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https://issues.apache.org/jira/browse/SPARK-26327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16714908#comment-16714908
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ASF GitHub Bot commented on SPARK-26327:
----------------------------------------
xuanyuanking opened a new pull request #23277: [SPARK-26327][SQL] Metrics in
FileSourceScanExec not update correctly
URL: https://github.com/apache/spark/pull/23277
## What changes were proposed in this pull request?
As the description in
[SPARK-26327](https://issues.apache.org/jira/browse/SPARK-26327),
`postDriverMetricUpdates` was called on wrong place cause this bug, fix this by
split the initializing of `selectedPartitions` and metrics updating logic. Add
the updating logic in `inputRDD` initializing which can take effect in both
code generation node and normal node.
## How was this patch tested?
New test case in `SQLMetricsSuite`.
Manual test:
| | Before | After |
|---------|:--------:|:-------:|
| CodeGen
|||
| Normal
|||
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> Metrics in FileSourceScanExec not update correctly
> --------------------------------------------------
>
> 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
> Priority: Major
>
> As currently approach in `FileSourceScanExec`, the metrics of "numFiles" and
> "metadataTime"(fileListingTime) were updated while lazy val
> `selectedPartitions` initialized. 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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