Log file rotation not working according to configuration

[mamadza]

I have configured the log rotation settings in my web.php file as follows:

'targets' => [
    [
        'class' => 'yii\log\FileTarget',
        'levels' => ['error', 'warning'],
        'except' => [
            'yii\web\HttpException:403',
            'yii\web\HttpException:404',
        ],
        'maxFileSize' => 200 * 1024, // 200MB
        'maxLogFiles' => 40,
    ],
],

However, it seems that Yii is still using the default log rotation settings.
The log file does not rotate based on the configuration above.

Expected behavior:
Log files should rotate when they reach the configured size (maxFileSize) and respect the defined number of files (maxLogFiles).

Yii Version: 2.0.53

[terabytesoftw]

This is expected behavior by design, not a bug.

The rotation check in FileTarget::export() (line 130) runs before writing the current batch of messages. This means:

1. If the file is below maxFileSize before the write, messages are appended without rotation even if the write pushes the file beyond the limit.
2. On the next export() call, the file size check detects the overshoot and triggers rotation.

This is a lazy rotation strategy: the file may temporarily exceed maxFileSize by up to one flush worth of messages, but it will be rotated on the subsequent flush.

To verify your configuration is working:

• Check that rotated files (app.log.1, app.log.2, etc.) are being created.
• If no rotated files exist, the log file has likely not yet exceeded maxFileSize at the time of a rotation check.