deferred "Attempted RPC call without active security ticket" error

[ZachOrr]

Expected Behavior

Enqueuing a deferred task

Actual Behavior

Attempting to enqueue a deferred task throws an error due to a missing security ticket.

Stack trace:

Traceback (most recent call last):
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/flask/app.py", line 2073, in wsgi_app
    response = self.full_dispatch_request()
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/flask/app.py", line 1518, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/flask/app.py", line 1516, in full_dispatch_request
    rv = self.dispatch_request()
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/flask/app.py", line 1502, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
  File "/workspace/backend/tasks_io/main.py", line 24, in test
    deferred.defer(do_the_thing)
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/ext/deferred/deferred.py", line 305, in defer
    return task.add(queue, transactional=transactional)
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/api/taskqueue/taskqueue.py", line 1292, in add
    return self.add_async(queue_name, transactional).get_result()
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/api/taskqueue/taskqueue.py", line 1288, in add_async
    return Queue(queue_name).add_async(self, transactional, rpc)
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/api/taskqueue/taskqueue.py", line 2139, in add_async
    return self.__AddTasks(tasks,
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/api/taskqueue/taskqueue.py", line 2278, in __AddTasks
    return _MakeAsyncCall('BulkAdd',
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/api/taskqueue/taskqueue.py", line 488, in _MakeAsyncCall
    rpc.make_call(method, request, response, get_result_hook, None)
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/api/apiproxy_stub_map.py", line 565, in make_call
    self.__rpc.MakeCall(self.__service, method, request, response)
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/api/apiproxy_rpc.py", line 133, in MakeCall
    self._MakeCallImpl()
  File "/layers/google.python.pip/pip/lib/python3.8/site-packages/google/appengine/runtime/default_api_stub.py", line 173, in _MakeCallImpl
    raise apiproxy_errors.RPCFailedError(
google.appengine.runtime.apiproxy_errors.RPCFailedError: Attempted RPC call without active security ticket

Steps to Reproduce the Problem

1. Create a base Flask app with use_deferred=True

main.py

from flask import Flask
from google.appengine.api import wrap_wsgi_app

app = Flask(__name__)
app.wsgi_app = wrap_wsgi_app(app.wsgi_app, use_legacy_context_mode=False, use_deferred=True)


def do_the_thing():
    print(f"We did the thing")


@app.route('/')
def index():
    from google.appengine.ext import deferred

    deferred.defer(do_the_thing)

app.yaml

runtime: python38
entrypoint: gunicorn -b :$PORT main:app
app_engine_apis: true

handlers:
  - url: /.*
    script: auto

2. Run the app

$ dev_appserver.py --runtime_python_path=$(which python3) app.yaml

3. Navigate to http://localhost:8080/ in a browser - observe the error

Specifications

• Version: v0.3.1
• Platform: Ubuntu 20.04.3 (also replicated on an upstream GAE deploy)

[asriniva]

At the moment the use_legacy_context_mode=True option is the only mode supported for the SDK. The newer context mode is being worked on but is not yet compatible with the Taskqueue API.

[firerabbit]

I get this error locally with memcache and datastore as well, which use_legacy_context_mode=True and False and use_deferred=True and False. If I push this up to appengine the memcache read/write succeeds

[asriniva]

Unless you're running devappserver or otherwise stubbing out the memcache/datastore services, the calls will not succeed locally. These App Engine services are not accessible outside the App Engine environment.

[hassan-arrivy]

@asriniva I'm running devappserver locally but these services still don't work. I'm using python38 with latest version of Django. We're in the migration process.