NT Freezing When Camera Is Unplugged

[RyanN]

Originally Posted by dubiousSwain

At competitions, when our camera is unplugged (and sometimes when its plugged in), we get an error on the driverstation that says something along the lines of "Camera not found at the specified ip address". We've noticed a direct correlation between this and a ~6-10 second slowdown of the dashboard refreshing, which we believe can be attributed to network tables. Has anyone else had this problem or can anyone help us fix it? It makes our dashboard basically useless which causes significant problems for our drivers. Thank you.

We experienced the same behavior when the SD card popped out of our Raspberry Pi and failed to boot. Network Table variables and the whole Dashboard GUI become extremely slow to respond.

I have not been able to determine the root cause of this behavior, as the camera read is in it's own loop, and when it's not connected, it does not peg out the CPU utilization or anything weird like I would expect.

I know Joe Ross experienced this issue as well, as I asked him about the issue when I believed it was the mjpg-streamer read that he provided that was causing the issue. I have determined that his team's code was not at fault, but I don't know what is.