This is the log output:
Dec 17 14:37:20 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: authenticated
Dec 17 14:37:20 raspberrypi rsyslogd-2007: action 'action 17' suspended, next retry is Thu Dec 17 14:38:50 2015 [try [www.rsyslog.com] ]
Dec 17 14:37:20 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: associated (aid 1)
Dec 17 14:37:20 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a RADIUS: starting accounting session 56722F4C-00000009
Dec 17 14:37:51 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: disassociated
Dec 17 14:37:52 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)
Dec 17 14:37:20 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: authenticated
Dec 17 14:37:20 raspberrypi rsyslogd-2007: action 'action 17' suspended, next retry is Thu Dec 17 14:38:50 2015 [try [www.rsyslog.com] ]
Dec 17 14:37:20 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: associated (aid 1)
Dec 17 14:37:20 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a RADIUS: starting accounting session 56722F4C-00000009
Dec 17 14:37:51 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: disassociated
Dec 17 14:37:52 raspberrypi hostapd: wlan0: STA 34:fc:ef:e2:9f:2a IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)