Could you disable `spark.kryo.registrationRequired`? Some classes may not
be registered but they work well with Kryo's default serializer.
On Fri, Jan 8, 2016 at 8:58 AM, Ted Yu <yuzhih...@gmail.com> wrote:
> bq. try adding scala.collection.mutable.WrappedArray
>
> But the hint said registering
> scala.collection.mutable.WrappedArray$ofRef.class
> , right ?
>
> On Fri, Jan 8, 2016 at 8:52 AM, jiml <j...@megalearningllc.com> wrote:
>
>> (point of post is to see if anyone has ideas about errors at end of post)
>>
>> In addition, the real way to test if it's working is to force
>> serialization:
>>
>> In Java:
>>
>> Create array of all your classes:
>> // for kyro serializer it wants to register all classes that need to be
>> serialized
>> Class[] kryoClassArray = new Class[]{DropResult.class,
>> DropEvaluation.class,
>> PrintHetSharing.class};
>>
>> in the builder for your SparkConf (or in conf/spark-defaults.sh)
>> .set("spark.serializer",
>> "org.apache.spark.serializer.KryoSerializer")
>> //require registration of all classes with Kyro
>> .set("spark.kryo.registrationRequired", "true")
>> // don't forget to register ALL classes or will get error
>> .registerKryoClasses(kryoClassArray);
>>
>> Then you will start to get neat errors like the one I am working on:
>>
>> Exception in thread "main" org.apache.spark.SparkException: Job aborted
>> due
>> to stage failure: Failed to serialize task 0, not attempting to retry it.
>> Exception during serialization: java.io.IOException:
>> java.lang.IllegalArgumentException: Class is not registered:
>> scala.collection.mutable.WrappedArray$ofRef
>> Note: To register this class use:
>> kryo.register(scala.collection.mutable.WrappedArray$ofRef.class);
>>
>> I did try adding scala.collection.mutable.WrappedArray to the Class array
>> up
>> top but no luck. Thanks
>>
>>
>>
>>
>>
>> --
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>
