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StagesTab is a SparkUITab with stages URL prefix.

Stages Tab in Web UI

Creating Instance

StagesTab takes the following to be created:

StagesTab is created when:


When created, StagesTab attaches the following pages:


Stages tab shows the current state of all stages of all jobs in a Spark application with two optional pages for the tasks and statistics for a stage (when a stage is selected) and pool details (when the application works in FAIR scheduling mode).

The title of the tab is Stages for All Jobs.

With no jobs submitted yet (and hence no stages to display), the page shows nothing but the title.

Stages Page Empty

The Stages page shows the stages in a Spark application per state in their respective sections:

  • Active Stages
  • Pending Stages
  • Completed Stages
  • Failed Stages

Stages Page With One Stage Completed

The state sections are only displayed when there are stages in a given state.

In FAIR scheduling mode you have access to the table showing the scheduler pools.

Fair Scheduler Pools Table