I'm getting a lot of noise in the logs from requests that are auto generated from browsers and spiders (like favico.ico, robots.txt, /home /news etc) that doesn't actually have any endpoints.

These get caught by index.php and throws

[yii\web\HttpException:404] yii\web\NotFoundHttpException: Template not found: new in /app/vendor/craftcms/cms/src/controllers/TemplatesController.php:93"

Which is causing a tremendous amount of noise. I would never consider a 404 a real error, so I would like to not log this at all in Craft (I can use access log aggregation for this).

However, I'm not sure how to go about it. I have already created a custom log component, to remove the logging of all server variables on error, and send outputs to stderr (because of docker), with yii2-streamlog.

My log config is as follows:

    'components' => [
        'log' => function() {
            return Craft::createObject([
                'class' => yii\log\Dispatcher::class,
                'targets' => [
                        'class' => codemix\streamlog\Target::class,
                        'url' => 'php://stderr',
                        'levels' => Logger::LEVEL_ERROR | Logger::LEVEL_WARNING,
                        'logVars' => []

  • Seems like adding a 'except' => ['yii\web\HttpException:404'] to the target removes it from my streamlog
    – jishi
    Commented Nov 19, 2019 at 21:18

1 Answer 1


Those should not be logged in web.log when running Craft 3.x, but rather in the web404s.log -- assuming you don't have devMode on (which it shouldn't be on for production...)

Vide: Zen and the Art of Craft CMS Log File Reading

Also should you really want to customize things, it's not hard to do with Craft CMS, check out: Creating a Custom Logger for Craft CMS

  • I don't have devMode on, but I have changed to a the streamlog, but don't understand why that would enable it? I just can't have a file since I'm running in AWS ECS as a container. But I assume I could add an except config somehow to remove the yii\web\HttpException:404 namespace?
    – jishi
    Commented Nov 19, 2019 at 20:57
  • I added a section on Monolog as a Logger that I think answers what you're trying to do here: Creating a Custom Logger for Craft CMS (see the 'except' key/value) Commented Nov 21, 2019 at 18:24
  • Nice, Monolog seems like a more versatile setup than yii2-streamlog.
    – jishi
    Commented Nov 21, 2019 at 23:40

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