title: Manually stopping Spark Workers
body: <p>Is there a way to stop a Spark worker through the terminal? I'm aware of the scripts: start-all.sh, stop-all.sh, stop-workers.sh, etc. However, everytime I run start-all.sh there seems to be residual workers from a previous Spark cluster instance that are also spawned. I know this because the Worker Id contains the date and timestamp of when the worker was created. </p>
  
  <p>So when I run start-all.sh today, I see the same 7 or so workers that were created at the beginning of April.</p>
  
  <p>Is there a way to kill these earlier workers? Or perhaps a way to grep for their process names?</p>