Comment 8 for bug 1161599

After doing some research, it appears that when an "SSLError: The read operation timed out" occurs, the connection is closed. In the code that handles this, there is a retry loop, but the retry loop does not re-set up the connection, so I believe this is the source of the "Bad Request". It's not clear why there is a read time out in the first place, but perhaps a way to workaround this is to add code in the loop to re-set up the connection when this error is seen.