AWS AppSync 上的 GraphQL 查询后 AWS Lambda 超时

AWS Lambda timeout after GraphQL query on AWS AppSync

我按照本教程使用 Amplify 部署了 AWS AppSync GraphQL 终端节点:

https://aws-amplify.github.io/docs/js/api#amplify-graphql-client

我使用 Node.js 和 TypeScript 创建了一个 Lambda 函数来查询数据:

import { APIGatewayEvent, Callback, Context, Handler } from 'aws-lambda';
import Amplify, { API, graphqlOperation } from "aws-amplify";
import * as queries from './src/graphql/queries';
import * as mutations from './src/graphql/mutations';
import { CreateBlogInput } from './src/API';
import aws_config from "./src/aws-exports";

Amplify.configure(aws_config);

export const list: Handler = async (event: APIGatewayEvent, context: Context, cb: Callback) => {
  const allBlogs = await API.graphql(graphqlOperation(queries.listBlogs));

  // this seems to be working
  console.log(JSON.stringify(allBlogs));

  const response = {
    statusCode: 200,
    body: JSON.stringify(allBlogs),
  };

  cb(null, response);
}

现在,当我通过 HTTP 调用 Lambda 函数时,它会检索数据并将其记录到控制台。但它永远不会完成请求和响应,它总是会遇到超时,即使我将超时增加到 30 秒也是如此。 运行 突变和插入数据也是如此。

有什么想法是错误的吗?

这里的问题是您混合了 lambda 签名。

或者你使用asyncreturn(或者throw 如果出现错误):

export const list: Handler = async (event: APIGatewayEvent, context: Context, cb: Callback) => {
  // ... rest of function

  return response;
}

或者你没有使用async而你使用了callback函数:

export const list: Handler = (event: APIGatewayEvent, context: Context, cb: Callback) => {
  // ... rest of function

  cb(null, response);
}