Description
Do you want to request a feature or report a bug?
Report a bug
What is the current behavior?
We are currently running a MongoDB Atlas replica set. We are finding that when our cluster needs to re-elect a new primary, our application loses connection to MongoDB, regains connection, then throws an uncaught exception MongoServerSelectionError: The server is in quiesce mode and will shut down.
If the current behavior is a bug, please provide the steps to reproduce.
Here is the code we use for connecting:
mongoose
.connect(config.database, {
maxPoolSize: 100,
autoIndex: config.mongoose.autoCreateIndicesAndCollections,
autoCreate: config.mongoose.autoCreateIndicesAndCollections,
promiseLibrary: Bluebird
})
.catch(handleError);
mongoose.connection.on('connected', () => log.info('Mongodb connected'));
mongoose.connection.on('open', () => log.info('Mongodb connection opened'));
mongoose.connection.on('error', handleError);
mongoose.connection.on('disconnected', () =>
log.warn('Mongodb disconnected')
);
The error can be reproduced using the Test Failover option in Atlas or by scaling the cluster up or down. When doing this, here are the logs we see:
# initial connection
info: Mongodb connected {"timestamp":"2022-04-13T17:06:57.590Z"}
info: Mongodb connection opened {"timestamp":"2022-04-13T17:06:57.595Z"}
# disconnect event from primary re-election
warn: Mongodb disconnected {"timestamp":"2022-04-13T17:14:48.557Z"}
# reconnect events immediately after connection loss
info: Mongodb connected {"timestamp":"2022-04-13T17:14:48.738Z"}
info: Mongodb connection opened {"timestamp":"2022-04-13T17:14:48.739Z"}
# uncaught exception immediately after reconnect
error: MongoServerSelectionError: The server is in quiesce mode and will shut down {"type":"uncaughtException","timestamp":"2022-04-13T17:15:19.418Z"}
What is the expected behavior?
- Mongoose does not throw an uncaught exception, the error is reported through the
mongoose.connection.on('error', ...)listener. - Mongoose does not lose connection during a re-election (this could be an underlying Mongo issue so might not be relevant here).
What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.
Node.js: 16.8
Mongoose: 6.1.6
MongoDB: 5.0