I Ross,
Thanks for your quick response.
Actually, if we had known the root cause for it, we would have tried to solve it or find a solution for it.
The problem is that we don’t have a thread for the root cause and the flow mentioned in the last reply is the information that we wrote.
So since we have made any changes and the process fail twice and the only info that we realize it might be related to the failures, is of new driver upgrade.
if you can point us to find the root cause or might encounter the same situation with other mongo users it can be very helpful.
Thanks,