# ObserverFailed

Package: [Microsoft.Orleans.Core](/orleans/docs/api/csharp/microsoft.orleans.core/) 10.0.0

[NuGet package](https://www.nuget.org/packages/Microsoft.Orleans.Core) | [Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Core/Diagnostics/ClientLifecycleEvents.cs#L201)

```csharp
public sealed class ObserverFailed : LifecycleEvent
```

Event payload for when a lifecycle observer has failed.

## Constructors

- [ObserverFailed(string, int, string, SiloAddress, Exception, TimeSpan, ILifecycleObserver)](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerfailed/constructors/constructor-string-int-string-orleans-runtime-siloaddress-system-exception-syste-c8590164/)

## Fields

- [Elapsed](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerfailed/fields/elapsed-2beeeabc/)
- [Exception](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerfailed/fields/exception-36fba5f9/)
- [Observer](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerfailed/fields/observer-46aae91c/)
- [ObserverName](/orleans/docs/api/csharp/microsoft.orleans.core/orleans.core.diagnostics.clientlifecycleevents.observerfailed/fields/observername-d65ce389/)