Dongjoon Hyun created SPARK-15512:
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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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