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https://issues.apache.org/jira/browse/SPARK-47290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17828481#comment-17828481
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Parth Chandra commented on SPARK-47290:
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[~dongjoon] can we close this issue?
As discussed in the PR, updating a CustomTaskMetric is possible without adding
a new interface.
> Extend CustomTaskMetric to allow metric values from multiple sources
> --------------------------------------------------------------------
>
> Key: SPARK-47290
> URL: https://issues.apache.org/jira/browse/SPARK-47290
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.0.0
> Reporter: Parth Chandra
> Priority: Major
> Labels: pull-request-available
>
> Custom task metrics allow a DSV2 to add metrics that can be displayed in the
> UI. However, for DSV2 file sources, the FilePartitionReader may have multiple
> file readers, and each of these may report their metrics which need to be
> aggregated and bubbled up to the Scan. There is no way currently to update a
> metric value.
> A new interface that extends CustomTaskMetric and defines a way to allow
> updates would allow a DSV2 file scan implementation to over come this.
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