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From "Dongjoon Hyun (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-15512) repartition(0) should raise IllegalArgumentException.
Date Tue, 24 May 2016 21:48:12 GMT
Dongjoon Hyun created SPARK-15512:
-------------------------------------

             Summary: repartition(0) should raise IllegalArgumentException.
                 Key: SPARK-15512
                 URL: https://issues.apache.org/jira/browse/SPARK-15512
             Project: Spark
          Issue Type: Bug
            Reporter: Dongjoon Hyun


Previously, SPARK-8893 added the positive partition constrains on repartition/coalesce operations
in general.

This PR adds one missing part for that and adds explicit two testcases.

**Before**
{code:title=repartition(0)|borderStyle=solid}
scala> sc.parallelize(1 to 5).coalesce(0).collect()
java.lang.IllegalArgumentException: requirement failed: Number of partitions (0) must be positive.
...
scala> sc.parallelize(1 to 5).repartition(0).collect()
res1: Array[Int] = Array()
{code}

**After**
{code:title=repartition(0)|borderStyle=solid}
scala> sc.parallelize(1 to 5).coalesce(0).collect()
java.lang.IllegalArgumentException: requirement failed: Number of partitions (0) must be positive.
...
scala> sc.parallelize(1 to 5).repartition(0).collect()
java.lang.IllegalArgumentException: requirement failed: Number of partitions (0) must be positive.
...
{code}



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