medium10 pts · first answer countssparkspark-rdd

Task not serializable error

A job fails with "Task not serializable". The map function uses self.db_client, a database client created on the driver. What is the cause?

A.The executors do not have the database driver installedB.The database rejected too many connections at onceC.Spark must serialize the closure, and the client cannot be serializedD.The map function returns a value of the wrong type

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Task not serializable error

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