title: why services are not shown in zipkin?
body: <ul>
  <li>I use Spring boot: <strong>1.5.16</strong></li>
  <li>Spring cloud: <strong>Edgware.RELEASE</strong></li>
  <li>Java: <strong>1.8</strong></li>
  </ul>
  
  <p>My Sampler looks like that:</p>
  
  <pre><code> @Bean
      public Sampler sampler(){
          return new AlwaysSampler();
   }
  </code></pre>
  
  <p>In Eureka everything seems well:
  <a href="https://i.stack.imgur.com/psmBn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/psmBn.png" alt="enter image description here"></a></p>
  
  <p>But my problem is that in Zipkin I can't see services at all.
  <a href="https://i.stack.imgur.com/mPAMr.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mPAMr.png" alt="enter image description here"></a></p>
  
  <p>I found only debug logs, I have no errors:</p>
  
  <pre><code>2018-09-18 05:15:53.831 DEBUG [reservation-client,,,] 3759 --- [io-9999-exec-10] o.s.c.sleuth.instrument.web.TraceFilter  : Received a request to uri [/reservations] that should not be sampled [false]
  2018-09-18 05:15:53.832 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.sleuth.instrument.web.TraceFilter  : No parent span present - creating a new span
  2018-09-18 05:15:53.832 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.web.TraceHandlerInterceptor    : Handling span [Trace: 950c6b586ebb2d56, Span: 950c6b586ebb2d56, Parent: null, exportable:true]
  2018-09-18 05:15:53.832 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.web.TraceHandlerInterceptor    : Adding a method tag with value [writeReservation] to a span [Trace: 950c6b586ebb2d56, Span: 950c6b586ebb2d56, Parent: null, exportable:true]
  2018-09-18 05:15:53.832 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.web.TraceHandlerInterceptor    : Adding a class tag with value [ReservationApiGatewayRestController] to a span [Trace: 950c6b586ebb2d56, Span: 950c6b586ebb2d56, Parent: null, exportable:true]
  2018-09-18 05:15:53.833  INFO [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] .e.r.ReservationApiGatewayRestController : VQ start sending!!!
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Processing message before sending it to the channel
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Parent span is [Trace: 950c6b586ebb2d56, Span: 950c6b586ebb2d56, Parent: null, exportable:true]
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Name of the span will be [message:output]
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,74b3c2b9366ff711,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Marking span with client send
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,74b3c2b9366ff711,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Completed sending and current span is [Trace: 950c6b586ebb2d56, Span: 74b3c2b9366ff711, Parent: 950c6b586ebb2d56, exportable:true]
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,74b3c2b9366ff711,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Marking span with client received
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,74b3c2b9366ff711,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Closing messaging span [Trace: 950c6b586ebb2d56, Span: 74b3c2b9366ff711, Parent: 950c6b586ebb2d56, exportable:true]
  2018-09-18 05:15:53.833 DEBUG [reservation-client,950c6b586ebb2d56,74b3c2b9366ff711,true] 3759 --- [io-9999-exec-10] o.s.c.s.zipkin2.DefaultEndpointLocator   : Span will contain serviceName [reservation-client]
  2018-09-18 05:15:53.834 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.i.m.TraceChannelInterceptor      : Messaging span [Trace: 950c6b586ebb2d56, Span: 74b3c2b9366ff711, Parent: 950c6b586ebb2d56, exportable:true] successfully closed
  2018-09-18 05:15:53.834 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.sleuth.instrument.web.TraceFilter  : Closing the span [Trace: 950c6b586ebb2d56, Span: 950c6b586ebb2d56, Parent: null, exportable:true] since the response was successful
  2018-09-18 05:15:53.834 DEBUG [reservation-client,950c6b586ebb2d56,950c6b586ebb2d56,true] 3759 --- [io-9999-exec-10] o.s.c.s.zipkin2.DefaultEndpointLocator   : Span will contain serviceName 
  </code></pre>
  
  <p>Question is simple. Why can't I see anything in Zipkin?
  This samples are written by <a href="https://github.com/joshlong/bootiful-microservices" rel="nofollow noreferrer">Josh Long.</a> </p>