One post tagged with "shutdown"

Every Go tutorial ends the same way: log.Fatal(app.Listen(":3000")). The server starts, the tutorial is done. Nobody talks about what happens when the server stops.

Here is what happens: a deploy rolls out, the process gets SIGTERM, and every request that was mid-flight - a database write, a file upload, a payment confirmation - gets killed instantly. The client sees a connection reset. The database row is half-written. The payment went through but the confirmation never reached the user.

Graceful shutdown is not a nice-to-have. It is the difference between "the deploy went fine" and "we lost three transactions during the rollout."