Sagemaker endpoint inference returns com.amazon.coral.service#UnknownOperationException

[t2013anurag]

SDK details:

github.com/aws/aws-sdk-go-v2 v1.25.3
github.com/aws/aws-sdk-go-v2/config v1.25.1
github.com/aws/aws-sdk-go-v2/credentials v1.17.7
github.com/aws/aws-sdk-go-v2/service/sagemakerruntime v1.27.2
github.com/aws/aws-sdk-go-v2/service/sts v1.28.4

Go version:

go version go1.21.3 darwin/arm64

Sample code:

endpoint := "model-endpoint-1"
contentType := "application/json"
jsonString := `{"body":"sample text body"}`
payload := []byte(jsonString)
input := sagemakerruntime.InvokeEndpointInput{
		Body:         payload,
		EndpointName: &endpoint,
		ContentType:  &contentType,
}

output, err := client.InvokeEndpoint(ctx, &input)

This returns:

{"message":"{\"Output\":{\"__type\":\"com.amazon.coral.service#UnknownOperationException\"},\"Version\":\"1.0\"}"}

[win3zz]

Using Content-Type: application/json results in error. Instead, use Content-Type: application/x-amz-json-1.1 to resolve the issue.