System.ObjectDisposedException: The semaphore has been disposed.

Hello,

I am using the latest pre release version 2.0.0-beta 4 with aspnet core 3. During the execution of my production code I get a lot off errors from the Sentry client itself.

This is the output of the log.

fail: Sentry.ISentryClient[0]
      An error occured when capturing the event System.ObjectDisposedException: The semaphore has been disposed.
         at System.Threading.SemaphoreSlim.CheckDispose()
         at System.Threading.SemaphoreSlim.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
         at System.Threading.SemaphoreSlim.Wait(TimeSpan timeout)
         at Sentry.Internal.BackgroundWorker.EnqueueEvent(SentryEvent event)
         at Sentry.SentryClient.DoSendEvent(SentryEvent event, Scope scope)
         at Sentry.SentryClient.CaptureEvent(SentryEvent event, Scope scope).

Has anyone an idea what causes this? Thanks!

[bruno-garcia]

I’ve pushed a fix and will release it as 2.0.0-beta5 once zeus.ci gets back online. Tomorrow it should be up. Thank y’all for raising this.

[artyomturkin]

Same problem

• “Sentry.AspNetCore” Version=“1.2.0”
• Runtime: Asp.Net Core 2.2

fail: Sentry.ISentryClient[0]
      An error occured when capturing the event System.ObjectDisposedException: The semaphore has been disposed.
         at System.Threading.SemaphoreSlim.CheckDispose()
         at System.Threading.SemaphoreSlim.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
         at System.Threading.SemaphoreSlim.Wait(TimeSpan timeout)
         at Sentry.Internal.BackgroundWorker.EnqueueEvent(SentryEvent event)
         at Sentry.SentryClient.DoSendEvent(SentryEvent event, Scope scope)
         at Sentry.SentryClient.CaptureEvent(SentryEvent event, Scope scope).

Sentry is injected like this:

In Program.cs

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseSentry()
                .UseStartup<Startup>();

And actual injection:

public class DefaultRequestHandler : IGCVPRequestsHandler
{
    private readonly DataflowBlocks _dataflowBlocks;
    private readonly IHub _sentry;

    public DefaultRequestHandler(DataflowBlocks dataflowBlocks, IHub sentry)
    {
        _dataflowBlocks = dataflowBlocks;
        _sentry = sentry;
    }
}

And called like:

_sentry.AddBreadcrumb("Hash checked", category: "checkwithHash", level: BreadcrumbLevel.Debug);

.........

_sentry.CaptureException(e);