Github user uncleGen commented on a diff in the pull request:
https://github.com/apache/spark/pull/15992#discussion_r89461071
--- Diff:
streaming/src/main/scala/org/apache/spark/streaming/receiver/Receiver.scala ---
@@ -83,7 +84,12 @@ import org.apache.spark.storage.StorageLevel
* }}}
*/
@DeveloperApi
-abstract class Receiver[T](val storageLevel: StorageLevel) extends
Serializable {
+abstract class Receiver[T](val storageLevel: StorageLevel)(implicit t:
ClassTag[T])
--- End diff --
As far as I know, this change will indeed broke **custom receiver**
implementation in **Java**, just like the update in
**JavaCustomReceiver.java**. Besides, in my humble opinion, I did not encounter
any problem in my local test.
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