Running out of TCP ephemeral source ports

In this episode of the backend engineering show I describe an interesting bug I ran into where the web server ran out of ephemeral ports causing the system to halt. 

0:00 Intro

0:30 System architecture 

2:20 The behavior of the bug

4:00 Backend Troubleshooting

7:00 The cause

15:30 Ephemeral ports on loopback