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Posted to issues@spark.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2017/09/20 11:08:00 UTC
[jira] [Resolved] (SPARK-17159) Improve
FileInputDStream.findNewFiles list performance
[ https://issues.apache.org/jira/browse/SPARK-17159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran resolved SPARK-17159.
------------------------------------
Resolution: Won't Fix
Based on the feedback of https://github.com/apache/spark/pull/14731 ; I'm doing all my spark+cloud support elsewhere.
closing as a WONTFIX;
> 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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