Github user steveloughran commented on the issue:
https://github.com/apache/spark/pull/14731
LGTM. I was trying to see if there was a way to create a good test here by
triggering the takes-too-long codepath and having a counter, but there's no
obvious way to do that deterministically. I am doing a test for this against s3
in the spark-cloud module I'm writing; I can look at the printed counts of
getFileStatus before/after the patch to see the difference, but the actual
(testable) metrics are only accessible with forthcoming Hadoop 2.8 release.
TL;DR: no easy test, so there's nothing left to do
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