anchor.diff:  <3> Sample all requests. Set sampler-param to somewhere between 0 and 1, e.g. 0.50, if you do not wish to sample all requests.
   
   The second approach is to supply the properties as https://www.jaegertracing.io/docs/latest/client-features/[environment variables]. These can be specified as `jvm.args` as shown in the following section.
  -
  -NOTE: Currently the tracer can only be configured to report spans directly to the collector via HTTP, using the `quarkus.jaeger.endpoint` property (or `JAEGER_ENDPOINT` environment variable). Support for using the Jaeger agent, via UDP, will be available in a future version.
   
   == Run the application
   
  
positive.code: ```
  When the first request has been submitted, the Jaeger tracer within the app will be initialized:
  ```
  2019-01-14 17:36:38,580 localhost using-opentracing-dev.jar[14190] INFO  [i.j.Configuration] (XNIO-1 task-1) Initialized tracer=JaegerTracer(version=Java-0.33.1, serviceName=myservice, reporter=RemoteReporter(sender=HttpSender(), closeEnqueueTimeout=1000), sampler=ConstSampler(decision=true, tags={sampler.type=const, sampler.param=true}), tags={hostname=localhost.localdomain, jaeger.version=Java-0.33.1, ip=127.0.0.1}, zipkinSharedRpcSpan=false, expandExceptionLogs=false, useTraceId128Bit=false)
  ```
  
  Then visit the http://localhost:16686[Jaeger UI] to see the tracing information.
  
  
  Hit `CTRL+C` to stop the application.
  
  == Additional tracers
  
  The https://github.com/opentracing-contrib[OpenTracing API Contributions project] offers additional tracers that can be used to add tracing to a large variety of technologies/components.
  
  The tracers documented in the following section has been tested with Quarkus and works in both standard and native mode.
  
  === JDBC Tracer
  
  The https://github.com/opentracing-contrib/java-jdbc[JDBC tracer] will add a span for each JDBC queries done by your application, to enable it, add the following dependency to your pom.xml:
  
  [source, xml]
  ----
  
negative.code: 
  [source, text]
  ----
  ./mvnw compile quarkus:dev -Djvm.args="-DJAEGER_SERVICE_NAME=myservice -DJAEGER_SAMPLER_TYPE=const -DJAEGER_SAMPLER_PARAM=1"
  ----
  
  Once both the application and tracing system are started, you can make a request to the provided endpoint:
  