Sometimes waitress is timing out with a Socket error

[mpacer]

Last bits of error output:

ERROR:waitress:Socket error
Traceback (most recent call last):
File "/Users/mpacer/anaconda3/envs/py36/lib/python3.6/site-packages/waitress/channel.py", line 166, in handle_read
data = self.recv(self.adj.recv_bytes)
File "/Users/mpacer/anaconda3/envs/py36/lib/python3.6/asyncore.py", line 374, in recv
data = self.socket.recv(buffer_size)
TimeoutError: [Errno 60] Operation timed out

[stefanv]

It may be worth checking whether the webserver ever blocks on a manually triggered build. I don't think it should, but if it does I'd expect to see this kind of thing.