fetch will always hang up about 4s #2348
Description
Bug Description
Upstream: nodejs/node#50188
Related: nodejs/node#43522, nodejs/node#48383
undici.fetch will still be hanging up even socket.end has been called, this will cause the node.js 18 server not to close at the right time.
node.js 19/20 won't have this issue because the server will always terminate all socket connections when calling server.close
Reproducible By
I did some small test code on node.js 20. Comparing undici.fetch with node-fetch
You will see that
const http = require("node:http")
const {promisify} = require("node:util")
const net = require("node:net");
async function test1() {
const server = http.createServer(async (req, res) => {
res.writeHead(200, {"Content-Type": "text/plain"});
res.write("Hello world");
res.end();
});
const listenPromisied = promisify(server.listen.bind(server));
const closePromisied = promisify(net.Server.prototype.close.bind(server));
await listenPromisied(0, "127.0.0.1");
const address = server.address();
const nodeFetch = (await import("node-fetch")).default
await nodeFetch(`http://${address.address}:${address.port}`);
console.time("server close");
await closePromisied();
console.timeEnd("server close");
}
async function test2() {
const server = http.createServer(async (req, res) => {
res.writeHead(200, {"Content-Type": "text/plain"});
res.write("Hello world");
res.end();
});
const listenPromisied = promisify(server.listen.bind(server));
const closePromisied = promisify(net.Server.prototype.close.bind(server));
await listenPromisied(0, "127.0.0.1");
const address = server.address();
const nodeFetch = (await import("undici")).fetch
await nodeFetch(`http://${address.address}:${address.port}`);
console.time("server close");
await closePromisied();
console.timeEnd("server close");
}
test1().then(() => test2());Expected Behavior
closePromisied should finish in within 100ms
Logs & Screenshots
> git:(main) ✗ node index.cjs
server close: 0.193ms
server close: 4.001sEnvironment
undici >= 4.4.1
Node.js 18.x, 19.x, 20.x