Shotgun api upload version , show urllib2 Errno 10060]

I’m from China.

The speed of accessing Amazon in China is relatively slow. The fastest IP delay is also 50ms. I often find that errors occur when uploading the version or publish thumbnails. Sometimes SSL 590 is prompted, and sometimes 10060 is prompted. To illustrate the problem, I made a test, as shown in the figure. There are three consecutive uploads, and errors occur when 12 times are not equal. What is the reason? This problem never occurred when I used other network lines to delay 15ms