Prevent duplicate output for errors in Python logger

Question

I get duplicate logging output for exceptions and errors in my pythong LOGGING confirmation. It makes sense given the configuration:

LOGGING = {
    'handlers': {
        'mail_admins': {
            'level': 'ERROR',
            'filters': ['require_debug_false'],
            'class': 'django.utils.log.AdminEmailHandler'
        },
        'sentry': {
            'level': 'WARNING',
            'class': 'raven.contrib.django.handlers.SentryHandler',
        },
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'formatter': 'verbose'
        },
    },
    'root': {
        'level': 'ERROR',   # Give me errors only
        'handlers': ['mail_admins', 'sentry', 'console'],
    },
    'apps.order_shipping': {
        # This module needs extra debugging, but now ERROR is duplicated
        'handlers': ['console'],
        'level': 'DEBUG',
    },
}

how can I implement this in a better way? I'd like to enable verbosity for some modules, without causing duplication of ERROR messages.

stalk · Accepted Answer · 2014-09-08 13:08:46Z

3

Set propagate to False:

{
# ...
    'apps.order_shipping': {
        # This module needs extra debugging, but now ERROR is duplicated
        'handlers': ['console'],
        'level': 'DEBUG',
        'propagate': False,
    },
}

answered Sep 8, 2014 at 13:08

stalk

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2 Comments

vdboor Over a year ago

I'm curious, won't this block ERROR messages from being picked up by the root logger? So the only solution is duplicating the list of handlers for all other loggers too?

vdboor Over a year ago

I've taken the non DRY route of repeating all handlers for all loggers. A shame, but I don't see any other way right now.

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