导入“aws-sdk”时 Heroku 崩溃

Question

我有 typescript node.js 应用程序，我在其中使用 Amazon S3。 它部署到 Heroku。

import express from 'express';
import cors from 'cors';
//import aws from 'aws-sdk';
import dotenv from 'dotenv';
dotenv.config();

const app = express();
app.use(express.json());
app.use(cors());

const PORT = process.env.PORT || 3001;

app.get('/ping', (request, response) => {
  console.log('ping');
  response.send('pong');
});

app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});

问题是，如果我取消注释import aws from 'aws-sdk' Heroku 会崩溃并出现以下错误：

2020-06-27T14:14:53.383764+00:00 app[web.1]: 0: ExitFrame [pc: 0x13c9819]
2020-06-27T14:14:53.383764+00:00 app[web.1]: 1: StubFrame [pc: 0x134f9b7]
2020-06-27T14:14:53.383764+00:00 app[web.1]: Security context: 0x331fe51408d1 <JSObject>
2020-06-27T14:14:53.383765+00:00 app[web.1]: 2: scanRange [0x3162672e4a49] [/app/node_modules/typescript/lib/typescript.js:~10360] [pc=0x5cca21f73b2](this=0x0635f86bb221 <Object map = 0x10a03640a1b9>,604998,223,0x3ae8c05743c9 <JSFunction (sfi = 0x2064a696fc31)>)
2020-06-27T14:14:53.383766+00:00 app[web.1]: 3: addJSDocComment(aka addJSDocComment) [0x635f86bb469] [/app/node_modules/typescript/lib/typescript.js:~1...
2020-06-27T14:14:53.383766+00:00 app[web.1]:
2020-06-27T14:14:53.383799+00:00 app[web.1]: FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
2020-06-27T14:14:53.384587+00:00 app[web.1]: 1: 0xa08900 node::Abort() [node]
2020-06-27T14:14:53.385189+00:00 app[web.1]: 2: 0xa08d0c node::OnFatalError(char const*, char const*) [node]
2020-06-27T14:14:53.385841+00:00 app[web.1]: 3: 0xb7ef5e v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, bool) [node]
2020-06-27T14:14:53.386493+00:00 app[web.1]: 4: 0xb7f2d9 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [node]
...

当我在本地运行相同的项目时，它工作正常。 当我将“aws-sdk”与常规 JavaScript 应用程序一起使用时，不会发生此错误。 我不明白为什么 Heroku 在导入“aws-sdk”时会崩溃？

下面是我的“package.json”：

{
  "name": "backend",
  "version": "1.0.0",
  "description": "",
  "main": "index.ts",
  "scripts": {
    "start": "ts-node src/index.ts",
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "ts-node-dev src/index.ts",
    "tsc": "tsc",
    "lint": "eslint --ext .ts .",
    "deploy": "git push heroku master",
    "deploy:full": "git add . && git commit -m deploy && npm run deploy && heroku logs --tail"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@typescript-eslint/eslint-plugin": "^3.1.0",
    "@typescript-eslint/parser": "^3.1.0",
    "eslint": "^7.1.0",
    "ts-node-dev": "^1.0.0-pre.49"
  },
  "dependencies": {
    "@types/aws-sdk": "^2.7.0",
    "@types/cors": "^2.8.6",
    "@types/express": "^4.17.6",
    "@types/node": "^14.0.10",
    "aws-sdk": "^2.699.0",
    "cors": "^2.8.5",
    "dotenv": "^8.2.0",
    "express": "^4.17.1",
    "ts-node": "^8.10.2",
    "typescript": "^3.9.3"
  }
}

和'Procfile'：

web ts-node src/index.ts

Answer 1

您是否考虑过仅导入库的子集？ 在导入这样的所有内容时，我遇到了同样的问题：

import AWS from 'aws-sdk';

memory 的速度超过 500mb，高于 Heroku 提供的 512mb（免费层）。 AWS SDK 似乎提供代码拆分，因此您可以只导入您需要的客户端。 在我的例子中：

import S3 from 'aws-sdk/clients/s3';

我的应用程序的 memory 保持在 200mb 左右，我能够使用该库。