User Tag returning incorrect value

[chris_tudor]

I'm having trouble with User Tags in a recently added application within Dynatrace. This application is the EU equivalent of our existing UK application. Both of which use the same cookie named "FullName"

FullName=Application Support&UserName=applicationsupport@test-domain.com&HMAC=85aef4f304a24ea0e6b1977fd22c302128b29eb9b10bca8e4958638091e90fe4&FirstName=Application

I want Dynatrace to pick up just the UserName and return that as the User Tag. As this is the same as the UK, I copied the Regex used to cleanup the cookie, which works fine in the UK:

\bUserName=([^&]*)

The UK returns 'applicationsupport@test-domain.com' without issue, but what's being returned in the EU application is 'FullName=Ap'

Can anyone think of a reason why Dynatrace would be doing this?

[skrystosik · Accepted solution]

In general it should be correct. You can try catch whole cookie and check if there isn't any strange part that may corrupt your results.

Sebastian

[chris_tudor]

Thanks Sebastian, hadn't thought to check that. It's now returning just Anonymous user sessions, no cookie value at all.

[skrystosik]

Strange, do you have access to this application from front? If yes maybe you should check cookies in development tools in chrome and see if there is anything suspicious there.

Sebastian

[chris_tudor]

Yes, this where I confirmed the value of the cookie to build the regex from.

[skrystosik]

I suggest support ticket than, maybe some debug flags will expose what is wrong here 🙂

Sebastian