Github user HyukjinKwon commented on the pull request: https://github.com/apache/spark/pull/13007#issuecomment-218097561 @WeichenXu123 Currently it is possible to support multiple lines because the lines read from `LineRecordReader` becomes `Reader` (a byte stream) by `StringIteratorReader` which converts `Iterator` to `Reader` with manually inserted `\n`. But supporting multiple lines has potential problems I said above and this is one of the reasons why I opened a PR here, https://github.com/apache/spark/pull/12268.
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