Remove Cookie header

Do it in a Project > Events > RequestFilter.filterRequest handler and strip the header from the low-level Apache HttpRequest. Editing request.requestHeaders only removes headers you added in the UI; the “Maintain HTTP session” cookie is injected later by the HTTP client, so you must remove it from httpRequest.

There are a few ways to do this:
- Copy-paste handler (per-step opt-out)

Add this under Project > Events > RequestFilter.filterRequest:

// Opt-out mechanism: set a custom property SkipCookies=true on any TestStep you want to exempt
def skip = request?.getPropertyValue('SkipCookies')
if (skip?.equalsIgnoreCase('true')) {
    // 1) Remove any Cookie header explicitly set in the UI
    def h = request.requestHeaders
    if (h?.containsKey('Cookie')) {
        h.remove('Cookie')
        request.requestHeaders = h
    }

    // 2) Remove Cookie headers injected by the HTTP client/session feature
    def httpRequest = context.getProperty('httpRequest')   // org.apache.http.HttpRequest
    httpRequest?.removeHeaders('Cookie')
}

On any REST/SOAP Request test step where you want no cookies, add a custom property SkipCookies=true. Everything else keeps using the session cookie.

You could also target them by name or tag instead of a property:

// Only strip cookies for these TestStep names
def target = ['Auth Probe','HealthCheck'] as Set
if (request && target.contains(request.name)) {
    def httpRequest = context.getProperty('httpRequest')
    httpRequest?.removeHeaders('Cookie')
    def h = request.requestHeaders; h?.remove('Cookie'); request.requestHeaders = h
}

And remember, header names are case-insensitive, but always call httpRequest.removeHeaders('Cookie') (capitalization doesn’t matter).

This runs early enough to affect the final wire request; you don’t need to touch SubmitListeners.

If you ever need to nuke all cookies for a specific call (not just the header), you can also temporarily clear the cookie store in a SubmitListener.beforeSubmit and restore it in afterSubmit, but the handler above should be simpler and safer.

Let me know how it goes!