title: EMR Spark - TransportClient: Failed to send RPC
body: <p>I'm getting this error, I tried to increase memory on cluster instances and in the executor and driver parameters without success.</p>
  
  <pre><code>17/05/07 23:17:07 ERROR TransportClient: Failed to send RPC 6465703946954088562 to ip-172-30-12-164.eu-central-1.compute.internal/172.30.12.164:34706: java.nio.channels.ClosedChannelException
  </code></pre>
  
  <p>Does anyone have any clue to fix this error?</p>
  
  <p>BTW I'm using YARN as cluster manager</p>
  
  <p>Thanks in advance</p>