Github user kayousterhout commented on a diff in the pull request:
https://github.com/apache/spark/pull/4878#discussion_r25821421
--- Diff:
core/src/main/scala/org/apache/spark/deploy/master/FileSystemPersistenceEngine.scala
---
@@ -68,7 +68,7 @@ private[spark] class FileSystemPersistenceEngine(
private def deserializeFromFile[T](file: File)(implicit m: ClassTag[T]):
T = {
val fileData = new Array[Byte](file.length().asInstanceOf[Int])
- val dis = new DataInputStream(new FileInputStream(file))
+ val dis = new DataInputStream(new BufferedInputStream(new
FileInputStream(file)))
--- End diff --
Since we use readFully below, why do we need buffering?
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