Subprocess 丟出 exception 導致程式整個 halt 住

[vava24680]

• 問題描述：當一開始 sa.py 中的 endpoint 打錯導致 requests 無法正常將 request 送到 EC 時，subprocess 會拋出 exception 但整個程式並不會中止而是 halt 住，需要多按一次 CTRL-C 才能終止
• 執行環境：
  • OS: Debian 10
  • Python: CPython 3.7.3
  • iottalk-py version: 2.3.0
  • SA file which can re-produce the siuation:

    import random
    
    from iottalkpy.dan import NoData
    
    ### The registeration api url, you can use IP or Domain.
    # api_url = 'https://iottalk2.tw/csm'  # default
    api_url = 'http://GG/csm'  # with URL prefix
    # api_url = 'http://localhost:9992/csm'  # with URL prefix + port
    
    ### [OPTIONAL] If not given or None, server will auto-generate.
    device_name = 'Dummy_Test'
    
    ### [OPTIONAL] If not given or None, DAN will register using a random UUID.
    ### Or you can use following code to use MAC address for device_addr.
    from uuid import getnode
    # device_addr = "{:012X}".format(getnode())
    # device_addr = "..."
    
    ### [OPTIONAL] If the device_addr is set as a fixed value, user can enable
    ### this option and make the DA register/deregister without rebinding on GUI
    # persistent_binding = True
    
    ### [OPTIONAL] If not given or None, this device will be used by anyone.
    # username = 'myname'
    
    ### The Device Model in IoTtalk, please check IoTtalk document.
    device_model = 'Dummy_Device'
    
    ### The input/output device features, please check IoTtalk document.
    idf_list = ['Dummy_Sensor']
    odf_list = ['Dummy_Control']
    
    ### Set the push interval, default = 1 (sec)
    ### Or you can set to 0, and control in your feature input function.
    push_interval = 10  # global interval
    interval = {
        'Dummy_Sensor': 3,  # assign feature interval
    }
    
    
    def on_register(self):
        print('Register successfully')
    
    
    def Dummy_Sensor():
        return random.randint(0, 100)
    
        # Or you want to return nothing.
        # Note that the object `None` is treated as normal data in IoTtalk
        #
        # return NoData
    
    
    def Dummy_Control(data):  # data is a list
        print(str(data[0]))

[iblislin]

這個問題也太詭異了吧

[vava24680]

會發生的原因是目前的做法 master process 會 catch KeyboardInterrupt，但 child process 丟出 exception 終止時 master process 完全不知道，所以就 halt 住了