Steve Loughran created HADOOP-14600:
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Summary: LocatedFileStatus constructor forces RawLocalFS to exec a
process to get the permissions
Key: HADOOP-14600
URL: https://issues.apache.org/jira/browse/HADOOP-14600
Project: Hadoop Common
Issue Type: Bug
Components: fs
Affects Versions: 2.7.3
Environment: file:// in a dir with many files
Reporter: Steve Loughran
Reported in SPARK-21137. a {{FileSystem.listStatus}} call really craws against
the local FS, because {{FileStatus.getPemissions}} call forces
{{DeprecatedRawLocalFileStatus}} tp spawn a process to read the real UGI values.
That is: for every other FS, what's a field lookup or even a no-op, on the
local FS it's a process exec/spawn, with all the costs. This gets expensive if
you have many files.
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