title: Issue with Spark tutorial
body: <p>I'm trying out
  <a href="https://github.com/apache/spark/blob/v2.0.1/examples/src/main/scala/org/apache/spark/examples/sql/streaming/StructuredNetworkWordCountWindowed.scala" rel="nofollow noreferrer">https://github.com/apache/spark/blob/v2.0.1/examples/src/main/scala/org/apache/spark/examples/sql/streaming/StructuredNetworkWordCountWindowed.scala</a>
  example.</p>
  
  <p>But what should be the input at specified port number?</p>