Using PubNub to publish message in Django view : Forums : PythonAnywhere

I want to use PubNub to publish a message from a Django view. It seems to work fine at first, but if I refresh the page a few times in succession, I eventually catch a RuntimeError exception with the message "can't start new thread". If I wait a bit (I'm not sure how long), it resumes working again, and then repeats the same behavior.

Here's my code for my view:

def court_assignments(request):
    try:
        pnconfig = PNConfiguration()

        pnconfig.subscribe_key = '<sub key>'
        pnconfig.publish_key = '<pub key>'
        pnconfig.ssl = False

        pubnub = PubNub(pnconfig)
        pubnub.publish().channel('MyDemoChannel').message({"text": "My test message."}).sync()
    except:
        logger.exception("Caught exception in my_view()")
             .
             .
             .

And the stack trace:

[25/Aug/2018 23:00:28] ERROR [league.views:104] Caught exception in court_assignments()
Traceback (most recent call last):
  File "/home/tennis/tennis.pythonanywhere.com/website/league/views.py", line 98, in court_assignments
    pubnub = PubNub(pnconfig)
  File "/home/tennis/.virtualenvs/tennis.pythonanywhere.com/lib/python3.6/site-packages/pubnub/pubnub.py", line 36, in __init__
    self._subscription_manager = NativeSubscriptionManager(self)
  File "/home/tennis/.virtualenvs/tennis.pythonanywhere.com/lib/python3.6/site-packages/pubnub/pubnub.py", line 164, in __init__
    self._start_worker()
  File "/home/tennis/.virtualenvs/tennis.pythonanywhere.com/lib/python3.6/site-packages/pubnub/pubnub.py", line 258, in _start_worker
    self._consumer_thread.start()
  File "/usr/lib/python3.6/threading.py", line 846, in start
    _start_new_thread(self._bootstrap, ())
RuntimeError: can't start new thread

Is there something I'm doing incorrectly?

Thanks, Mike

deleted-user-3516204 | 2 posts | Aug. 26, 2018, 4:50 a.m. | permalink