# IJobShard.TryStartAttemptAsync(IJobRunContext, CancellationToken)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.durablejobs/orleans.durablejobs.ijobshard/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.durablejobs/orleans.durablejobs.ijobshard/methods/)

```csharp
public abstract Task<DurableJobMutationResult> TryStartAttemptAsync(IJobRunContext jobContext, CancellationToken cancellationToken)
```

Attempts to reserve a dequeued durable job for execution.

### Parameters

- `jobContext` (`IJobRunContext`): The dequeued job context.
- `cancellationToken` (`CancellationToken`): A token to cancel the operation.

### Returns

A task containing [DurableJobMutationResult](/orleans/docs/api/csharp/microsoft.orleans.durablejobs/orleans.durablejobs.durablejobmutationresult/) when the attempt may start, [DurableJobMutationResult](/orleans/docs/api/csharp/microsoft.orleans.durablejobs/orleans.durablejobs.durablejobmutationresult/) when cancellation or completion removed the job first, or [DurableJobMutationResult](/orleans/docs/api/csharp/microsoft.orleans.durablejobs/orleans.durablejobs.durablejobmutationresult/) when this shard is no longer locally owned.