This is a tiny sample application of Zipkin tracing in Java servlet.
At first, start Zipkin server as following:
wget -O zipkin.jar 'https://search.maven.org/remote_content?g=io.zipkin.java&a=zipkin-server&v=LATEST&c=exec'
java -jar zipkin.jar
Then start this sample application:
mvn jetty:run
Open http://localhost:8080/sample1 in your browser and check the tracing result of that call in Zipkin UI (http://localhost:9411/).