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Posted to issues@spark.apache.org by "Burak Yavuz (JIRA)" <ji...@apache.org> on 2016/09/16 22:45:20 UTC

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

Burak Yavuz created SPARK-17569:
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             Summary: 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


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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