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https://issues.apache.org/jira/browse/SPARK-51492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-51492:
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Labels: pull-request-available (was: )
> FileStreamSource: Avoid expensive file concatenation if trace level is not
> enabled.
> ------------------------------------------------------------------------------------
>
> Key: SPARK-51492
> URL: https://issues.apache.org/jira/browse/SPARK-51492
> Project: Spark
> Issue Type: Task
> Components: Structured Streaming
> Affects Versions: 4.0.0
> Reporter: Siying Dong
> Priority: Major
> Labels: pull-request-available
>
> In this statement:
> [https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FileStreamSource.scala#L402]
> files.mkString("\n\t") can be really expensive if there are many files, even
> if they are not to be processed by this batch, and the trace level is not
> enabled. We should not call this expensive operation unless the log level is
> enabled.
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