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From Lijun Cao <>
Subject Internal Spark class is not registered by Kryo
Date Tue, 09 Oct 2018 11:22:03 GMT
Hi developers:

I have set spark.kryo.registrationRequired=true, but an exception occured: java.lang.IllegalArgumentException:
Class is not registered:$TaskCommitMessage
when I run the program. 

I tried to register it manually by kryo.register() and Sparkconf.registerKryoClasses, but
it still not work.

The related JIRA is SPARK-21569. And SPARK-10251, SPARK-6497 are may the same problem I think.

Be grateful if someone can help me..

Best Regards,
Lijun Cao
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