# JobShard.TryStartAttemptAsync(IJobRunContext, CancellationToken)

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

[Source](https://github.com/dotnet/orleans/blob/1644940b035c7bdf215a4fd7135757c06bcfe9ec/src/Orleans.DurableJobs/JobShard.cs#L203-L215)

```csharp
public 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.