Do you have solution for this? I'm facing the exact same issue.

Facing same issue when ever run cron job auto, but manually it works.

ERROR ? odoo.service.server: Worker WorkerCron (593084) Exception occurred, exiting... 

Traceback (most recent call last):

  File "/opt/odoo/odoo/service/server.py", line 1127, in _runloop

    self.process_work()

  File "/opt/odoo/odoo/service/server.py", line 1226, in process_work

    base.models.ir_cron.ir_cron._process_jobs(db_name)

AttributeError: module 'odoo.models' has no attribute 'ir_cron'

Hi,

Suppose you're experiencing issues with your custom cron job in Odoo, intermittently failing with an attribute error, causing problems with server actions. In that case, you can follow these steps to troubleshoot and resolve the issue:

1. Check the implementation of the cron job.

2. Inspect server logs for error messages related to the cron job.

3. Review the server action configuration that triggers the cron job.

4. Check for database integrity issues.

5. Review server configuration.

6. Check for resource constraints.

7. Upgrade or patch Odoo to ensure you're using the latest version.

8. Test and debug your cron job in a development environment.

By following these steps, you should be able to diagnose and resolve the attribute error affecting your custom cron job.

Hope it helps