What is QVX_UNEXPECTED_END_OF_DATA? One of our Client is facing this problem, when they load data from Oracle.Please find the Snap Shots Attached
Please check first your database connectivity is perfect i.e, the issue you behind the reason.
i got same issue because once my database or data center connections failed and resolved this issue, after issue been resolved and not repeated.
Actually your connection getting timed out.
Just post one more connection at the top of the table at which you are getting error.
It worked for me.
Or else increase time period in your connection string if possible