LuciferYang commented on code in PR #40945:
URL: https://github.com/apache/spark/pull/40945#discussion_r1191838807
##########
core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala:
##########
@@ -26,6 +26,7 @@ import java.util.{Date, Locale}
import scala.collection.JavaConverters._
import scala.collection.mutable
import scala.collection.mutable.HashMap
+import scala.language.existentials
Review Comment:
for fix compile error of
```
[error]
/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala:575:36:
inferred existential type org.apache.hadoop.fs.FSDataOutputStreamBuilder[S,B](
forSome { type S <: org.apache.hadoop.fs.FSDataOutputStream; type B <:
org.apache.hadoop.fs.FSDataOutputStreamBuilder[S,B] }), which cannot be
expressed by wildcards, should be enabled
[error] by making the implicit value scala.language.existentials visible.
[error] ----
[error] This can be achieved by adding the import clause 'import
scala.language.existentials'
[error] or by setting the compiler option -language:existentials.
[error] See the Scaladoc for value scala.language.existentials for a
discussion
[error] why the feature should be explicitly enabled.
[error] val builder = fs.createFile(qualifiedPath)
[error] ^
[error] one error found
[error] (core / Compile / compileIncremental) Compilation failed
[error] Total time: 19 s, completed 2023-5-12 10:05:06
```
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