Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/18581#discussion_r126453938
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMOptions.scala ---
@@ -41,11 +41,15 @@ private[libsvm] class LibSVMOptions(@transient private
val parameters: CaseInsen
case o => throw new IllegalArgumentException(s"Invalid value `$o` for
parameter " +
s"`$VECTOR_TYPE`. Expected types are `sparse` and `dense`.")
}
+
+ val lineSeparator: Option[String] = parameters.get(LINE_SEPARATOR)
--- End diff --
Yea, actually in case of Univocity, it requires 2 characters:
```
CsvWriterSettings settings = new CsvWriterSettings();
settings.getFormat().setLineSeparator("aaa");
```
```
Exception in thread "main" java.lang.IllegalArgumentException: Invalid line
separator. Up to 2 characters are expected. Got 3 characters.
at com.univocity.parsers.common.Format.setLineSeparator(Format.java:121)
at com.univocity.parsers.common.Format.setLineSeparator(Format.java:109)
```
I don't see a reason to restrict this for now. At least, I can provide an
usecase with Windows -`\r\n`.
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