试图运行Flask应用程序给出“地址已经在使用” [英] Trying to run Flask app gives "Address already in use"
问题描述
追溯(最近的最后一次调用):
文件/ home / ubuntu / workspace / app.py,第11行,在< module>
app.run(host = os.getenv('IP','0.0.0.0'),port = int(os.getenv('PORT',8080)))
文件/ usr / local / lib / python2.7 / dist-packages / flask / app.py,第772行,运行
run_simple(host,port,self,** options)
文件/ usr / local /lib/python2.7/dist-packages/werkzeug/serving.py,第687行,在run_simple中
inner()
文件/usr/local/lib/python2.7/dist-packages /werkzeug/serving.py,第653行,内部
fd = fd).serve_forever()
文件/usr/local/lib/python2.7/dist-packages/werkzeug/serving。 py,第557行,在make_server
passthrough_errors,ssl_context,fd = fd)
文件/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py,第467行,在__init__
HTTPServer .__ init __(self,(host,int(port)),handler)
在__init__ $文件/usr/lib/python2.7/SocketServer.py,行419 b $ b self.server_bind()
文件/usr/lib/python2.7/BaseHTTPServer.py,第108行,在server_bind中
SocketServer.TCPServer.server_bind(s elf)
文件/usr/lib/python2.7/SocketServer.py,第430行,在server_bind中
self.socket.bind(self.server_address)
文件/ usr / (self._sock,name)(* args)
socket.error:[Errno 98]地址已经在使用了$ lib $ python2.7 / socket.py,第224行,在meth
返回getattr b $ b
这意味着有另一个服务使用该端口( 8080
在这种情况下)。也许是因为你忘了关闭另一个正在运行的Flask应用程序,它使用 8080
port。
但是,你正在使用,例如把它改为 4444
就像这样:
if __name __ ==__ main__:
app.run(host = os.getenv('IP','0.0.0.0'),
port = int(os.getenv('PORT', 4444)))
但是无论如何,我想你想知道哪个程序正在使用该部分如果这不是你的程序。您可以使用 nmap
或 netcat
GNU程序检查它。
$ sudo netstat -nlp | grep 8080
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 125004 / nginx
<当你得到它,我建议手动停止它(例如,如果它是 nginx
或其他HTTP服务器,然后停止它通过服务
命令或 systemctl
如果您使用的是systemd Linux)
您也可以杀死它通过命令 kill
:
kill< pid>
您也可以通过 killall
pkill
,它使用进程名称而不是它的pid:
$ $ p $ killall / pkill<进程名称>
I recently updated my app and tried to run it, and got the following error about "Address already in use". What does this mean and how do I fix it?
Traceback (most recent call last):
File "/home/ubuntu/workspace/app.py", line 11, in <module>
app.run(host = os.getenv('IP', '0.0.0.0'), port=int(os.getenv('PORT',8080)))
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 772, in run
run_simple(host, port, self, **options)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 687, in run_simple
inner()
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 653, in inner
fd=fd).serve_forever()
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 557, in make_server
passthrough_errors, ssl_context, fd=fd)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 467, in __init__
HTTPServer.__init__(self, (host, int(port)), handler)
File "/usr/lib/python2.7/SocketServer.py", line 419, in __init__
self.server_bind()
File "/usr/lib/python2.7/BaseHTTPServer.py", line 108, in server_bind
SocketServer.TCPServer.server_bind(self)
File "/usr/lib/python2.7/SocketServer.py", line 430, in server_bind
self.socket.bind(self.server_address)
File "/usr/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use
It means there's another service's using that port (8080
in this case). Maybe because you forgot close another running Flask app and it's using 8080
port.
However, you could change the port you're using, for example change it to 4444
like this:
if __name__=="__main__":
app.run(host=os.getenv('IP', '0.0.0.0'),
port=int(os.getenv('PORT', 4444)))
But anyways, I think you'd like to know which program is using that part if it's not your program. You could use nmap
or netcat
GNU program to check it.
Here's the netcat
way (from here):
$ sudo netstat -nlp | grep 8080
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 125004/nginx
When you got it, I'd suggest stop it manually (for example if it's nginx
or other HTTP servers, then stop it via service
command or systemctl
if you're using systemd Linux)
You can also kill it via command kill
:
kill <pid>
You can also kill it via killall
or pkill
, it use a process name instead of it's pid:
killall/pkill <process name>
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