DeprecationWarning: Listening to events on the Db class has been deprecated and will be removed in the next major version

I got some deprecation warning

OS : macOS 11.2 Big Sur
Monk : Latest 7.3.3
Mongodb : Latest 3.6.4

(node:58674) DeprecationWarning: Listening to events on the Db class has been deprecated and will be removed in the next major version.
    at /Users/forte/Workspace/freejs/node_modules/monk/lib/manager.js:150:18
    at Array.forEach (<anonymous>)
    at Manager.<anonymous> (/Users/forte/Workspace/freejs/node_modules/monk/lib/manager.js:149:95)
    at /Users/forte/Workspace/freejs/node_modules/mongodb/lib/utils.js:693:5
    at /Users/forte/Workspace/freejs/node_modules/mongodb/lib/mongo_client.js:227:7
    at connectCallback (/Users/forte/Workspace/freejs/node_modules/mongodb/lib/operations/connect.js:366:5)
    at /Users/forte/Workspace/freejs/node_modules/mongodb/lib/operations/connect.js:602:5
    at Object.connectHandler [as callback] (/Users/forte/Workspace/freejs/node_modules/mongodb/lib/core/sdam/topology.js:297:43)
    at processWaitQueue (/Users/forte/Workspace/freejs/node_modules/mongodb/lib/core/sdam/topology.js:1048:21)
    at NativeTopology.serverUpdateHandler (/Users/forte/Workspace/freejs/node_modules/mongodb/lib/core/sdam/topology.js:567:7)
    at Server.emit (events.js:315:20)
    at Server.EventEmitter.emit (domain.js:467:12)
    at Monitor.<anonymous> (/Users/forte/Workspace/freejs/node_modules/mongodb/lib/core/sdam/server.js:151:12)
    at Monitor.emit (events.js:327:22)
    at Monitor.EventEmitter.emit (domain.js:467:12)
    at /Users/forte/Workspace/freejs/node_modules/mongodb/lib/core/sdam/monitor.js:272:13

Prompted to come here for this same issue.

https://stackoverflow.com/questions/66190532/deprecationwarning-listening-to-events-on-the-db-class-has-been-deprecated-and

TEMP Fix.
you must remove current mongoose version (I was on 5.11.13), and downgrade to mongoose@5.11.15, to resolve it.

This is fixed with mongodb version 3.6.5.

npm i mongodb@3.6.5

This can also be fixed with npm i mongodb@3.6.3, as that version is before the bug occured.

Given that this isn't an issue with monk and is resolved downstream, this is probably safe to close?

I have tried to install mongodb@3.6.5 and 3.6.6 but the deprecation warning still be exist..
And originally why I open the issue, I think this deprecation may cause problem in the next release if monk library is not patched / fixed

And I have found monk library also have own mongodb version. So which mongodb version that we install to our project, monk will use its own mongodb version

And I have found monk library also have own mongodb version. So which mongodb version that we install to our project, monk will use its own mongodb version

This is not how NPM works.

Monk specifies "mongodb": "^3.2.3",, which means any version of mongodb greater than or equal to 3.2.3, but NOT 4.x.x.

This means that if you explicitly install a version of mongodb in your project, monk will use that version of mongodb, provided that the version you install is after 3.2.3.

@zkldi

@zkldi
Please check it out this simple repo https://github.com/fortezhuo/monk_dummy
The repo only contains mongodb 3.6.3 and monk 7.3.3

{
  "name": "monk_dummy",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "mongodb": "3.6.3",
    "monk": "^7.3.3"
  }
}

I used to use yarn and found monk still use mongodb@3.6.6. I think the problem may be caused by yarn.

Yarn Version : 1.22.10

Strange, this has started breaking for me again. Nothing has changed with the versions installed, either.

Well, hm. Here's an uninteresting fix. If you:

install monk npm install monk
install mongodb@3.6.3, @3.6.5, or later deliberately npm install mongodb
uninstall monk npm uninstall monk
install monk npm install monk

The errors do not appear. I have absolutely no idea how this fixes the problem, but uh, it does. Maybe NPM is doing some wacky cacheing.

I solved this problem with silly solution, I had cloned monk library, downgrade mongodb to 3.6.3, and allow lib to be hosted on github. So I use the cloned monk on my project

"monk": "fortezhuo/monk",

Well, hm. Here's an uninteresting fix. If you:

install monk npm install monk

install mongodb@3.6.3, @3.6.5, or later deliberately npm install mongodb

uninstall monk npm uninstall monk

install monk npm install monk

The errors do not appear. I have absolutely no idea how this fixes the problem, but uh, it does. Maybe NPM is doing some wacky cacheing.

Hi! I tried this but I'm still receiving the warning. I tried all other solutions above as well... Anyone who found a fix yet?

I have exactly the same problem. Is there already a solution?

Why isn't Monk just using the new paradigm?
https://www.mongodb.com/community/forums/t/node-44612-deprecationwarning-listening-to-events-on-the-db-class-has-been-deprecated-and-will-be-removed-in-the-next-major-version/15849/4

It's a shame that we have not received any reply from the developers of this framework, stating how to resolve this issue or at least letting us know they are working on it.

It's a pain in the ass when you're debugging your program and all you see is that you're being spammed by these errors.

Someone, please tell me how to disable these errors, I don't care if they're just ignored or if the code is fixed, I JUST DONT WANT TO SEE THEM. Thanks.

npm install monk

This worked for me. i almost collapsed fixing this bug

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DeprecationWarning: Listening to events on the Db class has been deprecated and will be removed in the next major version #333

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mcasto commented on Feb 18, 2021

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