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https://issues.apache.org/jira/browse/SPARK-26327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16717149#comment-16717149
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ASF GitHub Bot commented on SPARK-26327:
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AmplabJenkins commented on issue #23287: [SPARK-26327][SQL][BACKPORT-2.4] Bug
fix for `FileSourceScanExec` metrics update
URL: https://github.com/apache/spark/pull/23287#issuecomment-446202858
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> Metrics in FileSourceScanExec not update correctly while
> relation.partitionSchema is set
> ----------------------------------------------------------------------------------------
>
> Key: SPARK-26327
> URL: https://issues.apache.org/jira/browse/SPARK-26327
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Yuanjian Li
> Assignee: Yuanjian Li
> Priority: Major
> Fix For: 3.0.0
>
>
> As currently approach in `FileSourceScanExec`, the metrics of "numFiles" and
> "metadataTime"(fileListingTime) were updated while lazy val
> `selectedPartitions` initialized in the scenario of relation.partitionSchema
> is set. But `selectedPartitions` will be initialized by `metadata` at first,
> which is called by `queryExecution.toString` in
> `SQLExecution.withNewExecutionId`. So while the
> `SQLMetrics.postDriverMetricUpdates` called, there's no corresponding
> liveExecutions in SQLAppStatusListener, the metrics update is not work.
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