Removing persistence/cookie on outage pool?

Hello,

 

I have a production pool and a 404server pool. I currently have this iRule configured on my production virtual server:

 

 

when HTTP_REQUEST {

 

if { [active_members pool_lab-www] == 0 } {

 

pool pool_lab-404server

 

}

 

}

 

 

I'm running into an issue where when the nodes are down in my pool_lab-www and the pool_lab-404server is used my persistence/cookies are still being sent. Is there a way to remove the cookies when the pool is switched to the 404server?

 

 

Thank you all in advance.

 

 

-Dan