Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11150#discussion_r52505440
--- Diff: core/src/main/scala/org/apache/spark/SparkEnv.scala ---
@@ -277,8 +277,7 @@ object SparkEnv extends Logging {
"spark.serializer", "org.apache.spark.serializer.JavaSerializer")
logDebug(s"Using serializer: ${serializer.getClass}")
- val closureSerializer = instantiateClassFromConf[Serializer](
- "spark.closure.serializer",
"org.apache.spark.serializer.JavaSerializer")
+ val closureSerializer = new JavaSerializer(conf)
--- End diff --
I kept it just because I assume the usages of the closure serializer must
use the Java serializer, and can't use the generic `spark.serializer` since
that may be set to Kryo. Sure, there's probably not much point in passing it in
as an arg, I can change that.
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