title: Spark:executor.CoarseGrainedExecutorBackend: Driver Disassociated disassociated
body: <p>I am learning how to use spark and I have a simple program.When I run the jar file it gives me the right result but I have some error in the stderr file.just like this:</p>
  
  <pre><code> 15/05/18 18:19:52 ERROR executor.CoarseGrainedExecutorBackend: Driver   Disassociated [akka.tcp://sparkExecutor@localhost:51976] -&gt; [akka.tcp://sparkDriver@172.31.34.148:60060] disassociated! Shutting down.
   15/05/18 18:19:52 WARN remote.ReliableDeliverySupervisor: Association with remote system [akka.tcp://sparkDriver@172.31.34.148:60060] has failed, address is now gated for [5000] ms. Reason is: [Disassociated].
  </code></pre>
  
  <p>You can get the whole stderr file in there:</p>
  
  <p><a href="http://172.31.34.148:8081/logPage/?appId=app-20150518181945-0026&amp;executorId=0&amp;logType=stderr" rel="nofollow noreferrer">http://172.31.34.148:8081/logPage/?appId=app-20150518181945-0026&amp;executorId=0&amp;logType=stderr</a></p>
  
  <p>I searched this problem and find this:</p>
  
  <p><a href="https://stackoverflow.com/questions/28967500/why-spark-application-fail-with-executor-coarsegrainedexecutorbackend-driver-d">Why spark application fail with &quot;executor.CoarseGrainedExecutorBackend: Driver Disassociated&quot;?</a></p>
  
  <p>And I turn up the spark.yarn.executor.memoryOverhead as it said but it doesn't work.</p>
  
  <p>I just have one master node(8G memory) and in the spark's slaves file there is only one slave node--the master itself.I submit like this:</p>
  
  <pre><code>./bin/spark-submit --class .... --master spark://master:7077 --executor-memory 6G --total-executor-cores 8 /path/..jar hdfs://myfile
  </code></pre>
  
  <p>I don't know what is the executor and what is the driver...lol...
  sorry about that..</p>
  
  <p>anybody help me?</p>