Serverless-application-model: Model validation failed (#/EventSourceArn: failed validation constraint for keyword [pattern])

[lowerzero]

Description:

Unable to create stack with example generated during "init" command

sam --version
SAM CLI, version 1.2.0

Steps to reproduce the issue:

1. sam init
2. 1 - AWS Quick Start Templates
3. 1 - nodejs12.x
4. Project name [sam-app]:
5. 7 - Quick Start: SQS
   6 sam deploy --template-file template.yml --stack-name sam-test --capabilities CAPABILITY_IAM --region eu-west-1 --s3-bucket

Observed result:

Uploading to 3f4c15d7488e699c3fa25c0e11ffadb9  6535 / 6535.0  (100.00%)

        Deploying with following values
        ===============================
        Stack name                 : sam-test
        Region                     : eu-west-1
        Confirm changeset          : False
        Deployment s3 bucket       : <blah-blah>
        Capabilities               : ["CAPABILITY_IAM"]
        Parameter overrides        : {}

Initiating deployment
=====================
Uploading to 4aafdb944a682601b1c232b6459dc28f.template  717 / 717.0  (100.00%)

Waiting for changeset to be created..

CloudFormation stack changeset
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Operation                                                       LogicalResourceId                                               ResourceType                                                  
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Add                                                           SQSPayloadLoggerRole                                            AWS::IAM::Role                                                
+ Add                                                           SQSPayloadLoggerSQSQueueEvent                                   AWS::Lambda::EventSourceMapping                               
+ Add                                                           SQSPayloadLogger                                                AWS::Lambda::Function                                         
+ Add                                                           SimpleQueue                                                     AWS::SQS::Queue                                               
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Changeset created successfully. arn:aws:cloudformation:eu-west-1:174036874613:changeSet/samcli-deploy1599221902/475d136d-e501-4476-a000-00c8b4487263


2020-09-04 13:18:28 - Waiting for stack create/update to complete

CloudFormation events from changeset
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ResourceStatus                                  ResourceType                                    LogicalResourceId                               ResourceStatusReason                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
CREATE_IN_PROGRESS                              AWS::IAM::Role                                  SQSPayloadLoggerRole                            -                                             
CREATE_IN_PROGRESS                              AWS::SQS::Queue                                 SimpleQueue                                     -                                             
CREATE_IN_PROGRESS                              AWS::IAM::Role                                  SQSPayloadLoggerRole                            Resource creation Initiated                   
CREATE_IN_PROGRESS                              AWS::SQS::Queue                                 SimpleQueue                                     Resource creation Initiated                   
CREATE_COMPLETE                                 AWS::SQS::Queue                                 SimpleQueue                                     -                                             
CREATE_COMPLETE                                 AWS::IAM::Role                                  SQSPayloadLoggerRole                            -                                             
CREATE_IN_PROGRESS                              AWS::Lambda::Function                           SQSPayloadLogger                                -                                             
CREATE_IN_PROGRESS                              AWS::Lambda::Function                           SQSPayloadLogger                                Resource creation Initiated                   
CREATE_COMPLETE                                 AWS::Lambda::Function                           SQSPayloadLogger                                -                                             
CREATE_IN_PROGRESS                              AWS::Lambda::EventSourceMapping                 SQSPayloadLoggerSQSQueueEvent                   -                                             
CREATE_FAILED                                   AWS::Lambda::EventSourceMapping                 SQSPayloadLoggerSQSQueueEvent                   Model validation failed (#/EventSourceArn:    
                                                                                                                                                failed validation constraint for keyword      
                                                                                                                                                [pattern])                                    
ROLLBACK_IN_PROGRESS                            AWS::CloudFormation::Stack                      sam-test                                        The following resource(s) failed to create:   
                                                                                                                                                [SQSPayloadLoggerSQSQueueEvent]. . Rollback   
                                                                                                                                                requested by user.                            
DELETE_COMPLETE                                 AWS::Lambda::EventSourceMapping                 SQSPayloadLoggerSQSQueueEvent                   -                                             
DELETE_IN_PROGRESS                              AWS::SQS::Queue                                 SimpleQueue                                     -                                             
DELETE_IN_PROGRESS                              AWS::Lambda::Function                           SQSPayloadLogger                                -                                             
DELETE_COMPLETE                                 AWS::Lambda::Function                           SQSPayloadLogger                                -                                             
DELETE_IN_PROGRESS                              AWS::IAM::Role                                  SQSPayloadLoggerRole                            -                                             
DELETE_COMPLETE                                 AWS::IAM::Role                                  SQSPayloadLoggerRole                            -                                             
DELETE_COMPLETE                                 AWS::SQS::Queue                                 SimpleQueue                                     -                                             
ROLLBACK_COMPLETE                               AWS::CloudFormation::Stack                      sam-test                                        -                                             
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Error: Failed to create/update the stack: sam-test, Waiter StackCreateComplete failed: Waiter encountered a terminal failure state

Expected result:
working example

[MitchellMcKenna]

Ran into this issue as well, was able to fix it by using !GetAtt instead of Fn::GetAtt in the template as mentioned in similar issue here: https://github.com/aws/aws-sam-cli-app-templates/pull/42

[Envek]

Faced it too. Changing Fn::GetAtt to !GetAtt and executing sam build before deploy helped me (thanks for sharing!). Also I had to delete failed CloudFromation stack manually via AWS web console