Github user clockfly commented on a diff in the pull request:
https://github.com/apache/spark/pull/15024#discussion_r78472224
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala
---
@@ -435,13 +435,13 @@ case class DataSource(
// 1. Only one output path can be specified on the write path;
// 2. Output path must be a legal HDFS style file system path;
// 3. It's OK that the output path doesn't exist yet;
- val caseInsensitiveOptions = new CaseInsensitiveMap(options)
- val outputPath = {
- val path = new Path(caseInsensitiveOptions.getOrElse("path", {
- throw new IllegalArgumentException("'path' is not specified")
- }))
+ val allPaths = paths ++ new CaseInsensitiveMap(options).get("path")
+ val outputPath = if (allPaths.length == 1) {
+ val path = new Path(allPaths.head)
val fs =
path.getFileSystem(sparkSession.sessionState.newHadoopConf())
path.makeQualified(fs.getUri, fs.getWorkingDirectory)
+ } else {
+ throw new IllegalArgumentException("Only one path can be
specified on the write path")
--- End diff --
Is IllegalArgumentException a proper message type? It is a RuntimeException
used when calling a method with reflection but passing different argument type.
```
/**
* Thrown to indicate that a method has been passed an illegal or
* inappropriate argument.
*
* @author unascribed
* @since JDK1.0
*/
```
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