revert the write

core/src/main/scala/org/apache/spark/util/Utils.scala

@@ -2341,22 +2341,10 @@ private[spark] class RedirectThread(
  */
 private[spark] class CircularBuffer(sizeInBytes: Int = 10240) extends java.io.OutputStream {
   var pos: Int = 0
-  var buffer = new Array[Byte](sizeInBytes)
+  var buffer = new Array[Int](sizeInBytes)
 
-  /**
-   * Writes the specified byte to this output stream. The general
-   * contract for [[write]] is that one byte is written
-   * to the output stream. The byte to be written is the eight
-   * low-order bits of the argument `i`. The 24
-   * high-order bits of `i` are ignored.
-   *
-   * Subclasses of [[OutputStream]] must provide an
-   * implementation for this method.
-   *
-   * @param i the byte to be written.
-   */
-  override def write(i: Int): Unit = {
-    buffer(pos) = i.asInstanceOf[Byte]
+  def write(i: Int): Unit = {
+    buffer(pos) = i
     pos = (pos + 1) % buffer.length
   }