Can wpa_supplicant "auto" associate to 2nd AP when 1st AP shutdown

[wesley]

I setup an enviroment with two AP(using hostapd).
I satrt this two hostapd process and one wpa_supplicant.
The wpa_supplicant scan and associate with one AP(1st).
After I shutdown the 1st hostapd(kill process), wpa_supplicant doesn't
auto associate with the 2nd hostapd.
Is there any method to let wpa_supplicant auto handover to 2nd AP?

thanks a lot.