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Diffstat (limited to 'python/pyspark/rdd.py')
| -rw-r--r-- | python/pyspark/rdd.py | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py index 879655dc53..08d0474026 100644 --- a/python/pyspark/rdd.py +++ b/python/pyspark/rdd.py @@ -521,6 +521,8 @@ class RDD(object): # the key-space into bins such that the bins have roughly the same # number of (key, value) pairs falling into them rddSize = self.count() + if not rddSize: + return self # empty RDD maxSampleSize = numPartitions * 20.0 # constant from Spark's RangePartitioner fraction = min(maxSampleSize / max(rddSize, 1), 1.0) samples = self.sample(False, fraction, 1).map(lambda (k, v): k).collect() |