Cannot access a disposed object, Object name: 'ApplicationInsightsSink'

[slanto]

Hi, I am struggling with writing logs to App Insights from ASP.NET MVC application. I get the following exception:

Caught exception while emitting to sink Serilog.Sinks.ApplicationInsights.ApplicationInsightsSink: System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'ApplicationInsightsSink'.
   at Serilog.Sinks.ApplicationInsights.ApplicationInsightsSink.CheckForAndThrowIfDisposed()
   at Serilog.Sinks.ApplicationInsights.ApplicationInsightsSink.Emit(LogEvent logEvent)
   at Serilog.Core.Sinks.SafeAggregateSink.Emit(LogEvent logEvent)

This is my logger configuration where I write LogEvent to Traces in Application Insights.

   Log.Logger = new LoggerConfiguration()
                .MinimumLevel.Is(minimumLevel)
                .Enrich.FromLogContext()
                .Enrich.WithMachineName()
                .Enrich.WithProcessId()
                .Enrich.WithProcessName()
                .Enrich.WithProperty(LoggerFields.ApplicationName, appName)                
                .WriteTo.ApplicationInsights(TelemetryConfiguration.Active, TelemetryConverter.Traces)                
                .CreateLogger();

Because of the mentioned error, there are no any logs with Trace type in my Application Insights. Do you have any suggestions?

The following lib's version is used:

• Serilog.Sinks.ApplicationInsights 3.1.0
• Serilog 2.9.0

[angularsen]

I'm seeing the same with the same versions of nugets, on both netcoreapp2.2 and netcoreapp3.1. I am resolving TelemetryClient from host service provider on startup, also tried resolving TelemetryClient instead with no luck.

Update: Seems we had configured ILogger as transient dependency in order to look up the latest global logger instance via Log.Logger, since we had to change the instance during startup when we could resolve the TelemetryClient dependency. I'm guessing this results in asp.net disposing the logger and thus the Application Insights sink.

[nblumhardt]

Hi! 👋 Thanks for getting in touch, and sorry we were unable to respond to your request. We're in the process of bringing new maintainers onto this project, and need to close stale tickets so that we can identify which items are still important to users of the sink.

If this issue still affects you:

• Please consider whether it's a question that can be asked on Stack Overflow; if so, the serilog tag will get your question in front of many more people who can help you
• Please consider whether you can research or investigate the issue and propose a solution for other users to benefit from
• Feel free to comment here, letting us know it's still a problem

Thanks again!

[Steve887]

I am getting this error trying to log to app insights using version 4.0.0. Was there ever a resolution to this?