Hi,
I used Serilog to enrich logs with trace IDs, allowing me to keep trace IDs in log files. However, I don't want to lose these IDs in EventHandler logs.
Example: I have a trace ID in a request, but after this request, when the event handler starts, I can't propagate the trace ID to the handler. How can I manage this situation?
Is there any other solution besides moving the trace ID with event data?
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2 Answer(s)
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Hi,
It seems you use Distributed event handler and and handler works completely separated context/thread than the original one that handles HTTP requests. So, TraceId cannot be acquired in that case.
You may want to transfer it manually while publishing the event
public class MyCustomEto { public string TraceId { get; set; } // ... }await distributedEventBus.PublishAsync(new MyCustomEventData { TraceId = httpContextAccessor.HttpContext.TraceIdentifier, // Set other properties as needed });
Why Does This Happen?
When you handle an HTTP request, the current context (including any enrichers that incorporate data like the trace ID) is maintained on the thread handling that request. By the time your event handler executes, itās on a different thread (or even a different process) where the ambient context isnāt preserved. This is why you observe that the trace ID, despite being available during the request, isnāt automatically available when the event handler starts processing the event.
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Yes, thanks. I used it that way too
