Error When Connecting To Mongo Server Using IAM Role

Question

I am using Mongoid gem in Rails with IAM session token to connect with my Atlas Cluster

 def logs
  reload_mongoid_configuration
  @logs ||= Log.or(attributes_condition)
               .where(selector)
               .order_by(timestamp: :desc)
end

 def reload_mongoid_configuration
  mongo_config = Mongoid::Config.clients[:default]
  old_connection_url = mongo_config[:uri]

  return unless mongo_token_expired?(old_connection_url)

  # Disconnect existing Mongoid clients
  Mongoid.disconnect_clients

  # Logic to get mongo URL with a new AWS session token
  Mongoid.load_configuration(
    clients: {
      default: {
        uri: MongoUriGenerator.audit_log_db_url(old_connection_url),
        options: {
          database: 'my_database'

        }
      }
    }
  )
end

As I am using an aws session token I need to regenerate the URL after 1 hour. It's working fine but after some time I am getting the following error

#<Mongo::Error::NoServerAvailable: No primary server is available in cluster ...
#<Server address=<someaddress>.mongodb.net:27017 UNKNOWN NO-MONITORING pool=#<ConnectionPool size=0 (0-20) used=0 avail=0 pending=0 paused>> #<Server address=<someaddress>.mongodb.net:27017 SECONDARY replica_set=atlas-ihuqqp-shard-0 NO-MONITORING>]> with timeout=30, LT=0.015. The following servers have dead monitor threads

My connection url looks something like this

mongodb+srv://<temp_access key>:<temp_secret_key>@<mongourl>.mongodb.net/<db>?authMechanism=MONGODB-AWS&authSource=$external&authMechanismProperties=AWS_SESSION_TOKEN:IQo....