Problem applying migration in Openwisp-controller

[Suman Das]

First, Hello and Greetings to all,

I'm customizing the OpenWisp controller and then When I'm applying Migration ,it keeps hanging and it is happening due to openwisp-notifications. If I press ctrl+c it is showing this error:

^CTraceback (most recent call last):
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/utils/functional.py", line 43, in __call__
    return self.__value__
AttributeError: 'ChannelPromise' object has no attribute '__value__'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/amqp/transport.py", line 137, in _connect
    entries = socket.getaddrinfo(
  File "/usr/lib/python3.8/socket.py", line 918, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -9] Address family for hostname not supported

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/utils/functional.py", line 344, in retry_over_time
    return fun(*args, **kwargs)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/connection.py", line 874, in _connection_factory
    self._connection = self._establish_connection()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/connection.py", line 809, in _establish_connection
    conn = self.transport.establish_connection()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/transport/pyamqp.py", line 130, in establish_connection
    conn.connect()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/amqp/connection.py", line 314, in connect
    self.transport.connect()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/amqp/transport.py", line 78, in connect
    self._connect(self.host, self.port, self.connect_timeout)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/amqp/transport.py", line 146, in _connect
    raise (e
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/amqp/transport.py", line 162, in _connect
    self.sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 29, in <module>
    execute_from_command_line(sys.argv)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/core/management/__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/core/management/base.py", line 330, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/core/management/base.py", line 371, in execute
    output = self.handle(*args, **options)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/core/management/base.py", line 85, in wrapped
    res = handle_func(*args, **kwargs)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 267, in handle
    emit_post_migrate_signal(
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/core/management/sql.py", line 48, in emit_post_migrate_signal
    models.signals.post_migrate.send(
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/dispatch/dispatcher.py", line 177, in send
    return [
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/django/dispatch/dispatcher.py", line 178, in <listcomp>
    (receiver, receiver(signal=self, sender=sender, **named))
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/openwisp_notifications/handlers.py", line 259, in notification_type_registered_unregistered_handler
    tasks.ns_register_unregister_notification_type.delay()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/celery/app/task.py", line 426, in delay
    return self.apply_async(args, kwargs)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/celery/app/task.py", line 566, in apply_async
    return app.send_task(
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/celery/app/base.py", line 741, in send_task
    amqp.send_task_message(P, name, message, **options)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/celery/app/amqp.py", line 552, in send_task_message
    ret = producer.publish(
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/messaging.py", line 178, in publish
    return _publish(
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/connection.py", line 533, in _ensured
    return fun(*args, **kwargs)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/messaging.py", line 187, in _publish
    channel = self.channel
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/messaging.py", line 209, in _get_channel
    channel = self._channel = channel()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/utils/functional.py", line 45, in __call__
    value = self.__value__ = self.__contract__()
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/messaging.py", line 224, in <lambda>
    channel = ChannelPromise(lambda: connection.default_channel)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/connection.py", line 892, in default_channel
    self._ensure_connection(**conn_opts)
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/connection.py", line 441, in _ensure_connection
    return retry_over_time(
  File "/home/dell/cosgrid/openwisp2/env/lib/python3.8/site-packages/kombu/utils/functional.py", line 358, in retry_over_time
    sleep(1.0)
KeyboardInterrupt

[Federico Capoano]

I think we had a similar issue and we had to use a workaround, pease read https://github.com/openwisp/openwisp-notifications/issues/142.

Best regards

Federico Capoano

OpenWISP OÜ

Harjumaa, Tallinn, Sepapaja tn 6, 15551

VAT: EE101989729

openwisp.io

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