Need help with iRule error log message

Kai,

first, Thanks for your effort trying to help on this & you could be right about the rule not being stable. second, as I mentioned before I am an iRules newbie, and have no idea what is this iRule is doing, I was given this project and I am still learning, I am a Cisco guy in first place.

third, I am wondering if you missed an else statement in your suggested code in the following part:

 when HTTP_REQUEST {
    if { [active_members et-pool] == 0 } {
        HTTP::redirect "http://[HTTP::header "X-Forwarded-Host"]/unavailable/etServices.html"
    } else {
        if { [HTTP::header exists "X-Forwarded-Host"] } {
            HTTP::header replace "Host" [HTTP::header "X-Forwarded-Host"]
        }
        if { [HTTP::cookie exists "em-et"] } {
           log local0. "Persisting by cookie em-et, contents are [HTTP::cookie "em-et"]"
        } else {
            set pool_member [session lookup uie [findstr [HTTP::uri] "jsessionid" 11 "!"]]
            if { $pool_member ne "" } {
                pool ets_80-pool member $pool_member
               log local0. "jsessionID [findstr [HTTP::uri] "jsessionid" 11 "!"] sent to [session lookup uie [findstr [HTTP::uri] "jsessionid" 11 "!"] ]"
            } else {
                pool ets_80-pool
               log local0. "No jsession ID, local balancing the connection..."
            }
        }
    }
}

and is it should be?

when HTTP_REQUEST {
    if { [active_members et-pool] == 0 } {
        HTTP::redirect "http://[HTTP::header "X-Forwarded-Host"]/unavailable/etServices.html"
    } else {
        if { [HTTP::header exists "X-Forwarded-Host"] } {
            HTTP::header replace "Host" [HTTP::header "X-Forwarded-Host"]
        } else{
        if { [HTTP::cookie exists "em-et"] } {
           log local0. "Persisting by cookie em-et, contents are [HTTP::cookie "em-et"]"
        } else {
            set pool_member [session lookup uie [findstr [HTTP::uri] "jsessionid" 11 "!"]]
            if { $pool_member ne "" } {
                pool ets_80-pool member $pool_member
               log local0. "jsessionID [findstr [HTTP::uri] "jsessionid" 11 "!"] sent to [session lookup uie [findstr [HTTP::uri] "jsessionid" 11 "!"] ]"
            } else {
                pool ets_80-pool
               log local0. "No jsession ID, local balancing the connection..."
            }
        }
    }
}

Thanks.