Symfony doesn't create logs in production environment

问题

I'm having yet another weird case where Symfony 3.3 doesn't produce logs in production environment. My main config has following monolog section:

monolog:
  channels:
    - job.execution
    - job.clean-up
    - job.notification
  handlers:
    main:
      type: rotating_file
      max_files: 10
      path: '%kernel.logs_dir%/%kernel.environment%/application.log'
      level: debug
      formatter: Monolog\Formatter\LineFormatter
      channels:
        - '!event'
        - '!job.execution'
        - '!job.clean-up'
        - '!job.notification'
    console:
      type: console
      channels: ['!event', '!doctrine']
      formatter: Monolog\Formatter\LineFormatter
    job.execution:
      type: rotating_file
      max_files: 10
      path: '%kernel.logs_dir%/%kernel.environment%/job.execution.log'
      level: debug
      formatter: Monolog\Formatter\LineFormatter
      channels: job.execution
    # same definitions for job.notification and job.clean-up

This config is not redefined in any environment-specific config, including config_prod.yml. However, my application doesn't log anything to files in prod environment (console emits what i've expected), while it does so in dev and test environments. The most common reason would be fingers crossed handler and/or level filter set too high, but this is not the case. What am i missing?

来源：https://stackoverflow.com/questions/46958482/symfony-doesnt-create-logs-in-production-environment