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From Gerard Maas <gerard.m...@gmail.com>
Subject Re: Convert RDD[Iterrable[MyCaseClass]] to RDD[MyCaseClass]
Date Mon, 03 Dec 2018 16:48:28 GMT
James,

How do you create an instance of `RDD[Iterable[MyCaseClass]]` ?
Is it in that first code snippet? > new SparkContext(sc).parallelize(seq)?

kr, Gerard




On Fri, Nov 30, 2018 at 3:02 PM James Starks <suserft@protonmail.com.invalid>
wrote:

> When processing data, I create an instance of RDD[Iterable[MyCaseClass]]
> and I want to convert it to RDD[MyCaseClass] so that it can be further
> converted to dataset or dataframe with toDS() function. But I encounter a
> problem that SparkContext can not be instantiated within SparkSession.map
> function because it already exists, even with allowMultipleContexts set to
> true.
>
>     val sc = new SparkConf()
>     sc.set("spark.driver.allowMultipleContexts", "true")
>     new SparkContext(sc).parallelize(seq)
>
> How can I fix this?
>
> Thanks.
>

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