# IFailedSessionBackoffProvider

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/Placement/Rebalancing/IFailedSessionBackoffProvider.cs#L12)

```csharp
public interface IFailedSessionBackoffProvider : IBackoffProvider
```

Determines how long to wait between successive rebalancing sessions, if an aprior session has failed.

## Remarks

A session is considered "failed" if n-consecutive number of cycles yielded no significant improvement to the cluster's entropy.