python-Gunicorn在Flask App上不断重启/中断

2024-03-29 15:56:28

我有一个Flask应用,正在尝试过渡到通过gunicorn运行.我遇到了很多问题.这是我的应用程序的运行代码：

app.run(host=HOST, port=PORT, debug=DEBUG_FLAG)

首先,如果DEBUG_FLAG == true,则该应用程序将永远不会真正启动,而只会继续重新启动,并且在本地运行该应用程序将无法工作.它只是一遍又一遍地这样做：

gunicorn analytics_service:app                                                                                                                         
 * Running on http://127.0.0.1:5000/
 * Restarting with reloader
 * Running on http://127.0.0.1:5000/
 * Restarting with reloader
 * Running on http://127.0.0.1:5000/
 * Restarting with reloader

如果我使用DEBUG_FLAG == False来启动它,它实际上会启动并处理一些请求,但由于未知原因仍会频繁中断并重新启动：

gunicorn analytics_service:app                                                                                                                         (env: BigQueryTest)
 * Running on http://127.0.0.1:5000/
127.0.0.1 - - [28/Aug/2014 08:59:05] "GET /metrics/ctr?location=blah&start_date=2014-05-21&end_date=2014-06-01 HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2014 08:59:15] "GET /metrics/ctr?location=blah&start_date=2014-05-21&end_date=2014-06-05 HTTP/1.1" 200 -
----------------------------------------
Exception happened during processing of request from ('127.0.0.1', 64693)
Traceback (most recent call last):
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock
    self.process_request(request, client_address)
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 321, in process_request
    self.finish_request(request, client_address)
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 334, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 649, in __init__
    self.handle()
  File "/Users/Eli/.virtualenvs/BigQueryTest/lib/python2.7/site-packages/werkzeug/serving.py", line 200, in handle
    rv = BaseHTTPRequestHandler.handle(self)
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/BaseHTTPServer.py", line 340, in handle
    self.handle_one_request()
  File "/Users/Eli/.virtualenvs/BigQueryTest/lib/python2.7/site-packages/werkzeug/serving.py", line 231, in handle_one_request
    self.raw_requestline = self.rfile.readline()
  File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 447, in readline
    data = self._sock.recv(self._rbufsize)
  File "/Users/Eli/.virtualenvs/BigQueryTest/lib/python2.7/site-packages/gunicorn/workers/base.py", line 154, in handle_abort
    sys.exit(1)
SystemExit: 1
----------------------------------------
 * Running on http://127.0.0.1:5000/
 * Running on http://127.0.0.1:5000/
 * Running on http://127.0.0.1:5000/
 * Running on http://127.0.0.1:5000/
 * Running on http://127.0.0.1:5000/

如前所述,如果我通过Flask的本机服务器运行一切正常.问题只出现在金枪鱼上.救命？

解决方法:

我怀疑您的问题是您正在调用app.run().

app.run()函数启动Flask的开发Web服务器.当您使用Flask以外的Web服务器时,不必调用此功能,您的Web服务器(本例中为gunicorn)将有其自己的启动方式.

通常,app.run()行位于if __name__ ==’__main__’内部：有条件的(请参见Flask官方文档中的示例),因此仅当您直接执行脚本时才运行它,例如pythonrun.py.我建议您将其添加到run.py脚本并重新测试.如果还有其他问题,请描述.

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