Repository: spark Updated Branches: refs/heads/master 470007453 -> 599a8c6e2
[SPARK-11812][PYSPARK] invFunc=None works properly with python's reduceByKeyAndWindow invFunc is optional and can be None. Instead of invFunc (the parameter) invReduceFunc (a local function) was checked for trueness (that is, not None, in this context). A local function is never None, thus the case of invFunc=None (a common one when inverse reduction is not defined) was treated incorrectly, resulting in loss of data. In addition, the docstring used wrong parameter names, also fixed. Author: David Tolpin <david.tol...@gmail.com> Closes #9775 from dtolpin/master. Project: http://git-wip-us.apache.org/repos/asf/spark/repo Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/599a8c6e Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/599a8c6e Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/599a8c6e Branch: refs/heads/master Commit: 599a8c6e2bf7da70b20ef3046f5ce099dfd637f8 Parents: 4700074 Author: David Tolpin <david.tol...@gmail.com> Authored: Thu Nov 19 13:57:23 2015 -0800 Committer: Tathagata Das <tathagata.das1...@gmail.com> Committed: Thu Nov 19 13:57:23 2015 -0800 ---------------------------------------------------------------------- python/pyspark/streaming/dstream.py | 6 +++--- python/pyspark/streaming/tests.py | 11 +++++++++++ 2 files changed, 14 insertions(+), 3 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/spark/blob/599a8c6e/python/pyspark/streaming/dstream.py ---------------------------------------------------------------------- diff --git a/python/pyspark/streaming/dstream.py b/python/pyspark/streaming/dstream.py index 698336c..acec850 100644 --- a/python/pyspark/streaming/dstream.py +++ b/python/pyspark/streaming/dstream.py @@ -524,8 +524,8 @@ class DStream(object): `invFunc` can be None, then it will reduce all the RDDs in window, could be slower than having `invFunc`. - @param reduceFunc: associative reduce function - @param invReduceFunc: inverse function of `reduceFunc` + @param func: associative reduce function + @param invFunc: inverse function of `reduceFunc` @param windowDuration: width of the window; must be a multiple of this DStream's batching interval @param slideDuration: sliding interval of the window (i.e., the interval after which @@ -556,7 +556,7 @@ class DStream(object): if kv[1] is not None else kv[0]) jreduceFunc = TransformFunction(self._sc, reduceFunc, reduced._jrdd_deserializer) - if invReduceFunc: + if invFunc: jinvReduceFunc = TransformFunction(self._sc, invReduceFunc, reduced._jrdd_deserializer) else: jinvReduceFunc = None http://git-wip-us.apache.org/repos/asf/spark/blob/599a8c6e/python/pyspark/streaming/tests.py ---------------------------------------------------------------------- diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py index 0bcd1f1..3403f6d 100644 --- a/python/pyspark/streaming/tests.py +++ b/python/pyspark/streaming/tests.py @@ -582,6 +582,17 @@ class WindowFunctionTests(PySparkStreamingTestCase): self.assertRaises(ValueError, lambda: d1.reduceByKeyAndWindow(None, None, 0.1, 0.1)) self.assertRaises(ValueError, lambda: d1.reduceByKeyAndWindow(None, None, 1, 0.1)) + def test_reduce_by_key_and_window_with_none_invFunc(self): + input = [range(1), range(2), range(3), range(4), range(5), range(6)] + + def func(dstream): + return dstream.map(lambda x: (x, 1))\ + .reduceByKeyAndWindow(operator.add, None, 5, 1)\ + .filter(lambda kv: kv[1] > 0).count() + + expected = [[2], [4], [6], [6], [6], [6]] + self._test_func(input, func, expected) + class StreamingContextTests(PySparkStreamingTestCase): --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@spark.apache.org For additional commands, e-mail: commits-h...@spark.apache.org
