StringKe commented on issue #15091:
URL: https://github.com/apache/dubbo/issues/15091#issuecomment-2847585271
The same problem occurs when configuring Zipkin tracing, mainly in the
context switching of webflux.
org.apache.dubbo.spring.boot.autoconfigure.observability.DubboMicrometerTracingAutoConfiguration#dubboServerTracingObservationHandler
```
2025-05-02T15:58:59.842Z DEBUG 28890 --- [io-42010-exec-1] [
] o.s.w.s.a.HttpWebHandlerAdapter :
[7a06cd92] HTTP POST "/graphql"
2025-05-02T15:58:59.861Z TRACE 28890 --- [io-42010-exec-1]
[b3e0cb9fb1d6e22ac63ef6ce27a5e30a-1ca5e0e0cdfadcc1]
o.s.h.s.r.ServletHttpHandlerAdapter : [7a06cd92] onError:
java.lang.ClassCastException: class
org.springframework.http.server.reactive.observation.ServerRequestObservationContext
cannot be cast to class org.apache.dubbo.tracing.context.DubboServerContext
(org.springframework.http.server.reactive.observation.ServerRequestObservationContext
and org.apache.dubbo.tracing.context.DubboServerContext are in unnamed module
of loader 'app')
2025-05-02T15:58:59.861Z TRACE 28890 --- [io-42010-exec-1]
[b3e0cb9fb1d6e22ac63ef6ce27a5e30a-1ca5e0e0cdfadcc1]
o.s.h.s.r.ServletHttpHandlerAdapter : [7a06cd92] Setting ServletResponse
status to 500 Server Error
```
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