Bun --hot reload port clash, port already in use

[nikhil-swamix]

What version of Bun is running?

0.7.4+9cf868fef4ed5ed7ebcd2e6e561a1e83b35aaa43

What platform is your computer?

Linux 6.1.34-58.102.amzn2023.aarch64 aarch64 aarch64

What steps can reproduce the bug?

this is server code:

import cors from "cors";
import dotenv from "dotenv";
import express, { json, urlencoded } from "express";
import { connect } from "mongoose";
import auth from "./middlewares/auth.js";
import { router } from "./routes/index.js";

// INIT APP
const app = express();
dotenv.config();
app.use(cors());
app.use(json());
app.use(urlencoded({ extended: true }));

app.get("/", (req, res) => {
    res.send("Hello World- main branch - 04");
});

app.get("/env", (req, res) => {
    res.json(process.env);
});
app.use(auth);
app.use("/api", router);
// add route to log env variables

// app listen after mongoose connect
connect(Bun.env.MONGO_URI, { useNewUrlParser: true, useUnifiedTopology: true }).then(() => {
    console.log("Database.Connect: Success");
    app.listen(3000);
});

export default app;

What is the expected behavior?

should hot reload like vite, webpack (frontend) but expecting for backend i have read the docs, --watch is working but --hot or watch+hot is breaking was expecting if i change small string like "apple" to "ball" and that route is available at "/" then refresh browser should show ball. and server reload must not trigger.

What do you see instead?

330 | family: isIPv6(address) ? "IPv6" : "IPv4", 331 | port: this.#server.port 332 | }; 333 | } 334 | 335 | listen(port, host, backlog, onListen) { ^ error: Failed to start server. Is port 3000 in use? at listen (node:http:335:16) at listen (/home/ec2-user/superrtruck.com/node_modules/.pnpm/express@4.18.2/node_modules/express/lib/application.js:635:9) at /home/ec2-user/superrtruck.com/app.js:32:1

Additional information

No response

[henpa]

I can also reproduce this error with the example from https://bun.sh/guides/http/hot

After running "bun --hot run index.ts" the app loads fine, but crashes with "error: Failed to start server. Is port 3000 in use?" as soon as I edit and save the index.ts file

I've just installed bun 0.8.1 and I'm running this on Debian 10.13

Edit: I found this bug has been introduced in 0.8.0 because it doesn't crash with 0.7.3 Edit 2: Tried "bun upgrade --canary" and it upgraded to 0.8.2 and it doesn't crash anymore, so I guess this is being fixed :-)

[Electroid]

This was fixed.