Handle sys.exit() in cherrypy service

When you start/stop a python cherrypy service (compiled with py2exe), this works fine When I get a sys.exit() call (from my error handler), cherrypy quits, but the service remains hanging.


import cherrypy
import win32serviceutil
import win32service
import sys


class HelloWorld:
    """ Sample request handler class. """

    def __init__(self):
        self.iVal = 0

    def index(self):
        self.iVal += 1 
        if self.iVal == 5:
        return "Hello world! " + str(self.iVal) 

class MyService(win32serviceutil.ServiceFramework):
    """NT Service."""

    _svc_name_ = "CherryPyService"
    _svc_display_name_ = "CherryPy Service"
    _svc_description_ = "Some description for this service"

    def SvcDoRun(self):
        SERVICE = self

    def SvcStop(self):

def StartService():

    cherrypy.tree.mount(HelloWorld(), '/')

            'tools.log_tracebacks.on': True,
            'log.error_file': '\\Error_File.txt',
            'log.screen': True,
            'engine.autoreload.on': False,
            'engine.SIGHUP': None,
            'engine.SIGTERM': None


def StopService(classObject):

if __name__ == '__main__':
    print sys.argv

Any advice would be great :)

Asked by: Vivian490 | Posted: 06-12-2021

Answer 1

I'm not entirely sure where the sys.exit call is coming from or what your preferred behavior is. When sys.exit is called, however, it raises a SystemExit exception. You can intercept this and continue on your way:

import sys
except SystemExit:
    print "Somebody called sys.exit()."
print "Still running."

... or use finally to do some cleanup:


Answered by: Sophia373 | Posted: 07-01-2022

Answer 2

stopping a cherrypy server over http recommends cherrypy.engine.exit() instead of sys.exit().

Answered by: Maddie593 | Posted: 07-01-2022

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