Github user ehiggs commented on the pull request: https://github.com/apache/spark/pull/4204#issuecomment-71448742 Well, I could submit a patch to hadoop-common to do the sort in `o.a.h.fs.FileSystem`, and that would fix it basically everywhere. However, I had assumed that hadoop doesn't always care about ordering, hence this low footprint patch. >You could imagine this is an issue for something backed by, say, HBase. I haven't used HBase in anger or looked the code, so I can't really say if there is a bug there. FWIW, [according to the mailing list](http://apache-spark-developers-list.1001551.n3.nabble.com/RDD-order-guarantees-tp10142p10147.html), Spark relies on HDFS returning file parts in an order that appears to work. Perhaps HBase gets away with something similar and HBase on Lustre would have some difficulty. It's an interesting question.
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