apache/spark — pull request #3831 by JoshRosen (2014-12-29 20:26:25+00:00)
Title: [SPARK-4882] Register PythonBroadcast with Kryo so that PySpark works with KryoSerializer

This PR fixes an issue where PySpark broadcast variables caused NullPointerExceptions if KryoSerializer was used. The fix is to register PythonBroadcast with Kryo so that it's deserialized with a KryoJavaSerializer.