def validate(self):
        if not self.fname:
            return
        try:
            with open(self.fname, "r") as f:
                wpid = int(f.read() or 0)

                if wpid <= 0:
                    return

                try:
                    os.kill(wpid, 0)
                    return wpid
                except OSError, e:
                    if e[0] == errno.ESRCH:
                        return
                    raise
        except IOError, e:
            if e[0] == errno.ENOENT:
                return
            raise
Method to verify if the Policy Management Service is running in the system. If the container cannot connect to
dataset/ETHPy150Open benoitc/tproxy/tproxy/pidfile.py/Pidfile.validate--crossover with--dataset/ETHPy150Open ooici/pyon/pyon/core/governance/governance_controller.py/GovernanceController._is_policy_management_service_available