How to track down rogue persistence values?

 
 when CLIENT_ACCEPTED { 
   set lastPersist "" 
 } 
  
 when HTTP_REQUEST { 
    Some semi-complicated logic runs to set this, but isn't relevant to the 
    issue.  This will either set a real persistence value or one of the 
    constants used by the switch statement later. 
   set persistVal "" 
  
    Browsers tend to reuse connections when they can.  Webservers see each 
    request as separate, but the load balancer works on connections, not 
    requests.  Since the requests in the same connection may not share the 
    same perrsistence data we need to do an LB::detach to cause the request to 
    be routed properly.   
   if { $lastPersist != "" and $persistVal != $lastPersist } { 
     LB::detach 
   } 
  
   set lastPersist $persistVal 
  
    We only want to set persistence when there is persistence data in the 
    request. Static requests don't need any persistence.  We still set the 
    lastPersist value though so that we can detect when the persistence value 
    has changed. 
   switch -- $persistVal { 
     "STATICREQ" { 
        Don't set any persistence for the request 
       persist none 
     } 
     "NOPERSIST" { 
        Don't set any persistence for the request 
       persist none 
     } 
     default { 
       log local0. "HTTP setting persist to: $persistVal" 
       persist uie $persistVal 
     } 
   } 
 }