Hi Oleg,
did you lock something in your threads? Exceptions are gone, but the downloadspeed decreases extremely. 1 Download = 20Mbit/s and 2 Downloads parallel = 2Mbit/s per Download. Before the fix, 2 Downloads went with 10 Mbit/s per Download. It is not network related, testing in Lan at the moment. Do you have an Idea what happened?
Thanks again :-)