x-dtreferer header issue
Every so often, the x-dtreferer POST request header does not appear in a UserAction post. This results in the UserAction being "lost" and not appearing in the DynaTrace Client UI. Has anyone else run into this issue?
I have manually instrumented the JS agent into my application and, the vast majority of the time, I don't have this issue.
Do you have a web server farm? If so - is the web server agent installed on all web servers in the cluster? If one is missing it could explain that phenomenon in case a web request from the browser gets directed to a webserver that doesnt have a web server agent installed.
My testing was done with everything running on my local system (browser, Dynatrace agent, server, client). When I look at the browser-level traces, I see that the x-dtreferer POST request header is not there. Thus, even before it leaves the browser environment, the x-dtreferer is not even there. So it's as if the agent is not properly adding the header in the script.
Maybe a script blocker browser plugin? maybe a javascript error that deactivates our agent? Can you use the browser dev tools to see whether the browser could successfully download the dtagent.js and whether there are no js errors?
