title: Why does spark-submit and spark-shell fail with "Failed to find Spark assembly JAR. You need to build Spark before running this program."?
body: <p>I was trying to run spark-submit and I get
      "Failed to find Spark assembly JAR.
      You need to build Spark before running this program."
  When I try to run spark-shell I get the same error.
  What I have to do in this situation.</p>