Internal Spark class is not registered by Kryo

Hi developers: I have set spark.kryo.registrationRequired=true, but an exception occured: java.lang.IllegalArgumentException: Class is not registered: org.apache.spark.internal.io.FileCommitProtocol$TaskCommitMessage when I run the program. I tried to register it manually by kryo.register()

Internal Spark class is not registered by Kryo

Hi developers: I have set spark.kryo.registrationRequired=true, but an exception occured: java.lang.IllegalArgumentException: Class is not registered: org.apache.spark.internal.io.FileCommitProtocol$TaskCommitMessage when I run the program. I tried to register it manually by kryo.register() and