microsoft / microsoft/ApplicationInsights-dotnet
Flush doesn't block until messages are actually flushed
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@rajkumar-rangaraj is already working on this.
Since Mar 12, 2026.
3.x
enhancement
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- Dominant language
- C#
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- 613
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- 301
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Description
TelemetryClient.Flush() doesn't actually block returning until the messages are flushed. This means if you're want to flush messages during application shutdown (like in Microsoft/ApplicationInsights-aspnetcore#304) then you have to add a Thread.Sleep(1000) which isn't ideal.
It would be nice if there was a blocking version of this API that took an optional timeout, such that it only blocked for the time necessary to flush the events, or the timeout is hit, so that application shutdown doesn't have to be blocked any longer than necessary.
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