spark技术分享FIFOSchedulableBuilder – SchedulableBuilder for FIFO Scheduling Mode
FIFOSchedulableBuilder is a SchedulableBuilder that holds a single Pool (that is given when FIFOSchedulableBuilder is created).
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Note
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FIFOSchedulableBuilder is the default SchedulableBuilder for TaskSchedulerImpl.
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Note
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When FIFOSchedulableBuilder is created, the TaskSchedulerImpl passes its own rootPool (a part of TaskScheduler Contract).
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FIFOSchedulableBuilder obeys the SchedulableBuilder Contract as follows:
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buildPools does nothing.
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addTaskSetManagerpasses the inputSchedulableto the one and only rootPool Pool (usingaddSchedulable) and completely disregards the properties of the Schedulable.
Creating FIFOSchedulableBuilder Instance
FIFOSchedulableBuilder takes the following when created:
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rootPoolPool
