Question

Below is the code I am running within a service. For the most part the script runs fine for days/weeks until the script hiccups and crashes. I am not so worried about the crashing part as I can resolve the cause from the error logs an patch appropriately. The issue I am facing is that sometimes when the service restarts and tries to connect to the server again, it gets a (10061, 'Connection refused') error, so that the service is unable to start up again. The bizarre part is that there is no python processes running when connections are being refused. IE no process with image name “pythonw.exe” or “pythonservice.exe.” It should be noted that I am unable to connect to the server with any other machine as well until I reset computer which runs the client script. The client machine is running python 2.7 on a windows server 2003 OS. It should also be noted that the server is coded on a piece of hardware of which I do not have access to the code.

try:            
        EthernetConfig = ConfigParser()
        EthernetConfig.read('Ethernet.conf')

        HOST = EthernetConfig.get("TCP_SERVER", "HOST").strip()
        PORT = EthernetConfig.getint("TCP_SERVER", "PORT")

        lp = LineParser()
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        s.connect((HOST, PORT))
        reader = s.makefile("rb")

        while(self.run == True):

            line = reader.readline()
            if line:
                line = line.strip()
                lp.parse(line)
except:

        servicemanager.LogErrorMsg(traceback.format_exc()) # if error print it to event log
        s.shutdown(2)
        s.close()
        os._exit(-1)

Answer 1

Turns out that Network Admin had the port closed that I was trying to connect to. It is open for one IP which belongs to the server. Problem is that the server has two network cards with two separate IP’s. Issue is now resolved.