统一Spring Boot 2的传播配置：移除W3C传播类型，仅保留B3，并强制启用128位TraceId（匹配Spring Boot 3默认行为），修改Spring Boot 2的配置：

  spring.sleuth.traceId128=true
  spring.sleuth.propagation.type=B3
  spring.sleuth.supportsJoin=false
  

• 验证请求头：确保Spring Boot 3发起的请求携带X-B3-TraceId（128位）、X-B3-SpanId、X-B3-Sampled这几个请求头，而非单条b3头。

• 检查依赖兼容性：确认Spring Boot 3的micrometer-tracing-bridge-brave版本与Spring Boot 3.2.6兼容（Spring Boot 3.2.x对应Micrometer Tracing 1.1.x，Brave 5.14.x，无需额外指定版本，由Spring Boot管理即可）。

内容的提问来源于stack exchange，提问作者Atul Rai