I've become accustomed to being able to use system properties to override properties in the Hadoop Configuration objects. I just recently noticed that when Spark creates the Hadoop Configuraiton in the SparkContext, it cycles through any properties prefixed with spark.hadoop. and add those properties to the Hadoop Configuration (minus the spark.hadoop.). I don't see this advertised anywhere in the documentation. Is this a method that is supposed to be public to users? If so, should we add that to the documentation?
