Hi Alessandro,
I'd recommend you to check the UTs added in the commit which solved the
issue (ie.
https://github.com/apache/spark/commit/a66fe36cee9363b01ee70e469f1c968f633c5713).
You can use them to try and reproduce the issue.

Thanks,
Marco

2018-06-14 15:57 GMT+02:00 Alessandro Liparoti <[EMAIL PROTECTED]>: