ERROR:py4j.clientserver:There was an exception while executing the Python Proxy on the Python Side.
Traceback (most recent call last):
File "/databricks/spark/python/lib/py4j-0.10.9.5-src.zip/py4j/clientserver.py", line 617, in _call_proxy
return_value = getattr(self.pool[obj_id], method)(*params)
File "/databricks/spark/python/pyspark/sql/utils.py", line 278, in call
raise e