cookie persistence sendfor: http only

It doesn't need to "read" the cookie value; it's just checking to see that the cookie is set and has any value.

Can you try this to get more debug info:

when SERVER_CONNECTED {

    Save the name of the currently connected pool
   set pool_name [LB::server pool]
   log local0. "[IP::client_addr]:[TCP::client_port]: Pool $pool_name"
}
when HTTP_RESPONSE {

    Check if the response contains the persistence cookie
   if {[HTTP::cookie BIGipServer${pool_name}] ne ""}{

      log local0. "[IP::client_addr]:[TCP::client_port]: Cookie BIGipServer${pool_name} set, rewriting Set-Cookie: [HTTP::header Set-Cookie]"

       Replace the last Set-Cookie header value with the same value and ; HttpOnly appended
      HTTP::header replace Set-Cookie "[HTTP::header Set-Cookie]; HttpOnly"
   }
}
when HTTP_RESPONSE priority 501 {

    Debug logging only. Remove this once testing is complete.
   log local0. "[IP::client_addr]:[TCP::client_port]: Current Set-Cookie: [HTTP::header Set-Cookie]"

}

Aaron