FIFOSchedulableBuilder

== FIFOSchedulableBuilder - SchedulableBuilder for FIFO Scheduling Mode

FIFOSchedulableBuilder is a <> that holds a single spark-scheduler-Pool.md[Pool] (that is given when <FIFOSchedulableBuilder is created>>).

NOTE: FIFOSchedulableBuilder is the scheduler:TaskSchedulerImpl.md#creating-instance[default SchedulableBuilder for TaskSchedulerImpl].

NOTE: When FIFOSchedulableBuilder is created, the TaskSchedulerImpl passes its own rootPool (a part of scheduler:TaskScheduler.md#contract[TaskScheduler Contract]).

FIFOSchedulableBuilder obeys the <> as follows:

• <> does nothing.
• addTaskSetManager spark-scheduler-Pool.md#addSchedulable[passes the input Schedulable to the one and only rootPool Pool (using addSchedulable)] and completely disregards the properties of the Schedulable.

=== [[creating-instance]] Creating FIFOSchedulableBuilder Instance

FIFOSchedulableBuilder takes the following when created:

• [[rootPool]] rootPool spark-scheduler-Pool.md[Pool]