Django-Redis DataError Invalid type 'CacheKey'

[arky]

Steps to reproduce:

Pootle Linux development environment setup fails at 'pootle migrate' step with "redis.exceptions.DataError: Invalid input of type: 'CacheKey'. Convert to a byte, string or number first" error.

Results (Expected/Actual):

Traceback (most recent call last):
  File "/home/arky/.venvs/pootle_test/bin/pootle", line 11, in <module>
    load_entry_point('Pootle', 'console_scripts', 'pootle')()
  File "/home/arky/Code/Django/pootle/pootle/runner.py", line 365, in main
    run_app(project='pootle', django_settings_module='pootle.settings')
  File "/home/arky/Code/Django/pootle/pootle/runner.py", line 320, in run_app
    caches = settings.CACHES.keys()
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/conf/__init__.py", line 56, in __getattr__
    self._setup(name)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/conf/__init__.py", line 41, in _setup
    self._wrapped = Settings(settings_module)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/conf/__init__.py", line 129, in __init__
    raise ImproperlyConfigured("The SECRET_KEY setting must not be empty.")
django.core.exceptions.ImproperlyConfigured: The SECRET_KEY setting must not be empty.
(pootle_test) arky@Think:~/Code/Django/pootle$ pootle init 
File already exists at '/home/arky/.venvs/pootle_test/pootle.conf', overwrite? [Ny] n
2019-01-27 16:07:56,478 ERROR File already exists, not overwriting.
(pootle_test) arky@Think:~/Code/Django/pootle$ nano ~/.venvs/pootle_test/pootle.conf 
(pootle_test) arky@Think:~/Code/Django/pootle$ pootle migrate
Traceback (most recent call last):
  File "/home/arky/.venvs/pootle_test/bin/pootle", line 11, in <module>
    load_entry_point('Pootle', 'console_scripts', 'pootle')()
  File "/home/arky/Code/Django/pootle/pootle/runner.py", line 365, in main
    run_app(project='pootle', django_settings_module='pootle.settings')
  File "/home/arky/Code/Django/pootle/pootle/runner.py", line 346, in run_app
    management.execute_from_command_line(command)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/management/base.py", line 327, in execute
    self.check()
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/management/base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 62, in _run_checks
    issues.extend(super(Command, self)._run_checks(**kwargs))
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/management/base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/arky/Code/Django/pootle/pootle/checks.py", line 478, in check_revision
    revision = Revision.get()
  File "/home/arky/Code/Django/pootle/pootle/core/models/revision.py", line 45, in get
    return cache.get(cls.CACHE_KEY)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django_redis/cache.py", line 32, in _decorator
    return method(self, *args, **kwargs)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django_redis/cache.py", line 81, in get
    client=client)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/django_redis/client/default.py", line 202, in get
    value = client.get(key)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/redis/client.py", line 1207, in get
    return self.execute_command('GET', name)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/redis/client.py", line 754, in execute_command
    connection.send_command(*args)
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/redis/connection.py", line 619, in send_command
    self.send_packed_command(self.pack_command(*args))
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/redis/connection.py", line 659, in pack_command
    for arg in imap(self.encoder.encode, args):
  File "/home/arky/.venvs/pootle_test/local/lib/python2.7/site-packages/redis/connection.py", line 124, in encode
    "byte, string or number first." % typename)
redis.exceptions.DataError: Invalid input of type: 'CacheKey'. Convert to a byte, string or number first.

Environment (i.e. 'pootle --version', DB, OS, Browser):

$ pootle --version
Pootle 2.9.0rc1 [187ecc9] (Django 1.11.18, Translate Toolkit 2.3.0)

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.10
Release: 18.10
Codename: cosmic

$ pip show redis
Name: redis
Version: 3.0.1
Summary: Python client for Redis key-value store
Home-page: https://github.com/andymccurdy/redis-py
Author: Andy McCurdy
Author-email: [email protected]
License: MIT
Location: /home/arky/.venvs/pootle_test/lib/python2.7/site-packages
Requires:
Required-by: rq, django-redis
(pootle_test) arky@Think:~/Code/Django/pootle/requirements$ pip install redis==2.10.6

Workaround

You could either downgrade your redis to (pip install redis==2.10.6) or upgrade django-redis (pip install django-redis==4.10.0)