Error "can't pickle module objects" using redis storage and schedule

[enver]

I've created new project and scheduled couple of actions. Using memory storage everything works as expected, however when I switch to redis bot can't start due to:

Traceback (most recent call last):
  File "slack-bot/.py3/bin/slack-machine", line 10, in <module>
    sys.exit(main())
  File "slack-bot/.py3/lib/python3.7/site-packages/machine/bin/run.py", line 14, in main
    bot.run()
  File "slack-bot/.py3/lib/python3.7/site-packages/machine/core.py", line 195, in run
    Scheduler.get_instance().start()
  File "slack-bot/.py3/lib/python3.7/site-packages/apscheduler/schedulers/background.py", line 33, in start
    BaseScheduler.start(self, *args, **kwargs)
  File "slack-bot/.py3/lib/python3.7/site-packages/apscheduler/schedulers/base.py", line 162, in start
    self._real_add_job(job, jobstore_alias, replace_existing)
  File "slack-bot/.py3/lib/python3.7/site-packages/apscheduler/schedulers/base.py", line 867, in _real_add_job
    store.add_job(job)
  File "slack-bot/.py3/lib/python3.7/site-packages/apscheduler/jobstores/redis.py", line 82, in add_job
    self.pickle_protocol))
TypeError: can't pickle module objects

[DonDebonair]

I'm sorry to hear you're having problems. But without seeing some code of your plugin(s), it's hard to see what's going wrong. Can you share the code of the scheduled actions?

[davidolrik]

I too, have this problem, and I can recreate it with almost an empty plugin and Redis selected as storage backend.

from machine.plugins.base import MachineBasePlugin
from machine.plugins.decorators import listen_to, respond_to, schedule

class MyFancyPlugin(MachineBasePlugin):

    @schedule(hour='7-16', minute='*/5')
    def do_stuff(self):
        pass

When starting slack-machine, it errors out with this error:

[2020-01-07 14:48:33][DEBUG] root server.py:connect_slack_websocket:196 | RTM connected
    ✓ Connected to Slack
Traceback (most recent call last):
File "/Users/me/Library/Caches/pypoetry/virtualenvs/my-bot-KXQlIt-n-py3.8/bin/slack-machine", line 10, in <module>
    sys.exit(main())
File "/Users/me/Library/Caches/pypoetry/virtualenvs/my-bot-KXQlIt-n-py3.8/lib/python3.8/site-packages/machine/bin/run.py", line 14, in main
    bot.run()
File "/Users/me/Library/Caches/pypoetry/virtualenvs/my-bot-KXQlIt-n-py3.8/lib/python3.8/site-packages/machine/core.py", line 195, in run
    Scheduler.get_instance().start()
File "/Users/me/Library/Caches/pypoetry/virtualenvs/my-bot-KXQlIt-n-py3.8/lib/python3.8/site-packages/apscheduler/schedulers/background.py", line 33, in start
    BaseScheduler.start(self, *args, **kwargs)
File "/Users/me/Library/Caches/pypoetry/virtualenvs/my-bot-KXQlIt-n-py3.8/lib/python3.8/site-packages/apscheduler/schedulers/base.py", line 162, in start
    self._real_add_job(job, jobstore_alias, replace_existing)
File "/Users/me/Library/Caches/pypoetry/virtualenvs/my-bot-KXQlIt-n-py3.8/lib/python3.8/site-packages/apscheduler/schedulers/base.py", line 867, in _real_add_job
    store.add_job(job)
File "/Users/me/Library/Caches/pypoetry/virtualenvs/my-bot-KXQlIt-n-py3.8/lib/python3.8/site-packages/apscheduler/jobstores/redis.py", line 81, in add_job
    pipe.hset(self.jobs_key, job.id, pickle.dumps(job.__getstate__(),
TypeError: cannot pickle 'module' object

[davidolrik]

I think I have found the reason for the error above.

I'm importing yaml into local_settings.py and this isn't allowed as this will make local_settings.py unpicleable.

@enver Are you by any chance importing stuff in local_settings.py?

[enver]

@davidolrik Yes, I do. Thanks for the hint, I'll try it out.