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Posted to issues@spark.apache.org by "Shixiong Zhu (JIRA)" <ji...@apache.org> on 2016/09/22 00:15:21 UTC

[jira] [Resolved] (SPARK-17569) Don't recheck existence of files when generating File Relation resolution in StructuredStreaming

     [ https://issues.apache.org/jira/browse/SPARK-17569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shixiong Zhu resolved SPARK-17569.
----------------------------------
       Resolution: Fixed
         Assignee: Burak Yavuz
    Fix Version/s: 2.1.0

> Don't recheck existence of files when generating File Relation resolution in StructuredStreaming
> ------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-17569
>                 URL: https://issues.apache.org/jira/browse/SPARK-17569
>             Project: Spark
>          Issue Type: Improvement
>            Reporter: Burak Yavuz
>            Assignee: Burak Yavuz
>             Fix For: 2.1.0
>
>
> Structured Streaming's FileSource lists files to classify files as Offsets. Once this file list is committed to a metadata log for a batch, this file list is turned into a "Batch FileSource" Relation which acts as the source to the incremental execution.
> While this "Batch FileSource" Relation is resolved, we re-check that every single file exists on the Driver. It takes a horrible amount of time, and is a total waste. We can simply skip file existence during execution.



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