我在不是很大的 DataFrame 上使用 toPandas() ，但出现以下异常：
18/10/31 19:13:19 ERROR Executor: Exception in task 127.2 in stage 13.0 (TID 2264)
org.apache.spark.api.python.PythonException: Traceback (most recent call last):
File "/home/hadoop/spark2.3.1/python/lib/pyspark.zip/pyspark/worker.py", line 230, in main
process()
File "/home/hadoop/spark2.3.1/python/lib/pyspark.zip/pyspark/worker.py", line 225, in process
serializer.dump_stream(func(split_index, iterator), outfile)
File "/home/hadoop/spark2.3.1/python/lib/pyspark.zip/pyspark/serializers.py", line 261, in dump_stream
batch = _create_batch(series, self._timezone)
File "/home/hadoop/spark2.3.1/python/lib/pyspark.zip/pyspark/serializers.py", line 239, in _create_batch
arrs = [create_array(s, t) for s, t in series]
File "/home/hadoop/spark2.3.1/python/lib/pyspark.zip/pyspark/serializers.py", line 239, in <listcomp>
arrs = [create_array(s, t) for s, t in series] …