Adrian Ionescu created SPARK-20255:
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Summary: FileIndex hierarchy inconsistency
Key: SPARK-20255
URL: https://issues.apache.org/jira/browse/SPARK-20255
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.1.0
Reporter: Adrian Ionescu
Priority: Minor
Trying to get a grip on the {{FileIndex}} hierarchy, I was confused by the
following inconsistency:
On the one hand, {{PartitioningAwareFileIndex}} defines {{leafFiles}} and
{{leafDirToChildrenFiles}} as abstract, but on the other it fully implements
{{listLeafFiles}} which does all the listing of files. However, the latter is
only used by {{InMemoryFileIndex}}.
I'm hereby proposing to move this method (and all its dependencies) to the
implementation class that actually uses it, and thus unclutter the
{{PartitioningAwareFileIndex}} interface.
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