SAM AWS Lambda可以工作，但在报告超时问题时不会返回

编程问答 2022-06-07

问题描述

我在运行通过AWS SAM API工具发现的AWS SAM Lambda函数时遇到了一个奇怪的问题。我的lambda请求已完全完成，但对该函数的调用未收到任何响应。

技术：Windows 10 + AWS CLI + AWS SAM + IntelliJ（已安装AWS工具箱）

我从命令行运行SAM。

尝试纠正此问题的方法包括：

  • 使用WSL重新安装Windows版Docker
  • 清除了Docker的所有数据文件夹
  • 丢弃所有docker容器和图像
  • 使用Hyper-V在没有WSL的情况下运行Docker
  • 完全重新安装后，从头开始重新安装AWS CLI和SAM CLI
  • 修复AWS CLI和SAM CLI
  • 重新启动计算机
  • 将template.yaml中的时间更新为10秒
  • 上述各项的组合

仍然没有回应。该功能是Intellij为node.js 12创建的基本功能。console.log语句起作用。奇怪的是，它似乎在前几次尝试中都有效，但是变得无响应，我尝试使用无服务器来匹配NodeJS for CORS中的aws-lambda api软件包示例。

我的app.js代码：

// const axios = require('axios')
// const url = 'http://checkip.amazonaws.com/';
let response;

/**
 *
 * Event doc: https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html#api-gateway-simple-proxy-for-lambda-input-format
 * @param {Object} event - API Gateway Lambda Proxy Input Format
 *
 * Context doc: https://docs.aws.amazon.com/lambda/latest/dg/nodejs-prog-model-context.html 
 * @param {Object} context
 *
 * Return doc: https://docs.aws.amazon.com/apigateway/latest/developerguide/set-up-lambda-proxy-integrations.html
 * @returns {Object} object - API Gateway Lambda Proxy Output Format
 * 
 */
exports.lambdaHandler = async (event,context,callback) => {
    console.log('Received event:',JSON.stringify(event,null,2));
    context.callbackWaitsForEmptyEventLoop = false
    try {
        // const ret = await axios(url);
        response = {
            'statusCode': 200,'body': JSON.stringify({
                message: 'hello world',// location: ret.data.trim()
            })
        }
    } catch (err) {
        console.log('[Handler] - Main function: ',err);
        return err;
    }
    console.log(response)
    callback(null,response) 
    //return response * also fails with the same output
};

我的template.yml：

AWstemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  AWS

  Sample SAM Template for AWS
  
# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    Timeout: 3

Resources:
  HelloWorldFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      CodeUri: hello-world/
      Handler: app.lambdaHandler
      Runtime: nodejs12.x
      Events:
        HelloWorld:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            Path: /hello
            Method: get

Outputs:
  # ServerlessRestApi is an implicit API created out of Events key under Serverless::Function
  # Find out more about other implicit resources you can reference within SAM
  # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
  HelloWorldApi:
    Description: "API Gateway endpoint URL for Prod stage for Hello World function"
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/hello/"
  HelloWorldFunction:
    Description: "Hello World Lambda Function ARN"
    Value: !GetAtt HelloWorldFunction.Arn
  HelloWorldFunctionIamRole:
    Description: "Implicit IAM Role created for Hello World function"
    Value: !GetAtt HelloWorldFunctionRole.Arn

用于启动lambda的命令[使用start-api发生相同的错误]： sam local start-lambda

Docker正在运行。

该命令随后用于测试功能：

aws lambda invoke --function-name "HelloWorldFunction" --endpoint-url "http://127.0.0.1:3001" --no-verify-ssl out.txt

控制台日志：

Mounting C:\xxxxx\HelloWorldFunction as /var/task:ro,delegated inside runtime container
EST←[0m
2020-10-20T02:19:57.531Z        52435aa1-18cd-10ea-6238-f3065012cca7
2020-10-20T02:19:57.535Z        52435aa1-18cd-10ea-6238-f3065012cca7
        INFO    { statusCode: 200,body: '{"message":"hello world"}' }
←[32mEND RequestId: 52435aa1-18cd-10ea-6238-f3065012cca7←[0m
←[32mREPORT RequestId: 52435aa1-18cd-10ea-6238-f3065012cca7     Init Duration: 289.89 ms        Duration: 8.17 ms       Billed Duration: 100 ms
        Memory Size: 128 MB     Max Memory Used: 48 MB  ←[0m
Function 'HelloWorldFunction' timed out after 3 seconds
Invoking app.lambdaHandler (nodejs12.x)
Skip pulling image and use local one: amazon/aws-sam-cli-emulation-image-nodejs12.x:rapid-1.6.2.

Mounting  C:\xxxxx\HelloWorldFunction as /var/task:ro,delegated inside runtime container
←[32mSTART RequestId: be9410b4-deee-1639-5c0d-b08114bfb814 Version: $LATEST←[0m
2020-10-20T02:20:26.016Z        be9410b4-deee-1639-5c0d-b08114bfb814
        INFO    Received event: {}
2020-10-20T02:20:26.021Z        be9410b4-deee-1639-5c0d-b08114bfb814
        INFO    { statusCode: 200,body: '{"message":"hello world"}' }
←[32mEND RequestId: be9410b4-deee-1639-5c0d-b08114bfb814←[0m
←[32mREPORT RequestId: be9410b4-deee-1639-5c0d-b08114bfb814     Init Duration: 163.68 ms        Duration: 9.80 ms       Billed Duration: 100 ms
        Memory Size: 128 MB     Max Memory Used: 46 MB  ←[0m
Function 'HelloWorldFunction' timed out after 3 seconds

有人知道这个问题可能是什么吗？我该如何解决？

解决方法

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aws-api-gatewayaws-cliaws-lambdaaws-samaws-sam-cli