code: final void deactivateNow() {
        isActive = false;
        stats.deactivate();
        availableQueue.clear();
        reopenExecutor.getQueue().clear();
        for(ConnectionPoolConnection conn : connections) {
           conn.forceRealClose();
           conn.state.set(ConnectionPoolConnection.STATE_DISCONNECTED);
        }
     }
docs: Deactivates the pool immediately - real-closing all connections out from under the logical connections.