srowen commented on a change in pull request #27525:
URL: https://github.com/apache/spark/pull/27525#discussion_r422679598
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File path: python/pyspark/streaming/dstream.py
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@@ -418,10 +418,12 @@ def slice(self, begin, end):
def _validate_window_param(self, window, slide):
duration = self._jdstream.dstream().slideDuration().milliseconds()
if int(window * 1000) % duration != 0:
- raise ValueError("windowDuration must be multiple of the slide
duration (%d ms)"
+ raise ValueError("windowDuration must be multiple of the parent " \
+ "dstream's slide (batch) duration (%d ms)"
Review comment:
dstream -> DStream
Please add [MINOR] to the title per
https://spark.apache.org/contributing.html
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