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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/12/23 06:03:00 UTC
[jira] [Assigned] (SPARK-41683) Spark UI: In jobs API, numActiveStages can be negative in some cases
[ https://issues.apache.org/jira/browse/SPARK-41683?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-41683:
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Assignee: Apache Spark
> Spark UI: In jobs API, numActiveStages can be negative in some cases
> --------------------------------------------------------------------
>
> Key: SPARK-41683
> URL: https://issues.apache.org/jira/browse/SPARK-41683
> Project: Spark
> Issue Type: Bug
> Components: Spark Core, Web UI
> Affects Versions: 3.3.1
> Reporter: wy
> Assignee: Apache Spark
> Priority: Minor
> Attachments: image-2022-12-22-16-06-21-180.png, image-2022-12-22-16-06-45-367.png, image-2022-12-23-13-24-30-412.png
>
>
> In API /api/v1/applications/.../jobs, for each job, there's one property called numActiveStages, telling how many active stages of the job.
> It is calculated by the following logic:
> * When stage is submitted, numActiveStages += 1.
> * When stage is completed, numActiveStages -= 1.
> * When job is ended, for each pending stage, numActiveStages -= 1.
> !image-2022-12-22-16-06-45-367.png!
> !image-2022-12-23-13-24-30-412.png!
> !image-2022-12-22-16-06-21-180.png!
>
> However, there's possibility that there's no stage submitted event for some skipped stages. In this case, when job ends, numActiveStages may be minus. Example:
> # job 0 started with stage 0, 1, 2
> ** stage 0: pending
> ** stage 1: pending
> ** stage 2: pending
> ** numActiveStages: 0
> # stage 0 submitted
> ** stage 0: active
> ** stage 1: pending
> ** stage 2: pending
> ** numActiveStages: 1
> # stage 0 completed
> ** stage 0: completed
> ** stage 1: pending
> ** stage 2: pending
> ** numActiveStages: 0
> # job 0 ended
> ** stage 0: completed
> ** stage 1: skipped
> ** stage 2: skipped
> ** numActiveStages: -2
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