mongodb-memory-server: server.unref is not a function. (In 'server.unref()', 'server.unref' is undefined)

Versions

Bun: 1.0.3
mongodb-memory-server-*: ^9.0.0-beta.2
mongodb(the binary version): ^6.1.0
mongodb(the js package): 0.0.0
mongoose: 7.5.2
system: MacOS

package: mongo-memory-server

What is the Problem?

Looks like a problem with the port, but I didn’t specified one.

Code Example

My repo: https://github.com/DWboutin/kiosq-backend

It’s the only thing implemented

Debug Output

src/features/users/__tests__/UserRepository.spec.ts:
  MongoMS:ResolveConfig Debug Mode Enabled, through Environment Variable +0ms
  MongoMS:ResolveConfig findPackageJson: Found package.json at "/Users/mikaelboutin/Desktop/coding/bun-backend/package.json" +1ms
  MongoMS:MongoMemoryServer create: Called .create() method +0ms
  MongoMS:MongoMemoryServer Mongo[unknown]: start: Called .start() method +0ms
  MongoMS:MongoMemoryServer Mongo[unknown]: _startUpInstance: Called MongoMemoryServer._startUpInstance() method +0ms
  MongoMS:MongoMemoryServer Mongo[unknown]: getStartOptions: forceSamePort: false +1ms
  MongoMS:MongoMemoryServer Mongo[unknown]: _startUpInstance threw a Error:  [TypeError: server.unref is not a function. (In 'server.unref()', 'server.unref' is undefined)] +1ms
  MongoMS:MongoMemoryServer Mongo[unknown]: stop: Called .stop() method +0ms
  MongoMS:MongoMemoryServer Mongo[unknown]: stop: "instanceInfo" is not defined (never ran?) +0ms
80 | function tryPort(port) {
81 |     return new Promise((res, rej) => {
82 |         const server = http.createServer();
83 |         server.unref(); // dont keep this server from exiting the application
84 |         server.on('error', (err) => {
85 |             if (err?.code !== 'EADDRINUSE') {
                        ^
TypeError: server.unref is not a function. (In 'server.unref()', 'server.unref' is undefined)
at /Users/mikaelboutin/Desktop/coding/bun-backend/node_modules/mongodb-memory-server-core/lib/util/getport/index.js:85:21

Do you know why it happenes?

About this issue

Original URL
State: closed
Created 9 months ago
Comments: 16

Commits related to this issue

fix(getport): only run ".unref" if it exists fixes #801 — committed to nodkz/mongodb-memory-server by hasezoey 9 months ago

Most upvoted comments

🎉 This issue has been resolved in version 9.0.0-beta.3 🎉

The release is available on:

Your semantic-release bot 📦🚀

github-actions[bot] on Oct 5, 2023

i will re-open this issue to keep some tracker for the .unref check (and maybe extend until the childprocess issue is resolved)

hasezoey on Sep 29, 2023

i have made https://github.com/nodkz/mongodb-memory-server/issues/802, which tracks this “state” addition, but ultimately this does not really affect how the cleanup (and so the cleanup error) came to be and seems to be harmless aside from duplicate execution (at least for this case)

hasezoey on Sep 29, 2023

The only place I use MMS is in this file and I clean up only in the afterAll

await mongod.stop() mongod.cleanup()

firstly, .stop automatically calls .cleanup, with options { doCleanup: true, force: false } (ie clean temporary data, if not user specified), second is that .cleanup is a async function, so it would be awaited

you can fix this with either:

remove the .cleanup call, or
change to use .stop({ doCleanup: false })

as for why stop is seemingly called twice, i now know why after looking at the log again: .stop is always called if there is a instanceError event

i will likely need to add some kind of tracker to not accidentally call .stop twice

hasezoey on Sep 29, 2023

Looks like a problem with the port, but I didn’t specified one.

a port is always required, if you dont specify one, one will be generated

server.unref is not a function

this is a problem with bun, seems like it does not implement net:server:unref, see bun documentation:

🟡 Missing net.{get|set}DefaultAutoSelectFamily net.SocketAddress net.BlockList net.Server.ref() net.Server.unref() net.Socket.ref() net.Socket.unref().

source

Not a problem with MMS and bun is also not officially supported by MMS, please open a issue with bun instead (deno somewhat recently had added this)

hasezoey on Sep 28, 2023