DAGSchedulerSource — Metrics Source for DAGScheduler

DAGSchedulerSource is…​FIXME

DAGScheduler uses Spark Metrics System to report metrics about internal status.

The name of the source is DAGScheduler.

It emits the following numbers:

  • stage.failedStages - the number of failed stages

  • stage.runningStages - the number of running stages

  • stage.waitingStages - the number of waiting stages

  • job.allJobs - the number of all jobs

  • job.activeJobs - the number of active jobs

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