org.apache.hadoop.mapred.YarnChild: Exception running child : java.io.IOException: Initialization of all the collectors failed. Error in last collector was :null
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java.lang.NullPointerException:
at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.init(MapTask.java:1012)
at org.apache.hadoop.mapred.MapTask.createSortingCollector(MapTask.java:402)