org.apache.spark.scheduler
:: DeveloperApi :: Stores information about a stage to pass from the scheduler to SparkListeners.
Terminal values of accumulables updated during this stage.
Time when all tasks in the stage completed or when the stage was cancelled.
If the stage failed, the reason why.
When this stage was submitted from the DAGScheduler to a TaskScheduler.
:: DeveloperApi :: Stores information about a stage to pass from the scheduler to SparkListeners.