Github user WangTaoTheTonic commented on the pull request:
https://github.com/apache/spark/pull/5491#issuecomment-94621686
If we changed the way to iterate like you said, the delete operations may
cost too much time here (even be stuck) in case DFS client throw IOException
often (though with a very low possibility). So I'd keep it like now.
Treating ACE specially is good and I did it like in `checkForLogs`.
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