Allow objectStreamReset to be 0

Author: mateiz

core/src/main/scala/org/apache/spark/serializer/JavaSerializer.scala

@@ -35,12 +35,12 @@ private[spark] class JavaSerializationStream(out: OutputStream, counterReset: In
   /**
    * Calling reset to avoid memory leak:
    * http://stackoverflow.com/questions/1281549/memory-leak-traps-in-the-java-standard-api
-   * But only call it every 10,000th time to avoid bloated serialization streams (when
+   * But only call it every 100th time to avoid bloated serialization streams (when
    * the stream 'resets' object class descriptions have to be re-written)
    */
   def writeObject[T: ClassTag](t: T): SerializationStream = {
     objOut.writeObject(t)
-    if (counterReset > 0 && counter >= counterReset) {
+    if (counterReset >= 0 && counter >= counterReset) {
       objOut.reset()
       counter = 0
     } else {