首先，我在stackoverflow上检查了整个问题，但找不到解决方案。当我尝试通过 npm run dev 运行我的应用程序时，一切正常。当我尝试在 VS Code 中保存某些内容时（应用程序崩溃，因为某些内容在端口 5000 上运行）然后我必须一遍又一遍地更改终端、npx kill-port 5000 和 npm run dev。
require("dotenv").config();
const express = require("express");
const app = express();
const productRoutes = require("./routes/productRoutes");
const connectDB = require("./config/db");
const path = require("path");
if(process.env.NODE_ENV === 'production') {
app.use(express.static('../client/build'));
app.get('*', (req,res) => {
res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'));
});
}
connectDB();
app.use(express.json());
app.get("/", (req, res) => {
res.json({ message: "API running..." });
});
app.use("/api/products", productRoutes);
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => console.log(`Server running on port ${PORT}`));
Package.json
"scripts": {
"server": "nodemon backend/server.js",
"client": "npm start --prefix client",
"dev": "concurrently \"npm run server\" \"npm run client\"",
"data:import": "node backend/seederScript",
"build": "cd client && npm run build",
"install-client": "cd client && npm install",
"heroku-postbuild": "NPM_CONFIG_PRODUCTION=false npm install --prefix client && npm run build --prefix client",
"develop": "concurrently --kill-others-on-fail \"npm run server\" \"npm run start --prefix client\"",
"start": "concurrently --kill-others-on-fail \"npm run server\" \"npm run start --prefix client\""
},
当我尝试在本地运行 heroku 时，即使我杀死了该端口，该端口上也已经运行了一些东西
https://github.com/TomaszSygut/Shopping-cart
如果有人知道发生了什么，请帮助我。我已经在那个奇怪的错误上花了 2 天时间
答案 0 :(得分：0)
2021-06-23T12:12:46.000000+00:00 app[api]: Build started by user thomassygut@gmail.com
2021-06-23T12:14:54.513779+00:00 app[api]: Release v5 created by user thomassygut@gmail.com
2021-06-23T12:14:54.513779+00:00 app[api]: Deploy 9ceb0c19 by user thomassygut@gmail.com
2021-06-23T12:14:55.204758+00:00 heroku[web.1]: State changed from crashed to starting
2021-06-23T12:14:57.000000+00:00 app[api]: Build succeeded
2021-06-23T12:15:06.592623+00:00 heroku[web.1]: Starting process with command `npm start`
2021-06-23T12:15:09.222001+00:00 app[web.1]:
2021-06-23T12:15:09.222019+00:00 app[web.1]: > mern-shoppingcart-redux@1.0.0 start /app
2021-06-23T12:15:09.222020+00:00 app[web.1]: > concurrently --kill-others-on-fail "npm run server" "npm run start --prefix client"
2021-06-23T12:15:09.222020+00:00 app[web.1]:
2021-06-23T12:15:09.249330+00:00 app[web.1]: sh: 1: concurrently: not found
2021-06-23T12:15:09.252247+00:00 app[web.1]: npm ERR! file sh
2021-06-23T12:15:09.252540+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2021-06-23T12:15:09.252732+00:00 app[web.1]: npm ERR! errno ENOENT
2021-06-23T12:15:09.252908+00:00 app[web.1]: npm ERR! syscall spawn
2021-06-23T12:15:09.253986+00:00 app[web.1]: npm ERR! mern-shoppingcart-redux@1.0.0 start: `concurrently --kill-others-on-fail "npm run server" "npm run start --prefix client"`
2021-06-23T12:15:09.254100+00:00 app[web.1]: npm ERR! spawn ENOENT
2021-06-23T12:15:09.254327+00:00 app[web.1]: npm ERR!
2021-06-23T12:15:09.254441+00:00 app[web.1]: npm ERR! Failed at the mern-shoppingcart-redux@1.0.0 start script.
2021-06-23T12:15:09.254573+00:00 app[web.1]: npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2021-06-23T12:15:09.263627+00:00 app[web.1]:
2021-06-23T12:15:09.263773+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2021-06-23T12:15:09.263872+00:00 app[web.1]: npm ERR! /app/.npm/_logs/2021-06-23T12_15_09_255Z-debug.log
2021-06-23T12:15:09.344222+00:00 heroku[web.1]: Process exited with status 1
2021-06-23T12:15:09.410230+00:00 heroku[web.1]: State changed from starting to crashed
2021-06-23T12:15:09.414393+00:00 heroku[web.1]: State changed from crashed to starting
2021-06-23T12:15:23.748088+00:00 heroku[web.1]: Starting process with command `npm start`
2021-06-23T12:15:26.383257+00:00 app[web.1]:
2021-06-23T12:15:26.383287+00:00 app[web.1]: > mern-shoppingcart-redux@1.0.0 start /app
2021-06-23T12:15:26.383288+00:00 app[web.1]: > concurrently --kill-others-on-fail "npm run server" "npm run start --prefix client"
2021-06-23T12:15:26.383289+00:00 app[web.1]:
2021-06-23T12:15:26.388074+00:00 app[web.1]: sh: 1: concurrently: not found
2021-06-23T12:15:26.394007+00:00 app[web.1]: npm ERR! file sh
2021-06-23T12:15:26.394493+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2021-06-23T12:15:26.394934+00:00 app[web.1]: npm ERR! errno ENOENT
2021-06-23T12:15:26.395258+00:00 app[web.1]: npm ERR! syscall spawn
2021-06-23T12:15:26.397033+00:00 app[web.1]: npm ERR! mern-shoppingcart-redux@1.0.0 start: `concurrently --kill-others-on-fail "npm run server" "npm run start --prefix client"`
2021-06-23T12:15:26.397313+00:00 app[web.1]: npm ERR! spawn ENOENT
2021-06-23T12:15:26.397658+00:00 app[web.1]: npm ERR!
2021-06-23T12:15:26.397902+00:00 app[web.1]: npm ERR! Failed at the mern-shoppingcart-redux@1.0.0 start script.
2021-06-23T12:15:26.398179+00:00 app[web.1]: npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2021-06-23T12:15:26.407147+00:00 app[web.1]:
2021-06-23T12:15:26.407449+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2021-06-23T12:15:26.407673+00:00 app[web.1]: npm ERR! /app/.npm/_logs/2021-06-23T12_15_26_400Z-debug.log
2021-06-23T12:15:26.468310+00:00 heroku[web.1]: Process exited with status 1
2021-06-23T12:15:26.643298+00:00 heroku[web.1]: State changed from starting to crashed
2021-06-23T12:16:01.052036+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=mini-shopping-app-demo.herokuapp.com request_id=c0f9a708-ddb7-4923-b5cc-b1b15fb61bca fwd="83.14.122.73" dyno= connect= service= status=503 bytes= protocol=https
2021-06-23T12:16:01.542494+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=mini-shopping-app-demo.herokuapp.com request_id=f5e95ed2-5b89-4dbc-ac4c-0b3c582ae5d1 fwd="83.14.122.73" dyno= connect= service= status=503 bytes= protocol=https
2021-06-23T12:34:24.211883+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=mini-shopping-app-demo.herokuapp.com request_id=36fe077b-9763-4056-86b7-228e9726f08a fwd="83.14.122.73" dyno= connect= service= status=503 bytes= protocol=https
2021-06-23T12:34:24.720272+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=mini-shopping-app-demo.herokuapp.com request_id=ee3de3f0-fdd8-4978-9952-76b8f487c990 fwd="83.14.122.73" dyno= connect= service= status=503 bytes= protocol=https