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-rw-r--r--streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverMessage.scala2
1 files changed, 1 insertions, 1 deletions
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverMessage.scala b/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverMessage.scala
index bf39d1e891..ab9fa19219 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverMessage.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverMessage.scala
@@ -18,6 +18,6 @@
package org.apache.spark.streaming.receiver
/** Messages sent to the NetworkReceiver. */
-private[streaming] sealed trait ReceiverMessage
+private[streaming] sealed trait ReceiverMessage extends Serializable
private[streaming] object StopReceiver extends ReceiverMessage