SageMaker Javascript SDK 端点调用错误：“CustomerError：无法将有效负载解析为数值”答案

【问题标题】：SageMaker Javascript SDK Endpoint Invocation Error: "CustomerError: Unable to parse payload to numeric values"SageMaker Javascript SDK 端点调用错误：“CustomerError：无法将有效负载解析为数值”
【发布时间】：2019-01-16 20:15:22
【问题描述】：

当我在 AWS CloudWatch 上遇到此错误时，我正在从我的角度前端调用 SageMaker 端点，该错误是关于我的模型从数据中进行推断的（以逗号分隔的字符串的形式，目标值位于第一个索引处）我正在发送：无法解析数值。我用来调用端点的字符串是：“1533071820,0.05619,0.05619,0.05611,0.05611,0.006076\n”

字符串请求 = "1533071820,0.05619,0.05619,0.05611,0.05611,0.006076\n"

ByteBufferbuf = ByteBuffer.wrap(request.getBytes()); 调用端点请求.setBody(buf); Use the SageMaker API AmazonSageMakerRuntime amazonSageMaker = AmazonSageMakerRuntimeClientBuilder.defaultClient(); Invoke the model endpoint on SageMaker InvokeEndpointResult invokeEndpointResult = amazonSageMaker.invokeEndpoint(invokeEndpointRequest);

我期望从端点得到的结果是一个带有“score”属性的 JSON 对象，格式为：{"predictions": [{"score": xxxxxxx}]}

我从 IDE 日志中收到“ModelError: Unable to evaluate payload”和“无法解析 CloudWatch 上的数值”

【问题讨论】：

标签： javascript node.js aws-sdk amazon-sagemaker

【解决方案1】：

因此，在调试此问题时，我发现由于末尾的换行符，模型假设我的输入中有 2 个字符串，但只有一个。因此，错误。所以我只是将字符串更改为：“1533071820,0.05619,0.05619,0.05611,0.05611,0.006076”。如果我解析多个有效负载（批处理），它是：“1533071820,0.05619,0.05619,0.05611,0.05611,0.006076\n1533071820,0.05619,0.05619,0.05611,0.05611,0.006076 由新输入分隔字符，更重要的是，末尾没有换行符

【讨论】：