slice.db.py error: ValueError: RDD is empty

[zhangxushuaib]

Traceback (most recent call last):
File "./slice_db.py", line 119, in
main()
File "./slice_db.py", line 108, in main
slice_df = slice_db_action.run()
File "./slice_db.py", line 52, in run
.flatMap(_enumerate))
File "/home/zhangxu/usr/local/envs/reinvent-scaffold-decorator/lib/python3.6/site-packages/pyspark/sql/session.py", line 746, in createDataFrame
rdd, schema = self._createFromRDD(data.map(prepare), schema, samplingRatio)
File "/home/zhangxu/usr/local/envs/reinvent-scaffold-decorator/lib/python3.6/site-packages/pyspark/sql/session.py", line 390, in _createFromRDD
struct = self._inferSchema(rdd, samplingRatio, names=schema)
File "/home/zhangxu/usr/local/envs/reinvent-scaffold-decorator/lib/python3.6/site-packages/pyspark/sql/session.py", line 361, in _inferSchema
first = rdd.first()
File "/home/zhangxu/usr/local/envs/reinvent-scaffold-decorator/lib/python3.6/site-packages/pyspark/rdd.py", line 1381, in first
raise ValueError("RDD is empty")
ValueError: RDD is empty
when i use my data ,This problem always occurs.how to solve it? thankyou