class ActiveRecord::ConnectionAdapters::ConnectionPool

def disconnect(raise_on_acquisition_timeout = true)

spec.db_config.checkout_timeout * 2 seconds).
connections in the pool within a timeout interval (default duration is
- ActiveRecord::ExclusiveConnectionTimeoutError if unable to gain ownership of all
Raises:

Disconnects all connections in the pool, and clears the pool. 
def disconnect(raise_on_acquisition_timeout = true)
  with_exclusively_acquired_all_connections(raise_on_acquisition_timeout) do
    synchronize do
      @connections.each do |conn|
        if conn.in_use?
          conn.steal!
          checkin conn
        end
        conn.disconnect!
      end
      @connections = []
      @available.clear
    end
  end
end