Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/6625#discussion_r31677779
--- Diff:
core/src/main/scala/org/apache/spark/serializer/SerializationDebugger.scala ---
@@ -220,6 +255,27 @@ private[spark] object SerializationDebugger extends
Logging {
override def writeByte(i: Int): Unit = {}
}
+ /** An output stream that emulates /dev/null */
+ private class NullOutputStream extends OutputStream {
+ override def write(b: Int) { }
+ }
+
+ /**
+ * A dummy [[ObjectOutputStream]] that saves the list of objects written
to it and returns
+ * them through `outputArray`.
--- End diff --
can you expand on this a little? e.g. why pass it null output stream, what
is it for, why we need to extend `ObjectOutputStream` etc.
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