Magento 2 custom logger 'Missing required argument $name'

Question

I'm trying to create a custom logger, so I can log to a custom log file.

I've looked at and followed multiple tutorials that all say the same, however I keep getting the same error.

Tutorials that I followed:

• http://www.thienphucvx.com/magento-2-logging-to-a-custom-file/
• https://www.maximehuran.fr/en/logs-and-magento-2/
• https://ranasohel.me/2016/06/26/how-to-create-a-custom-logger-in-magento-2/
• How to create custom Log file in Magento 2?

This is not a duplicate of How to create custom Log file in Magento 2? as I followed everything that was explained there but got this error regardless.

I keep receiving the error: Missing required argument $name of Burst\MageNinjaApi\Logger\Logger., but far as I am aware, I am supplying the argument $name with <argument name="name" xsi:type="string">MageNinjaApiLogger</argument> in etc/di.xml.

Magento version: 2.1.10

---

app/code/Burst/MageNinjaApi/etc/di.xml

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
 <preference for="Burst\MageNinjaApi\Catalog\Api\ProductRepositoryInterface" type="Burst\MageNinjaApi\Catalog\ProductRepository" />
 <preference for="Burst\MageNinjaApi\Quote\Api\GuestCartItemRepositoryInterface" type="Burst\MageNinjaApi\Quote\GuestCartItemRepository" />
 <preference for="Burst\MageNinjaApi\Quote\Api\Data\CartItemInterface" type="Burst\MageNinjaApi\Quote\Item" />
 <!-- Custom Logger -->
 <type name="Burst\MageNinjaApi\Logger\Handler\Debug">
 <arguments>
 <argument name="filesystem" xsi:type="object">Magento\Framework\Filesystem\Driver\File</argument>
 </arguments>
 </type>
 <type name="Burst\MageNinjaApi\Logger\Logger">
 <arguments>
 <argument name="name" xsi:type="string">MageNinjaApiLogger</argument>
 <argument name="handlers" xsi:type="array">
 <item name="debug" xsi:type="object">Burst\MageNinjaApi\Logger\Handler\Debug</item>
 </argument>
 </arguments>
 </type>
</config>

app/code/Burst/MageNinjaApi/Logger/Logger.php

<?php
namespace Burst\MageNinjaApi\Logger;
class Logger extends \Monolog\Logger {
}

app/code/Burst/MageNinjaApi/Logger/Handler/Debug.php

<?php
namespace Burst\MageNinjaApi\Logger\Handler;
use Magento\Framework\Logger\Handler\Base;
use Monolog\Logger;
class Debug extends Base {
 protected $fileName = '/var/log/MageNinjaApi/debug.log';
 protected $loggerType = Logger::DEBUG;
}

• Abdul: Possible duplicate of How to create custom Log file in Magento 2?
• dbrekelmans: It's not a duplicate. I followed the instructions on that page as I explained in my post (see under "Tutorials that I followed".

Answer 1

I have encountered this problem as you had. The problem is the new configuration: <argument name="name" xsi:type="string">MageNinjaApiLogger</argument> in etc/di.xml is not updated.

Run php bin/magento cache:flush to update di.xml => It will solve this problem.

• dbrekelmans: I did not test this but it sounds very plausible. Thanks for the response.
• thienphucvx: Yes. I have tested it.
• Black: I tested it and it worked (Magento 2.4.4-p3)

Answer 2

For what it's worth, I ran into this error when I forgot to enable my logger module, but I enabled a different module that depended on it. Could be a missing dependency.

Answer 3

This was resolved by updating Magento to version 2.2.1. I did not find out what caused the problem.

• performadigital: This doesn't really add anything to the issue, seems likely the upgrade to a higher version meant you'd cleared the cache which is the accepted answer.