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Cloud Management Platform, Stack Provisioning fails with below error when the Catalog item/Blueprint  created from CFT (CloudFormation Template) 

Error Detail from CAPI 

java.lang.RuntimeException: Failed to execute API - Failed with status code and message: 400: <?xml version="1.0" encoding="UTF-8"?>
<Error><Code>XAmzContentSHA256Mismatch</Code><Message>The provided 'x-amz-content-sha256' header does not match what was computed.</Message><ClientComputedContentSHA256>89d57bc62e30081f7b4d5367fc51ea4afa58f2f3a0a70e56d1b0feaa65fb1229</ClientComputedContentSHA256><S3ComputedContentSHA256>0b55a3737003658da1ba8d61cf4a2840b2f210e442b15519555474a36d589526</S3ComputedContentSHA256><RequestId>BD30EB678201A852</RequestId><HostId>2anYA+PBX6niXqupxKBBuDKm3HRG268eKw8lrJ6nXwAr/dAYqC4lGB16416Q4dMDeCbhUzdu1w8=</HostId></Error> (script_include:CloudRESTAPIInvoker; line 125)
at com.snc.cmp.connector.cloud.script.js.JavaScriptProducer.process(JavaScriptProducer.java:57)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:145)
at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:468)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)
at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:62)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190)
at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109)
at org.apache.camel.processor.UnitOfWorkProducer.process(UnitOfWorkProducer.java:68)
at org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:412)
at org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:380)
at org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:270)
at org.apache.camel.impl.ProducerCache.sendExchange(ProducerCache.java:380)
at org.apache.camel.impl.ProducerCache.send(ProducerCache.java:238)
at org.apache.camel.impl.DefaultProducerTemplate.send(DefaultProducerTemplate.java:128)
at org.apache.camel.impl.DefaultProducerTemplate.sendBodyAndHeaders(DefaultProducerTemplate.java:253)
at org.apache.camel.impl.DefaultProducerTemplate.requestBodyAndHeaders(DefaultProducerTemplate.java:313)
at org.apache.camel.impl.DefaultProducerTemplate$10.call(DefaultProducerTemplate.java:588)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

Route Error from CAPI 

java.lang.RuntimeException: Failed to execute API - Failed with status code and message: 403: <ErrorResponse xmlns="http://cloudformation.amazonaws.com/doc/2010-05-15/">
<Error>
<Type>Sender</Type>
<Code>AccessDenied</Code>
<Message>User: arn:aws:iam::696619222101:user/aalabs-dev-ServiceNow-user is not authorized to perform: cloudformation:CreateStack on resource: arn:aws:cloudformation:ap-southeast-2:696619222101:stack/aalabs-staging-lablab97620190103151302805/*</Message>
</Error>
<RequestId>19c02be9-0efd-11e9-b3c6-636b75993c08</RequestId>
</ErrorResponse>
(script_include:CloudRESTAPIInvoker; line 125)
at com.snc.cmp.connector.cloud.script.js.JavaScriptProducer.process(JavaScriptProducer.java:57)
at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:145)
 

Environment

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Kingston P* & London P* using AWS CFT

Steps to Reproduce 

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• Login to the instance
• Create a Cloud Formation Template (Use an AWS CloudFormation template) 
• Try creating the Template using attached "CFT-Example_Error"
• Navigate to Cloud User Portal >> Launch a Stack >> Verify the newly created catalog item from the CFT >> Launch 
• Provide information as per the "General info" and "Provision" at the stack page >> Submit 
• We can observe below error while the Provision fails with error mentioned above.

Cause 

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• The CFT which is being used might have no invalid information.
• The User has no permissions to execute some of the parameters provided in the CFT.

Resolution

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• Communicate with AWS team for best practices on using CFT and modify the CFT accordingly.
• Suggested to have the CFT verified with AWS if it can provision a VM successfully without ServiceNow CMP
• If the CFT have no issues to provision at AWS using the user it is mean the same will not have issues provision from ServiceNow CMP.
• Verify attached files "CFT-Example_Error" vs "CFT-Example_Good" to understand the issues and fix them accordingly along with AWS SME.