jlowe commented on a change in pull request #1920: MAPREDUCE-7241.
FileInputFormat listStatus with less memory footprint
URL: https://github.com/apache/hadoop/pull/1920#discussion_r399693011
##########
File path:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/FileInputFormat.java
##########
@@ -364,13 +364,29 @@ protected void addInputPathRecursively(List<FileStatus>
result,
if (stat.isDirectory()) {
addInputPathRecursively(result, fs, stat.getPath(), inputFilter);
} else {
- result.add(stat);
+ result.add(shrinkStatus(stat));
}
}
}
}
-
-
+
+ public static FileStatus shrinkStatus(FileStatus origStat) {
Review comment:
This is very much a user-facing class, and all public methods in this file
have Javadoc comments. I think it's appropriate here as well. There should be
a comment explaining what this is doing and why. When I first glanced at the
code, it looked like it was just making a copy of everything, and it didn't
look like it was shrinking anything at all.
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