Github user sryza commented on a diff in the pull request:
https://github.com/apache/spark/pull/4258#discussion_r23855340
--- Diff:
core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala ---
@@ -97,7 +87,9 @@ class KryoSerializer(conf: SparkConf)
// Use the default classloader when calling the user registrator.
Thread.currentThread.setContextClassLoader(classLoader)
// Register classes given through spark.kryo.classesToRegister.
- classesToRegister.foreach { clazz => kryo.register(clazz) }
+ classesToRegister.split(',')
--- End diff --
Can we do the splitting and filtering during initialization so that we
don't incur them for each task?
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