Ashwatth Bhat

Hi @rsercano Thanks for your swift reply. Yes, I tried multiple times and the behaviour is same. We are running nosqlclient for around a year and there was no issues....

I was running the version 4.0.0, after this issue tried upgrading to 4.0.1 both versions has the same behaviour.

Please find the logs below ``` => Starting app on port 3000... {"level":"info","message":"[insert-default-settings]"} {"level":"info","message":"[migrate-connections]"} {"connection":{"url":"masked"},"level":"info","message":"[parse-url]"} {"parsedUrl":{"auth":{"user":"masked","password":"masked"},"server_options":{"socketOptions":{}},"db_options":{"read_preference_tags":null,"authSource":"masked","read_preference":"primary"},"rs_options":{"socketOptions":{},"rs_name":"rs0"},"mongos_options":{},"dbName":"admin","servers":[{"host":"masked","port":27017}],"isSrvRecord":false},"level":"info","message":"[parsed-url]"} {"connection":{"servers":[{"host":"masked","port":27017},{"host":"masked-host.mongodb-replicaset","port":27017},{"host":"masked-host.mongodb-replicaset","port":27017}],"connectionName":"product - ae","url":"","authenticationType":"scram_sha_1","databaseName":"admin","scram_sha_1":{"username":"","password":"","authSource":"masked-db"},"options":{"connectionTimeout":"","socketTimeout":"","readPreference":"primary","connectWithNoPrimary":false,"replicaSetName":"rs0"}},"level":"info","message":"[check-connection]"} {"connection":{"servers":[{"host":"masked-db-0.mongodb-replicaset","port":27017},{"host":"masked-host.mongodb-replicaset","port":27017},{"host":"masked-host.mongodb-replicaset","port":27017}],"connectionName":"product - ae","url":"","authenticationType":"scram_sha_1","databaseName":"admin","scram_sha_1":{"username":"","password":"","authSource":"masked-db"},"options":{"connectionTimeout":"","socketTimeout":"","readPreference":"primary","connectWithNoPrimary":false,"replicaSetName":"rs0"}},"level":"info","message":"[save-connection]"} {"connectionUrl":"mongodb://masked_user:[email protected]:27017,masked-host.mongodb-replicaset:27017,masked-host.mongodb-replicaset:27017/?authSource=masked-db&readPreference=primary&connectTimeoutMS=3000&socketTimeoutMS=5000&replicaSet=rs0&authMechanism=SCRAM-SHA-1","options":{"useNewUrlParser":true,"useUnifiedTopology":true,"authSource":"masked-db"},"sessionId":"ZnWXsY2mRPv4Ydjpr","level":"debug","message":"[connect]"} {"sessionLength":"1","level":"info","message":"[connect]"} {"externalError":"not authorized on admin to execute...