Forum Discussion

TechT's avatar
TechT
Icon for Nimbostratus rankNimbostratus
Jun 17, 2015

JSESSION ID and redirect

iRULE1 : I have a VIP which will redirect to specific URI when they see the HTTP Request which works fine and i have an irule for same which is below :   ===== when HTTP_REQUEST { if { not ([HTTP:...
application delivery
devops
iRules
LTM
VernonWells's avatar
VernonWells
Icon for Employee rankEmployee
Jul 02, 2015

Structurally, those should work together. I suspect that, when you perform the transparent rewrite, the server does not set the JSESSIONID for that set of URIs. That is, if a request is made for 

http://your.site.com/example/...
then JSESSIONID is not set. That would explain why the second iRule does not appear to fire when the first is set. It's trivial to test. Change iRule 2 as follows:

when HTTP_RESPONSE { 
    if { [HTTP::cookie exists "JSESSIONID"] } { 
        persist add uie [HTTP::cookie "JSESSIONID"] 
    } else {
        log local0. "No JSESSIONID cookie is present in the response"
    }
}

Then check /var/log/ltm after making a request.

If my suspicion is correct, then the fix requires a change to the server behavior, rather than BIG-IP (or you could switch to BIG-IP Cookie persistence).