Switching off FPC causes config key collision (beta)

[amenk]

Steps to reproduce:

1. Disable a cache (full page cache in backend)

2. Now the cache settings are written to env.php

3. On the next page view, I get the following error:

   exception 'Exception' with message 'Key collision! The following keys occur in multiple config files: cache_types 
   ' in /home/me/workspace/example.com/public/lib/internal/Magento/Framework/App/DeploymentConfig/Reader.php:91 Stack
    trace: #0 /home/me/workspace/example.com/public/lib/internal/Magento/Framework/App/DeploymentConfig.php(130):
    Magento\Framework\App\DeploymentConfig\Reader->load() #1 /home/me/workspace/example.com/public/lib/internal/Magento
   /Framework/App/DeploymentConfig.php(72): Magento\Framework\App\DeploymentConfig->load() #2 /home/me/workspace/example.com
   /public/lib/internal/Magento/Framework/App/ObjectManagerFactory.php(112): Magento\Framework\App\DeploymentConfig->get() #3 
   /home/me/workspace/example.com/public/lib/internal/Magento/Framework/App/Bootstrap.php(384): Magento\Framework\App
   \ObjectManagerFactory->create(Array) #4 /home/me/workspace/example.com/public/lib/internal/Magento/Framework/App/Bootstrap.php(231): 
   Magento\Framework\App\Bootstrap->initObjectManager() #5 /home/me/workspace/example.com/public/index.php(38): 
   Magento\Framework\App\Bootstrap->createApplication('Magento\\Framewo...') #6 {main}
   

What I saw is, that the cache_types section is in env.php as well as config.php. I actually was expecting, that config file merging / overwriting of values should work?

[mazhalai]

@amenk This error happens if you had an older version of magento 2 when config was saved only in config.php. Now config.php only has module related info. There is no way to accurately determine which is the correct set to overwrite values.

[amenk]

I started with the merchant beta ...

[mazhalai]

@amenk can you give us detailed steps to reproduce this issue? We are having trouble reproducing it.

[amenk]

As far as I remember, I did a composer based installation of Magento and then tried to change the cache settings.

[monkeysee]

@amenk , I tried to reproduce, but could not. The steps I tried were:

1. composer create-project magento/project-community-edition --stability="beta" magento2Proj
2. Ran through the setup wizard
3. Examined config files

• app/etc/config.php, only contains array of enabled modules
• app/etc/env.php contains other settings, including 'full_page' => 1 in cache_types array

4. Went to admin and disabled full page cache
5. Went to front end, pages loaded OK
6. Went to other pages in Admin, they are OK also
7. examined config files:

• app/etc/config.php, still only contains array of enabled modules
• app/etc/env.php contains other settings, including 'full_page' => 0 in cache_types array

There was a time when we only had config.php, and all settings were in there. When we split the config it was necessary to reinstall to get everything in the right place. Is it possible you had an old version of config.php? or some files in the var/generation directory from an older install? You shouldn't have anything else in config.php other than the array of modules.

env.php and config.php are not merged, rather they have different entries in them. If you have the same entry in both, then you see the error you are getting.

[amenk]

I am having "magento/product-community-edition": "1.0.0-beta" - when I install now it is -beta2
Maybe there was that change?

[amenk]

This is all pretty confusing as there are no -beta1 and -beta2 tags in this (magento/magento2/) github repository...

[monkeysee]

I tried with the 1.0.0-beta and still no failure. The split of the config files took place before 1.0.0-beta. Did you ever install before 1.0.0-beta?
If you edit the config files so that config.php only has the 'modules' array, and env.php has everything else, it should work on 1.0.0-beta and beyond.

[amenk]

I did a fresh installation at 2015-08-24. I will try to edit the config files and see what happens.

[amenk]

I am not sure, but I might have tried to switch caching with n98-magerun2.phar - maybe there is or was an issue.

[amenk]

Putting the cache config to env.php solved the problem.
So it's not reproducible. Not worth the effort. I am closing this.
@monkeysee thanks a lot for your help.

[monkeysee]

NP, @amenk, glad you got it going. We'll keep an eye out for this in the future.