Github user wangyum commented on the issue:
https://github.com/apache/spark/pull/22179
Sorry @dongjoon-hyun I only reproduce one test.
kryo-parametrized-type-inheritance related to language. It seems scala
can't reproduce it:
```scala
val ser = new KryoSerializer(new
SparkConf).newInstance().asInstanceOf[KryoSerializerInstance]
class BaseType[R] {}
class CollectionType(val child: BaseType[_]*) extends BaseType[Boolean]
{
val children: List[BaseType[_]] = child.toList
}
class ValueType[R](val v: R) extends BaseType[R] {}
val value = new CollectionType(new ValueType("hello"))
ser.serialize(value)
```
SPARK-23131 may be related to data. I can't reproduce it:
```scala
def modelToString(model: GeneralizedLinearRegressionModel): (String,
String) = {
val os: ByteArrayOutputStream = new ByteArrayOutputStream()
val zos = new GZIPOutputStream(os)
val oo: ObjectOutputStream = new ObjectOutputStream(zos)
oo.writeObject(model)
oo.close()
zos.close()
os.close()
(model.uid, DatatypeConverter.printBase64Binary(os.toByteArray))
}
```
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