关于SpringBoot 3.x Context Propagation的不同Spring Boot 3.x 将sleuth大部分实现迁移到Micrometer-Tracing中，链路追踪发生了一些小变化 在Spring Boot 2.x中，默认是使用X-B3-TraceId, X-B3-ParentSpanId, X-B3-SpanId http头来传递链路id 服务A调用服务B，服务B直接使用

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