System Design Patterns: From Fundamentals to Real Systems
Vote

0% completed

​

Bidirectional Streaming

1. The Incident

Your team releases a chat application over WebSockets, allowing both sides to send live messages. It works perfectly in the demo and in staging. Production behaves differently.

Production has three gateway servers behind a load balancer. A gateway server holds client connections. Alice connects to server A, while Bob joins the same room through server B. Alice sends "hey," and server A checks its local connection list. It finds only Alice, so Bob receives nothing.

.....

.....

.....

Like the course? Get enrolled and start learning!

Reading Progress

0%

Vote for new content