Github user liancheng commented on the pull request:
https://github.com/apache/spark/pull/11936#issuecomment-201332718
Just realized the problem while washing dishes...
The above comment is a false alarm. The real problem is that I ignored
start position and length of the `PartitionedFile` and created ORC splits using
`OrcNewInputFormat`. After digging for a while, I found that although
instantiating `OrcNewSplit` is pretty complicated, `OrcNewInputSplit` doesn't
even require an `OrcNewSplit`, a plain `FileSplit` is just enough. So now the
`OrcRecordReader` is simply created using `OrcNewInputFormat` and a
`FileSplit`, which works well.
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