Symfony 4.4 metadata_cache_driver configuration key deprecation notice

Question

Since I've upgraded Symfony from 4.4.15 to 4.4.16 I've got following deprecation notice:

The "metadata_cache_driver" configuration key is deprecated. PHP Array cache is now automatically registered when %kernel.debug% is false.

This is strange as the official docs don't say anything about this deprecation except of this text:

Deprecated since version 4.4:All the Doctrine caching types are deprecated since Symfony 4.4 and won’t be available in Symfony 5.0 and higher. Replace them with either type: service or type: pool and use any of the cache pools/services defined with Symfony Cache.

But I'm using caching type pool or service. My configuration looks like this:

doctrine:  
    orm:  
        metadata_cache_driver:
            type: pool
            pool: doctrine.system_cache_pool  

framework:
    cache:
        default_memcached_provider: 'memcached://localhost:11211'
        pools:
            doctrine.system_cache_pool:
                adapter: cache.adapter.memcached
                public: false
                default_lifetime: 86400

I even tried to config the cache as a service like this which gives me the same deprecation notice:

doctrine:
    orm:    
        metadata_cache_driver:
            type: service
            id: doctrine.system_cache_provider

services:
    doctrine.system_cache_provider:
        class: Symfony\Component\Cache\DoctrineProvider
        public: false
        arguments:
            - '@doctrine.system_cache_pool'

framework:
    cache:
        default_memcached_provider: 'memcached://localhost:11211'
        pools:
            doctrine.system_cache_pool:
                adapter: cache.adapter.memcached
                public: false
                default_lifetime: 86400

Any ideas how to get rid of the deprecation notice?

Nothing wrong with this question, don't get the downvote either. Here is the pull request that added the deprecation notice: https://github.com/doctrine/DoctrineBundle/pull/1196. That might give some information. — Stephan Vierkant, Nov 10 '20 at 11:42

dmaicher · Accepted Answer · 2021-03-23T20:39:22.140

6

Actually the deprecation was reverted: https://github.com/doctrine/DoctrineBundle/pull/1255

So please make sure to keep the metadata_cache_driver config for your production environments when upgrading to DoctrineBundle 2.2.1.

EDIT: The feature was released again with version 2.3.0 of DoctrineBundle. So the metadata_cache_driver config can safely be removed for prod environments when using this version.

edited Mar 23 '21 at 20:39

answered Nov 10 '20 at 20:25

dmaicher

156
4

Do you know if it's save to remove the metadata_cache_driver entry or is the removal necessary at all on PROD? Getting following deprecation notice on DEV: "The "metadata_cache_driver" configuration key is deprecated. PHP Array cache is now automatically registered when %kernel.debug% is false" – ninsky Mar 22 '21 at 14:19
1

@ninsky indeed when using version 2.3.0 you can remove the config option as the feature was released again. I updated my comment above. – dmaicher Mar 23 '21 at 20:40

score 4 · Answer 2 · answered Nov 10 '20 at 15:22

As of DoctrineBundle 2.2.0 you can safely remove metadata_cache_driver from your configuration. There is no replacement; just delete it.

The pull request that introduced this deprecation notice gives some explanation: "Change is needed because defining own metadata_cache_driver is useless from now on."

Doctrine now uses PhpArrayAdapter in production environment.

Symfony 4.4 metadata_cache_driver configuration key deprecation notice

2 Answers2