title: Spark Streaming StreamingContext error
body: <p>Hi i am started spark streaming learning but i can't run an simple application
  My code is here </p>
  
  <pre><code>    import org.apache.spark._
      import org.apache.spark.streaming._
      import org.apache.spark.streaming.StreamingContext._
      val conf = new SparkConf().setMaster("spark://beyhan:7077").setAppName("NetworkWordCount")
      val ssc = new StreamingContext(conf, Seconds(1))
      val lines = ssc.socketTextStream("localhost", 9999)
      val words = lines.flatMap(_.split(" "))
  </code></pre>
  
  <p>And i am getting error like as the following</p>
  
  <pre><code>scala&gt; val newscc = new StreamingContext(conf, Seconds(1))
  15/10/21 13:41:18 WARN SparkContext: Another SparkContext is being constructed (or threw an exception in its constructor).  This may indicate an error, since only one SparkContext may be running in this JVM (see SPARK-2243). The other SparkContext was created at:
  </code></pre>
  
  <p>Thanks</p>