linux - Python daemon doesnt spawn at times -

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i have daemon in python spawn using daemonrunner api(a pid file , lock file created). pid file , lock file deleted when daemon stopped.

the start/stop works fine except daemon doesn't start. need delete entire folder had pid file up. how debug this? there auto-generated file name host.mainthread-pid. significance of this?

here's class start/stop daemon 

class myrunner(daemonrunner):     def __init__(self,appl):         self.appl = appl         daemonrunner.__init__(self,appl)      def start(self):         // check if pid file exists..         retval =daemonrunner.start(self)         return retval      def stop(self):         return daemonrunner.stop(self)

strace looks similar both successful , unsuccessful usecases.


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