CAPWAP goes down but AP is up

I have a few APs that keep doing this where WCS generates alarms saying that the AP is down and a/b/g interface is all down. If I check the WCS, I see the AP up for more than 10 days or so but the CAPWAP is up only for 4 minutes. Eventually clients associate to that AP but they see downtime.
Is it because the AP is bad (hardware issue)?
CAPWAP Up Time
4 m 17 s
AP Up Time
10 d 0 h 24 m 4 s
Meena

Well based on the uptime we know one thing is for sure. Something interrupted the capwap tunnel between the AP and the WLC and this is what triggered the alarm. And you are correct. Clients will be impacted. The most common thing you will see is that the AP moves from one WLC to another WLC. However, if you are sure this is not the case.
Then something else could have intruped the tunnel.
Down vlan
A number of missed heart beats (between the AP and WLC)
Routing issue
I know... Im strecthing it ... The list could go on ...
shoot me an email of the address. I can shoot over at lunch ...

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