I am writing a cloudformation template for creating an aws step function and statemachine. Following is the part of my template which is causing the error
AWSTemplateFormatVersion: 2010-09-09
Transform:
- StepFunctionsYamlTransform
StepFunctionsStateMachine:
Type: AWS::StepFunctions::StateMachine
Properties:
StateMachineName: MyStack
RoleArn: !GetAtt StateMachineRole.Arn
DefinitionStringYaml: !Sub
- |
Comment: My-Stack-workflow
StartAt: LambdaToStart
TimeoutSeconds: 43200
States:
LambdaToStart:
Type: Task
Resource: "${LambdaToStartArn}"
Next: WaitToWriteInS3
WaitToWriteInS3:
Type: Wait
Seconds: 5
Next: Batch_Job_1
Batch_Job_1:
Type: Task
Next: LambdaForTriggerEmrJob
Resource: arn:aws:states:::batch:submitJob.sync
Parameters:
JobName: "${BatchJob1}"
JobDefinition: "${BatchJob1DefinitionArn}"
JobQueue: arn:aws:batch:${AWS::Region}:${AWS::AccountId}:job-queue/${QueueName}
LambdaForTriggerEmrJob:
Type: Task
Resource: "${LambdaForEmrArn}"
Next: WaitFoEmrState
WaitFoEmrState:
Type: Wait
Seconds: 90
Next: CheckEmrState
CheckEmrState:
Type: Task
Resource: "${ClusterStateCheckArn}"
InputPath: "$.input.cluster" # Values coming from lambda
ResultPath: "$.input.cluster" # Values coming from lambda
Retry: *LambdaRetryConfig
Next: IsClusterRunning
IsClusterRunning:
Type: Choice
Default: WaitFoEmrState
Choices:
- Variable: "$.input.cluster.state"
StringEquals: FAILED
Next: StateMachineFailure
- Variable: "$.input.cluster.state" # Values coming from lambda
StringEquals: SUCCEEDED
Next: FinalBatchJob
StateMachineFailure:
Type: Fail
FinalBatchJob:
Type: Task
Resource: arn:aws:states:::batch:submitJob.sync
Parameters:
JobName: "${FinalBatch}"
JobDefinition: "${FinalBatchDefinitionArn}"
JobQueue: arn:aws:batch:${AWS::Region}:${AWS::AccountId}:job-queue/${QueueName
End: true
- LambdaToStartArn: !GetAtt LambdaToStart.Arn
LambdaForEmrArn: !GetAtt LambdaForEmr.Arn
BatchJob1DefinitionArn: !Ref BatchJob1Definition
FinalBatchDefinitionArn: !Ref FinalBatchDefinition
BatchJob1: !Sub ${AWS::StackName}-batch-1
FinalBatch: !Sub ${AWS::StackName}-final-batch
ClusterStateCheckArn: !Sub arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:cluster-state
It returns the following error
Failed to create the changeset: Waiter ChangeSetCreateComplete failed:
Waiter encountered a terminal failure state Status: FAILED. Reason:
Transform {AWS::AccountId}::StepFunctionsYamlTransform failed without an
error message.
Can anyone help in recognising the solution to this? I can't debug a lot since it fails without an error message. TIA
AWS cloudformation errors are sometimes quite wierd and its difficult to debug them. But I found the error. It was 9th line JobQueue: arn:aws:batch:${AWS::Region}:${AWS::AccountId}:job-queue/${QueueName and one can easily see that I missed } at the end. So it was a syntax error