title: Exportable Zipkin/Brave/Spring-Cloud-Sleuth Span cannot be found in Zipkin
body: <p>I can't find a below <strong>exportable</strong> Span in Zipkin neither by it's traceId nor by spanId (some other spans appear, so Zipkin server seems to work)</p>
  <pre><code>{&quot;timestamp&quot;:&quot;2020-08-13 00:48:52.471&quot;,&quot;level&quot;:&quot;INFO&quot;,&quot;thread&quot;:&quot;xxx dispatcher: xxx&quot;,&quot;mdc&quot;:{&quot;traceId&quot;:&quot;481bef72295477ac&quot;,&quot;spanId&quot;:&quot;509cdbbac8833590&quot;,
  &quot;spanExportable&quot;:&quot;true&quot;,&quot;X-Span-Export&quot;:&quot;true&quot;,&quot;X-B3-SpanId&quot;:&quot;509cdbbac8833590&quot;,&quot;X-B3-ParentSpanId&quot;:&quot;37eca1021fd5241c&quot;,&quot;X-B3-TraceId&quot;:&quot;481bef72295477ac&quot;,
  &quot;parentId&quot;:&quot;37eca1021fd5241c&quot;},&quot;logger&quot;:&quot;xxxService&quot;,&quot;message&quot;:&quot;Sending response xxxMsg to RabbitMQ channel&quot;,&quot;context&quot;:&quot;default&quot;}
  
  </code></pre>
  <p>I also can't find it's parent &quot;parentId&quot;:&quot;37eca1021fd5241c&quot; in Zipkin.</p>
  <p>Where can be a problem? How can I bite/debug it?</p>
  <p>Possibly this span is in a flow, that was triggered by a rabbit message, not a rest request. Spans from a trace that were triggered by http rest request are correctly visible in Zipkin. But I can't find traces from flows triggered by rabbit message. What problem could be here?</p>