title: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
body: <p>When run the spark example:</p>
  
  <p><a href="https://spark.apache.org/docs/1.6.2/sql-programming-guide.html#hive-tables" rel="nofollow noreferrer">spark-hive-tables</a> , I get errors on hadoop UI </p>
  
  <blockquote>
    <p>User class threw exception: java.lang.RuntimeException:
    java.lang.RuntimeException: Unable to instantiate
    org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient</p>
  </blockquote>
  
  <p>and warning </p>
  
  <blockquote>
    <p>executor.CoarseGrainedExecutorBackend: An unknown (x.x.x.x:x) driver
    disconnected.</p>
  </blockquote>
  
  <p>but I have start hive metastore on my spark-yarn cluster, what should I do?</p>