Exception ignored in: about aiocoap HOT 5 CLOSED

import logging
import asyncio
import struct
from aiocoap import *

logging.basicConfig(level=logging.INFO)

node_id = "1"
control_prefix = "fd00:c:"
node_interface_address = "::2"
NodeControlAddress = control_prefix + node_id + node_interface_address

@asyncio.coroutine
def main():
    protocol = yield from Context.create_client_context()

    payload = bytearray()
    payload.append(0)  # connector id
    payload.append(1)  # function id
    payload.append(1)  # num_of_args
    payload.extend(struct.pack("<H", 1000))

    print(repr((payload)))

    request = Message(code=POST, payload=payload, uri='coap://['+NodeControlAddress+']/wishful_funcs')

    try:
        response = yield from protocol.request(request).response
    except Exception as e:
        print('Failed to fetch resource:')
        print(e)
    else:
        print('Result: %s\n%r' % (response.code, response.payload))

    protocol.shutdown()

if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())
    print(asyncio.Task.all_tasks(loop=loop))
    loop.close()

if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    print('Running main')
    try:
        loop.run_until_complete(main())
    except Exception:
        print(e)
    print('Tasks:')
    print(asyncio.Task.all_tasks(loop=loop))
    print('Closing loop')
    loop.close()