Github user gliptak commented on a diff in the pull request:
https://github.com/apache/spark/pull/9263#discussion_r43125731
--- Diff: python/pyspark/mllib/tests.py ---
@@ -76,7 +76,8 @@
pass
ser = PickleSerializer()
-sc = SparkContext('local[4]', "MLlib tests")
+conf = SparkConf().set("spark.driver.allowMultipleContexts", "true")
--- End diff --
@mengxr This was my (failing) attempt to correct the test errors (caused by
```--parallelism=4```?). Maybe @JoshRosen could comment?
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