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Diffstat (limited to 'python/pyspark/rdd.py')
| -rw-r--r-- | python/pyspark/rdd.py | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py index 86cd89b245..140cbe05a4 100644 --- a/python/pyspark/rdd.py +++ b/python/pyspark/rdd.py @@ -1687,6 +1687,31 @@ class RDD(object): >>> x.zip(y).collect() [(0, 1000), (1, 1001), (2, 1002), (3, 1003), (4, 1004)] """ + if self.getNumPartitions() != other.getNumPartitions(): + raise ValueError("Can only zip with RDD which has the same number of partitions") + + def get_batch_size(ser): + if isinstance(ser, BatchedSerializer): + return ser.batchSize + return 0 + + def batch_as(rdd, batchSize): + ser = rdd._jrdd_deserializer + if isinstance(ser, BatchedSerializer): + ser = ser.serializer + return rdd._reserialize(BatchedSerializer(ser, batchSize)) + + my_batch = get_batch_size(self._jrdd_deserializer) + other_batch = get_batch_size(other._jrdd_deserializer) + if my_batch != other_batch: + # use the greatest batchSize to batch the other one. + if my_batch > other_batch: + other = batch_as(other, my_batch) + else: + self = batch_as(self, other_batch) + + # There will be an Exception in JVM if there are different number + # of items in each partitions. pairRDD = self._jrdd.zip(other._jrdd) deserializer = PairDeserializer(self._jrdd_deserializer, other._jrdd_deserializer) |