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https://issues.apache.org/jira/browse/SPARK-17521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-17521:
------------------------------
    Assignee: Jianfei Wang

> Error when I use sparkContext.makeRDD(Seq())
> --------------------------------------------
>
>                 Key: SPARK-17521
>                 URL: https://issues.apache.org/jira/browse/SPARK-17521
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.0.0
>            Reporter: Jianfei Wang
>            Assignee: Jianfei Wang
>            Priority: Trivial
>              Labels: easyfix
>             Fix For: 2.0.1, 2.1.0
>
>
> when i use sc.makeRDD below
> ```
>     val data3 = sc.makeRDD(Seq())
>     println(data3.partitions.length)
> ```
> I got an error:
> Exception in thread "main" java.lang.IllegalArgumentException: Positive 
> number of slices required
> We can fix this bug just modify the last line ,do a check of seq.size
> ````
>   def makeRDD[T: ClassTag](seq: Seq[(T, Seq[String])]): RDD[T] = withScope {
>     assertNotStopped()
>     val indexToPrefs = seq.zipWithIndex.map(t => (t._2, t._1._2)).toMap
>     new ParallelCollectionRDD[T](this, seq.map(_._1), seq.size, indexToPrefs)
>   }
> ```



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