Fn::GetAtt Arn fails on a AWS::Scheduler::Schedule

Question

I am unable to use Fn::GetAtt in a CloudFormation template to get the ARN of an AWS::Scheduler::Schedule. CloudFormation fails to update the stack with this error.

> Unable to retrieve Arn attribute for AWS::Scheduler::Schedule, with error message Resource of type 'AWS::Scheduler::Schedule' with identifier 'lops-coder-DjangoBackendClearDjangoSessionsSchedul-VZ00I61PNLJ4' was not found.

According to [the resource and policy reference for AWS::Scheduler::Schedule](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-scheduler-schedule.html#aws-resource-scheduler-schedule-return-values), Fn::GetAtt is defined for Arn.

In my CFT, I have an AWS::Scheduler::Schedule resource defined and successfully deployed.

```yaml
Resources:
  ScheduleGroup:
    Type: AWS::Scheduler::ScheduleGroup  
  DjangoBackendClearDjangoSessionsSchedule:
    Type: AWS::Scheduler::Schedule
    Properties:
      GroupName: !Ref ScheduleGroup
      # …
```

If I add an output for the schedule's ARN, CloudFormation fails with the message above. This is the only change to the template.

```yaml
Outputs:
  DjangoBackendClearDjangoSessionsScheduleArn:
    Value: !GetAtt DjangoBackendClearDjangoSessionsSchedule.Arn
```

I have confirmed that there is in fact a schedule named `lops-coder-DjangoBackendClearDjangoSessionsSchedul-VZ00I61PNLJ4` in the same account and the same region.

![Screenshot of the schedule in the AWS Console](/media/postImages/original/IMQq823lmtQDmO1K7Bk5EQYw)

Accepted Answer

I was able to reproduce it in my environment.  
It may be a bug and you should contact AWS support.

Fn::GetAtt Arn fails on a AWS::Scheduler::Schedule

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