:: DeveloperApi :: Information about an org.apache.spark.Accumulable modified during a task or stage.
:: DeveloperApi :: Parses and holds information about inputFormat (and files) specified as a parameter.
:: DeveloperApi :: A result of a job in the DAGScheduler.
:: DeveloperApi :: Interface for listening to events from the Spark scheduler.
Periodic updates from executors.
:: DeveloperApi :: Stores information about a stage to pass from the scheduler to SparkListeners.
:: DeveloperApi :: Simple SparkListener that logs a few summary statistics when each stage completes
:: DeveloperApi :: Information about a running task attempt inside a TaskSet.
:: DeveloperApi :: A logger class to record runtime information for jobs in Spark.
"FAIR" and "FIFO" determines which policy is used to order tasks amongst a Schedulable's sub-queues "NONE" is used when the a Schedulable has no sub-queues.
Spark's scheduling components. This includes the org.apache.spark.scheduler.DAGScheduler and lower level org.apache.spark.scheduler.TaskScheduler.