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https://issues.apache.org/jira/browse/SPARK-17159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15981143#comment-15981143
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Apache Spark commented on SPARK-17159:
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User 'steveloughran' has created a pull request for this issue:
https://github.com/apache/spark/pull/17745
> Improve FileInputDStream.findNewFiles list performance
> ------------------------------------------------------
>
> Key: SPARK-17159
> URL: https://issues.apache.org/jira/browse/SPARK-17159
> Project: Spark
> Issue Type: Improvement
> Components: DStreams
> Affects Versions: 2.0.0
> Environment: spark against object stores
> Reporter: Steve Loughran
> Priority: Minor
>
> {{FileInputDStream.findNewFiles()}} is doing a globStatus with a fitler that
> calls getFileStatus() on every file, takes the output and does listStatus()
> on the output.
> This going to suffer on object stores, as dir listing and getFileStatus calls
> are so expensive. It's clear this is a problem, as the method has code to
> detect timeouts in the window and warn of problems.
> It should be possible to make this faster
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