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https://issues.apache.org/jira/browse/SPARK-33016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-33016:
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Assignee: Apache Spark
> Potential SQLMetrics missed which might cause WEB UI display issue while AQE
> is on.
> -----------------------------------------------------------------------------------
>
> Key: SPARK-33016
> URL: https://issues.apache.org/jira/browse/SPARK-33016
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Leanken.Lin
> Assignee: Apache Spark
> Priority: Minor
>
> In current AQE execution, there might be a following scenario which might
> cause SQLMetrics being incorrectly override.
> # Stage A and B are created, and UI updated thru event
> onAdaptiveExecutionUpdate.
> # Stage A and B are running. Subquery in stage A keep updating metrics thru
> event onAdaptiveSQLMetricUpdate.
> # Stage B completes, while stage A's subquery is still running, updating
> metrics.
> # Completion of stage B triggers new stage creation and UI update thru event
> onAdaptiveExecutionUpdate again (just like step 1).
>
> But it's very hard to re-produce this issue, since it was only happened with
> high concurrency. For the fix, I suggested that we might be able to keep all
> duplicated metrics instead of updating it every time.
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