"Access point temporarily full" error on clients

[Cisco SE]

I have a WLC2504 (version 8.0.152.0). We have 8 access points total, a mix of 1702 and 2702. They are running version 8.0.152.0. 

We are having severe issues where clients cant connect to the network. On the phone it shows an error saying:

"Access point temporarily full". The AP with highest load has 15 clients only. Other ones are like between 5-10 clients connected. 

Ive checked the Max allowed client and its set to 0. 

All access points has been rebooted recently. 

Anyone have ideas on where i can start look?

[Rasika Nayanajith]

What is the uptime of your WLC? If it is up for a long time, better to restart and see how quickly you get these messages?

Rasika

[Cisco SE]

Uptime of WLC is 550 days. :) 

[Rasika Nayanajith]

It tells that code is stable :-)

I think worth restart and observe. Also think about moving to 8.5.x unless you have a reason to stay with 8.0.x code

HTH

Rasika