参考：

https://stackoverflow.com/questions/48010634/why-does-spark-application-fail-with-ioexception-null-entry-in-command-strinhttps://stackoverflow.com/questions/40764807/null-entry-in-command-string-exception-in-saveastextfile-on-pyspark

缺少一个二进制解析文件

有空再补充