ryphnyuan commented on issue #722: ServiceComb的调用链默认是对接zipkin的，如何对接jaeger？ URL: https://github.com/apache/incubator-servicecomb-java-chassis/issues/722#issuecomment-402625198 当前是通过在tracingfilter之后添加一个filter，把当前的span放到HttpRequest的attribute里面，经过RestServlet后，再做一个实现了HttpServerFilter的接口，把请求里面的span重新激活，目前看形成了一条调用链。 不过相比未开启servicecomb的时候，还是缺少由io.opentracing.contrib.spring.web.interceptor.TracingHandlerInterceptor这个类添加上去的一些信息。因为这些在原来的DispatcherServlet调用的一些Handler在RestServlet中并不会调用 
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