Serilog writes the logs twice

Question

I'm using Serilog with Elasticsearch sink with the configurations like this:

Log.Logger = new LoggerConfiguration()
                    .MinimumLevel.Verbose()
                    .MinimumLevel.Override("Microsoft", LogEventLevel.Verbose)
                    .Enrich.FromLogContext()
                    .Enrich.WithExceptionDetails()
                    .Enrich.WithProperty("Application", "abc")
                    .Enrich.WithProperty("Environment", env.EnvironmentName)
                    .WriteTo.Elasticsearch(new ElasticsearchSinkOptions(new Uri(Configuration["LoggingEndpoint"]))
                    {
                        AutoRegisterTemplate = true,
                        CustomFormatter = new ExceptionAsObjectJsonFormatter(renderMessage: true) // Better formatting for exceptions
                    })

// and later:

services.AddLogging(loggingBuilder =>
            loggingBuilder.AddSerilog());

But I can see every log twice, with a couple of milliseconds difference in their timestamp, on the Kibana. I tried the solutions provided here, just in case they might help, but no luck.

Perhaps a bit late. But did you also configure the serilog logging inside your appsettings.json? If so it will log from code and from logging. I had some problem! — Jordy van Eijk, Oct 17 '19 at 09:25
@JordyvanEijk did you find any solution to this? I use SerilogRequestLogging and if I have an exception in my controller it's being logged two times. — jmazur, Mar 29 '21 at 20:37
@jmazur do you still have this problem? Maybe you log your exception inside the controller and rethrow it and it will be catched by your application itself? — Jordy van Eijk, May 12 '21 at 14:53

score 12 · Answer 1 · answered Aug 17 '21 at 08:28

12

This is probably the case because you are configuring Serilog inside your appsettings.json and also inside code. This wil Log everything twice.

answered Aug 17 '21 at 08:28

Jordy van Eijk

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Thank you! That was exactly the case in my code. I was using WriteTo(new JsonFormatter()) and right after it ReadFrom.Configuration. I removed the latter and now it logs properly. – virouz98 Oct 20 '21 at 10:49

Serilog writes the logs twice

1 Answers1