英文:
how to solve:-listen EADDRINUSE: address already in use-
问题
以下是您要翻译的部分：
"As I am trying to run the webservice shown as follows:
const port = 3000;
app.get('/hello', (req, res, next) => {
res.send('Hello, World!');
});
app.listen(port, () => {
console.log('listening to port', port);
});
For the very first time, it works fine. But since then, when I run node index.js which contains the webservice mentioned above, I receive the error posted below.
To solve this issue I ran the following command:
npx kill-port 3000
but that did not solve the problem.
Please let me know if there is another way to solve this issue.
Note: I tried to use several other ports numbers, but I receive the same error message with the new port number indicated in the error message.
Error:
node:events:489
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE: address already in use :::3000"
英文:
As I am trying to run the webservice shown as follows:
const port = 3000;
app.get('/hello', (req, res, next) => {
res.send('Hello, World!');
});
app.listen(port, () => {
console.log('listening to port', port);
});
For the very first time, it works fine. But since then, when I run node index.js which contains the webservice mentioned above, I receive the error posted below.
To solve this issue I ran the following command:
npx kill-port 3000
but that did not solve the problem.
Please let me know if there is another way to solve this issue.
Note: I tried to use several other ports numbers, but I receive the same error message with the new port number indicated in the error message.
Error:
node:events:489
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE: address already in use :::3000
答案1
得分: 1
看起来端口3000已被另一个进程使用。
如果你使用Linux作为操作系统：
- 要查看正在监听的端口列表
ss -ntlp
# 或者
netstat -ntlp
- 要特定检查端口3000
netstat -ntlp | grep ':3000'
接下来，终止使用该端口的进程（首先要检查它是什么）。
kill <PID>
kill -9 <PID> # 如果kill命令不起作用
如果你使用Windows或macOS，也有相应的方法来列出正在监听的端口并终止使用所需端口的进程。
Windows：
netstat -ano | findstr :3000
taskkill /PID <PID> /F
macOS：
lsof -ti:3000
kill <PID>
kill -9 <PID> # 如果kill命令不起作用
英文:
It seems that port 3000 is already in use by another process.
If you use Linux as OS:
- For a list of listening ports
ss -ntlp
# or
netstat -ntlp
- To check specifically for port 3000
netstat -ntlp | grep ':3000'
Next, kill the process using the port (check what it is first).
kill <PID>
kill -9 <PID> # if kill does not work
If you're using Windows or macOS, there's an equivalent way to list listening ports and kill the process using the desired port.
Windows :
netstat -ano | findstr :3000
taskkill /PID <PID> /F
MacOS:
lsof -ti:3000
kill <PID>
kill -9 <PID> # if kill does not work
答案2
得分: 1
从任务管理器中结束该进程。
答案3
得分: 0
正如您提到的，第一次运行正常，然后第二次开始出错。
这与您停止应用程序的方式有关，如果您使用Ctrl + Z（或在Mac上使用cmd + Z），应用程序将在终端上停止，但进程不会被终止。
正确的方式是Ctrl + C（或在Mac上使用cmd + C），它将发送SIGINT信号，将终止应用程序。
英文:
As you mentioned, the very first time is works fine & then it throws an error second time onwards.
It has to do with the way you are stopping the application if your doing Ctrl + Z (or cmd + Z on Mac) the app will be stopped on terminal but the process won't be killed.
The correct way is Ctrl + C (or cmd + C on Mac), it will send SIGINT which will kill the application.
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