This is usually caused by a missing message or line within the beacon.
var errorT = new ADRUM.events.Error();errorT.url('http://localhost:8080/error'); // OptionalerrorT.msg('I am a custom error at line 100'); // MandatoryerrorT.line(100); // MandatoryerrorT.stack('some call stack here'); // OptionalADRUM.report(errorT);
Both the message and the line are required. If either is missing, the Collector will reject the beacon.
Where would the error end up? In a snapshot for a transaction where the given URL is related to?
@Roel.Beun Custom error events can be viewed in your Browser Snapshots. In your Controller, go to User Experience --> Select the application --> Browser Snapshots. You can also see them in Session Summaries by going to User Experience --> Select the application -> Sessions --> Select a session. Here's a example: