MapOutputTrackerMasterEndpoint output in Spark is slowing my jobs. What does it mean?
<p>I am getting this output in my spark jobs, and it is adding a lot of latency to my jobs. Just yesterday, I left the job running at this message overnight, and came home to see that nothing more has processed.</p>

<pre><code>16/01/08 18:51:36 INFO spark.MapOutputTrackerMaster: Size of output statuses for shuffle 0 is 930564 bytes
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.47:37232
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.44:55904
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.38:35491
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.43:60071
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.48:39267
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.39:44310
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.42:51390
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.32:36981
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.30:39261
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.34:58811
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.31:39829
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.40:45521
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.46:35892
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.33:35119
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.36:44486
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.37:35971
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.35:59625
16/01/08 18:51:36 INFO spark.MapOutputTrackerMasterEndpoint: Asked to send map output locations for shuffle 0 to 172.31.1.45:40861
</code></pre>

<p>I tried googling it, but documentation was sparse and I could not really understand. Does any one know?</p>