Github user liyezhang556520 commented on the pull request:
https://github.com/apache/spark/pull/5886#issuecomment-99322278
Hi @vanzin , you are correct that a single call to `listStatus` will return
all information of the all available log files, but I'm not sure about the
details of `listStatus` in HDFS, it seems when there are too many items in the
directory, HDFS will fetch them in batch, and between the batches, there is a
time gap. in which some of the write operations can be inserted. So my concern
is whether the `getModificationTime` provided by HDFS `FileStatus` can be fully
trusted? May be there are some scenarios that HDFS can guarantee.
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