Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/19661#discussion_r149016829
--- Diff:
core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala ---
@@ -178,10 +178,31 @@ class KryoSerializer(conf: SparkConf)
kryo.register(Utils.classForName("scala.collection.immutable.Map$EmptyMap$"))
kryo.register(classOf[ArrayBuffer[Any]])
+ // We can't load those class directly in order to avoid unnecessary
jar dependencies.
+ // We load them safely, ignore it if the class not found.
+
safeClassLoader("org.apache.spark.mllib.linalg.Vector").foreach(kryo.register(_))
--- End diff --
It is a little hacky, but not crazy. But rather than this, why not just
write here something like...
```
Seq("org.apache...", "...").foreach { className =>
try {
kryo.register(Utils.classForName(className))
} catch {
case _: ClassNotFoundException => // do nothing
}
}
```
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