Logging

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Temporary Alternative

Important

The driver doesn't use the logger in versions 4.0 and later. Attempting to use prior logger settings in this version won't print anything in the log.

Instead, see our monitoring guides:

Command Monitoring
Cluster Monitoring
Connection Pool Monitoring

Temporary Alternative

We are developing a new logging framework. In the meantime, you can output monitor events by using the following snippet:

const uri = "mongodb+srv://<user>:<password>@<cluster-url>?writeConcern=majority";
const client = new MongoClient(uri, { monitorCommands:true });
client.on('commandStarted', (event) => console.debug(event));
client.on('commandSucceeded', (event) => console.debug(event));
client.on('commandFailed', (event) => console.debug(event));

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Monitoring