Top-level use of w, wtimeout, j, and fsync is deprecated. Use writeConcern instead

Question

I am using mongodb with loopback and on successful connection I am getting below warning

Top-level use of w, wtimeout, j, and fsync is deprecated. Use writeConcern instead.

loopback version: 5.5.0

How to get rid of this? Kindly help

Immense

Answer 1

Apparently this warning was introduced in Mongo Driver v3.6.4 so the basis solution will be to down grade to v3.6.3. There is a PR that try to stop the warning outputs, and also a report on the Jira for the Node Driver. https://jira.mongodb.org/browse/NODE-3114

Update: The problem have been fixed with the version 3.6.5

Silvas

Thanks... So warning will be removed the next mongodb version. Right? – Immense

@Immense The problem should be fixed, i will keep this post updated about it. – Silvas

I see this same exact warning suddenly popping out of no where – Finegrain

Hey how to update to version 3.6.5? Still showing me the latest version is 3.6.4. – Farl

No matching version found for [email protected] – Chloras

I have to apologize to everyone, the fix will be available when they released 3.6.5 github.com/mongodb/node-mongodb-native/commit/… – Silvas

i updated to 3.6.5 but problem is still there – Detention

@BasitMinhas There is a probability that this warning comes from some module/package that still uses an old version of the MongoDB driver and not from your code. – Artemus

Answer 2

Pass the following options

mongoose.connect(process.env.MONGO_URI, { 
  useNewUrlParser: true,
  useFindAndModify: false,
  useUnifiedTopology: true,
  useCreateIndex: true 
})

Tanto

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