Major Description
Because the local default locale isn't in available locales at Locale, when I did some tests locally with python code, StopWordsRemover related python test hits some errors, like:
Traceback (most recent call last): File "/spark-1/python/pyspark/ml/tests/test_feature.py", line 87, in test_stopwordsremover stopWordRemover = StopWordsRemover(inputCol="input", outputCol="output") File "/spark-1/python/pyspark/__init__.py", line 111, in wrapper return func(self, **kwargs) File "/spark-1/python/pyspark/ml/feature.py", line 2646, in __init__ self.uid) File "/spark-1/python/pyspark/ml/wrapper.py", line 67, in _new_java_obj return java_obj(*java_args) File /spark-1/python/lib/py4j-0.10.8.1-src.zip/py4j/java_gateway.py", line 1554, in __call__ answer, self._gateway_client, None, self._fqn) File "/spark-1/python/pyspark/sql/utils.py", line 93, in deco raise converted pyspark.sql.utils.IllegalArgumentException: 'StopWordsRemover_4598673ee802 parameter locale given invalid value en_TW.'
As per hyukjin.kwon's advice, instead of setting up locale to pass test, it is better to have a workable locale if system default locale can't be found in available locales in JVM. Otherwise, users have to manually change system locale or accessing a private property _jvm in PySpark.
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