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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-17159) Improve FileInputDStream.findNewFiles list performance
Date Fri, 28 Sep 2018 14:17:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-17159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-17159:
------------------------------------

    Assignee: Apache Spark

> 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
>            Assignee: Apache Spark
>            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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