[node] the service port is occupied error: listen eaddinuse: address already in use::: 9000- how to close the port started by node

Problem description

Record once node Problems encountered during project startup ：koa2 After starting the project , Use ctrl+c Abort the code , But when running again, the sending port is occupied .
The error information is as follows ：

Error: listen EADDRINUSE: address already in use :::9000

terms of settlement

The solution is to 9000 The program running on the port is killed .

1. function cmd:

【win】+ r ( function )--> cmd

2. Go to the specified directory

cmd Input in

cd c:\Windows\System32

3. You can view all ports to get PID

netstat -ano

4. You can also use the port to accurately locate and obtain PID

More convenient

netstat -ano|findstr  9000

Get the last column PID, here pid by 11588

5. Kill the running program

taskkill /pid 11588

If the execution must be forcibly terminated , add to /F Options

taskkill /F /pid 11588

6. Rerun

Run the program again, and the port occupation will not be displayed