SSM GetParameter is not resolving anymore after upgrading to aws-sdk-go-v2 v1.23.1

[matthiasbruns]

Describe the bug

So after updating my AWS SDK dependencies to the following, for some reason SSM.GetParameter is not working anymore

Dependencies new:

	github.com/aws/aws-sdk-go-v2 v1.23.1
	github.com/aws/aws-sdk-go-v2/config v1.23.0
	github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue v1.12.3
	github.com/aws/aws-sdk-go-v2/service/dynamodb v1.25.3
	github.com/aws/aws-sdk-go-v2/service/sqs v1.28.0
	github.com/aws/aws-sdk-go-v2/service/ssm v1.42.1

Dependencies old:

	github.com/aws/aws-sdk-go-v2 v1.22.2
	github.com/aws/aws-sdk-go-v2/config v1.23.0
	github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue v1.12.1
	github.com/aws/aws-sdk-go-v2/service/dynamodb v1.25.1
	github.com/aws/aws-sdk-go-v2/service/sqs v1.28.0
	github.com/aws/aws-sdk-go-v2/service/ssm v1.42.1

Expected Behavior

ssmValue, err := ssmClient.GetParameter(ctx, &ssm.GetParameterInput{
	Name:           aws.String(" " + envValue),
	WithDecryption: aws.Bool(true),
})

if err != nil {
	log.Fatalf("unable to get \"%s\", with error: %v", envValue, err)
}

should work for existing ssm params, when account has access to them.

Current Behavior

2023/11/27 12:15:44 unable to get NAME, with error: not found, ResolveEndpointV2

where NAME is the full name of an SSM param, e.g /my/best/ssm/ever with SecureString set as type

Reproduction Steps

// credentials must be in env - locally I use AWS_PROFILE with AWS_REGION, and in AWS, I use the lambda env
func main(){
	ctx := context.Background()
	cfg, err := config.LoadDefaultConfig(ctx)
	if err != nil {
		log.Fatalf("unable to load SDK config, %v", err)
	}
	ssmClient := ssm.NewFromConfig(cfg)
	
	ssmValue, err := ssmClient.GetParameter(ctx, &ssm.GetParameterInput{
		Name:           aws.String("/my/best/ssm/ever"),
		WithDecryption: aws.Bool(true),
	})

	if err != nil {
		log.Fatalf("unable to get \"%s\", with error: %v", envValue, err)
	}

	// expecting to have a valid ssmValue at this point, but `err != nil`

Using the AWS CLI with the same profile locally or in the AWS account returns a valid SSMParameter with the requested name.

Possible Solution

I had to downgrade back to

	github.com/aws/aws-lambda-go v1.41.0
	github.com/aws/aws-sdk-go-v2 v1.22.2
	github.com/aws/aws-sdk-go-v2/config v1.23.0
	github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue v1.12.1
	github.com/aws/aws-sdk-go-v2/service/dynamodb v1.25.1
	github.com/aws/aws-sdk-go-v2/service/sqs v1.28.0
	github.com/aws/aws-sdk-go-v2/service/ssm v1.42.1

Additional Information/Context

AWS Go SDK V2 Module Versions Used

github.com/aws/aws-sdk-go-v2 v1.23.1
github.com/aws/aws-sdk-go-v2/config v1.23.0
github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue v1.12.3
github.com/aws/aws-sdk-go-v2/service/dynamodb v1.25.3
github.com/aws/aws-sdk-go-v2/service/sqs v1.28.0
github.com/aws/aws-sdk-go-v2/service/ssm v1.42.1

Compiler and Version used

go1.21.3

Operating System and version

darwin/arm64

[lucix-aws]

see #2370

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