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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