Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/17768
Current status: I don't know how using
```scala
val dirs = Array.empty[Int]
dirs.headOption.getOrElse {
throw new Exception("")
}
```
instead of
```scala
val dirs = Array.empty[Int]
dirs(0)
```
could make the tests failed (given the observations above).
In the last commit, I gave a shot it with if-else as below:
```scala
val dirs = Array.empty[Int]
if (dirs.nonEmpty) {
dirs(0)
} else {
throw new Exception("")
}
```
To make sure logically this should not make other tests flaky.
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