InternalFailure error from Pipeline Resolver

Question

**Scenario**:  
I've created a basic Amplify project and am adding additional configuration (specifically a Pipeline Resolver) via CloudFormation. After pushing, everything looks okay and I can view the resolver in the console.  
However, on executing a query, which invokes the resolver, I am getting an error of type "InternalFailure" and message "An internal failure occurred while resolving this field."  
  
**Schema**  
type Employee @model {  
	id: ID!  
	legacyId: Int  
	firstName: String  
	lastName: String  
	role: String  
}  
  
type Query {  
	getEmployeeV2(id: ID!): Employee  
}  
  
**Query**  
query GetEmployee {  
      getEmployeeV2(id: 123) {  
        id  
        firstName,  
    	lastName  
      }  
    }  
  
The vtls contain the default settings for DynamoDB datasource.   
  
The logs show nothing but ExecutionSummary, RequestSummary and Req/Resp Headers - nothing pertinent to this issue (as far as I can see).   
  
Has anyone seen this sort of issue?   
Thanks

Answer

I've determined the cause of the error. The Pipeline Resolver 'Before mapping template' and 'After mapping template' were empty! They were being created from over-ride files in the project which were set as empty files (or rather, just comments).   
  
The fix, of course, if to set the 'before template' to {} and the 'After template' to $util.toJson($ctx.result)

Answer

Can you provide graphQlApiId and timestamp so that we can do further investigation?

Answer

Hello I am facing the same error even though I have set {} in Before Mapping Template.  
  
**Before Mapping Template:**  
  
{}  
  
**Function Request Mapping Template:**  
  
#set( $attribs = $util.dynamodb.toMapValues($context.args.input) )  
{  
    "operation" : "PutItem",  
    "key" : {  
        ## If object "id" should come from GraphQL arguments, change to $util.dynamodb.toDynamoDBJson($ctx.args.id)  
        "id": $util.dynamodb.toDynamoDBJson($util.autoId()),  
    },  
    "attributeValues" : $util.dynamodb.toMapValuesJson($attribs)  
}  
  
**Function Response Mapping Template:**  
  
#if($ctx.error)  
    $util.error($ctx.error.message, $ctx.error.type)  
#end  
## Pass back the result from DynamoDB. **  
$util.toJson($ctx.result)  
  
**After Mapping Template:**   
  
$util.toJson($ctx)

InternalFailure error from Pipeline Resolver

Pass back the result from DynamoDB. **

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