title: Spark shell error : ERROR SparkDeploySchedulerBackend: Asked to remove non-existent executor 11
body: <p>Whenever I start the spark-shell on mapr Sandbox I keep on getting this error</p>
  
  <pre><code>ERROR SparkDeploySchedulerBackend: Asked to remove non-existent executor 11
  </code></pre>
  
  <p>Please help me to solve this error.</p>