win10服务启动后停止（由AlwaysUp创建的python脚本）

我正试图在我的pc上建立一个mqtt客户机，所以我开始用python编写一个脚本。当我从pythonidle运行脚本时，它工作良好且稳定。我下载了AlwaysUp并创建了一个服务。当我运行服务时，它会在5秒后停止

import paho.mqtt.client as mqtt #import the client1
import time
import os
strshtdwn=0
def on_log(clint, userdata,level, buf):
       print("log: "+buf)
def on_connect(client,userdata, flags ,rc):
    if rc==0:
        print("Connected OK")
    else:
        print("Bad connection Returned code=",rc)
def on_disconnect(client, userdata, flags, rc=9):
        print("DisConnected result code "+str(rc))
def on_message(clinet, userdata, msg):
    topic=msg.topic
    m_decode=str(msg.payload.decode("utf-8","ignore"))
    if  m_decode=="SHUTDOWN":
        os.system("shutdown /p")
        client.publish("stat/hwa_rang_pc/POWER","Shuting Down")
    elif m_decode=="RESTART":
        os.system("shutdown /r")
        client.publish("stat/hwa_rang_pc/POWER","Restarting")
    elif m_decode=="LOGOFF":
        os.system("shutdown /l")
        client.publish("stat/hwa_rang_pc/POWER","Logging OFF")
        print("message received: ",m_decode)  
        print("strshtdwn",strshtdwn)
broker="192.168.1.3"
client = mqtt.Client("Hwa_Rang_PC") #create new instance
client.on_connect=on_connect
client.on_disconnect=on_disconnect
#client.on_log=on_log
client.on_message=on_message              
print("Connecting to broker ",broker)
client.connect(broker) #connect to broker
client.loop_start()
client.subscribe("cmnd/hwa_rang_pc/power")
client.publish("stat/hwa_rang_pc/POWER","OFF")
#client.loop_stop()
#client.disconnect() #disconnect

事件查看器一次出错3次。两个ID为“2”，一个ID为“7023”。

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帮助plz

我正在使用pirmasoft的runassvc为python脚本生成windows服务

以下是必填字段：

Path to exe: c:\python\pythonw.exe
Parameter: c:\python\pythonscript.py
Working folder: c:\python\

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runassvc没有任何问题。错误消息“本地计算机上的mqtt_commands1服务已启动，然后停止。如果其他服务或程序未使用，则某些服务会自动停止”