[2.4.4] Missing Frontend CacheInfo breaks bin/magento

[Hexmage]

Preconditions and environment

• Magento 2.4.4
• Upgrade from 2.3.2
• Website is a PWA so doesn't use regular frontend.

Steps to reproduce

composer update --no-dev Run bin/magento.

Expected result

See a list of commands.

Actual result

Warning: Undefined array key "frontend" in ../vendor/magento/framework/App/Cache/Frontend/Pool.php on line 90

Additional information

I have no clue what causes the exact scenario to start happening. But it appears that it's a minor programming oversight. Where someone assumed that if cacheInfo exists, the frontend cacheInfo also exists which apparently isn't true.

Fix is changing line 89 from if (null !== $cacheInfo) { to if (null !== $cacheInfo && isset($cacheInfo[FrontendPool::KEY_FRONTEND_CACHE]) {

Release note

No response

Triage and priority

• [X] Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• [ ] Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• [ ] Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• [ ] Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• [ ] Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

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[engcom-Delta]

Hi @Hexmage , Thank you for raising an issue , We tried to reproduce the issue on Magento PWA Venia instance and Magento 2.4.4 instance ,Issue is not reproducible. Hence review provided steps.

Please find the attached reference video. https://www.loom.com/share/7e2490b4c3fc4f5ca6922c16c81d9e62

[devchris79]

@Hexmage I just had this issue, I initially tried the fix you suggested but it still reported errors for me.

I got to the root for my instance, we use LiteSpeed cache and when I looked in the admin panel it had dropped back to built in cache (I commented out lines 89-91 of pool.php temporarily). The culprit was somehow our .htaccess was missing this:

<IfModule Litespeed>
    LiteMage on
</IfModule>

When I added this the cache setting selection had reverted back to Litespeed without me reselecting it. It would seem just as you found that when the expected cache configuration isn't there it crashes.

[Hexmage]

@devchris79 Then I probably know what it was. My staging and live environments run on Varnish. But my develop environment doesn't. But I had synced the config from my staging to my develop environment.

So the real issue is that if a caching method is selected in the configuration that can't work it throws a very awkward error.

[devchris79]

@Hexmage It would certainly seem that is the case. I am guessing the data provider function getConfigData isn't retrieving an intended null. Maybe the data array element is there but with invalid elements within the config.

 public function getConfigData()
    {
        return $this->data['config'] ?? [];
    }

[devchris79]

@Hexmage Do you now have an additional entry in your env.php? Something like:

, ‘cache’ => [ ‘graphql’ => [ ‘id_salt’ => ‘SALTHERE’ ] ]

[devchris79]

@Hexmage I think your original fix is what's required, I think that I had two issues going on at the same time with Litespeed cache loss provoking your issue.

[richardreen]

I did change the line in pool.php as described here . But new error, syntax error....I can not find the error...

syntax error, unexpected '{'#0 /home/user222/domains/xxxxxx.xx/public_html/vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile('/home/u58658p55...') #1 [internal function]: Composer\Autoload\ClassLoader->loadClass('Magento\Framewo...') #2 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(121): spl_autoload_call('Magento\Framewo...') #3 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(108): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\Framewo...', Array) #4 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(150): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\Framewo...') #5 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(79): Magento\Framework\ObjectManager\Factory\Compiled->get('Magento\Framewo...') #6 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(150): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\Framewo...') #7 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(79): Magento\Framework\ObjectManager\Factory\Compiled->get('Magento\Framewo...') #8 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(150): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\Framewo...') #9 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(79): Magento\Framework\ObjectManager\Factory\Compiled->get('Magento\Framewo...') #10 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/ObjectManager/ObjectManager.php(70): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\Framewo...') #11 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/App/ObjectManager/Environment/Compiled.php(113): Magento\Framework\ObjectManager\ObjectManager->get('Magento\Framewo...') #12 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/App/ObjectManagerFactory.php(191): Magento\Framework\App\ObjectManager\Environment\Compiled->configureObjectManager(Object(Magento\Framework\Interception\ObjectManager\Config\Compiled), Array) #13 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/App/Bootstrap.php(212): Magento\Framework\App\ObjectManagerFactory->create(Array) #14 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/App/Bootstrap.php(127): Magento\Framework\App\Bootstrap->__construct(Object(Magento\Framework\App\ObjectManagerFactory), '/home/user222...', Array) #15 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/Console/Cli.php(184): Magento\Framework\App\Bootstrap::create('/home/u58658p55...', Array) #16 /home/user222/domains/xxxxxx.xx/public_html/vendor/magento/framework/Console/Cli.php(84): Magento\Framework\Console\Cli->initObjectManager() #17 /home/user222/domains/xxxxxx.xx/public_html/bin/magento(22): Magento\Framework\Console\Cli->__construct('Magento CLI') #18 {main}

[devchris79]

@richardreen, I think @Hexmage has a small error from his suggested fix below, he is missing a closing bracket from the if statement:

Fix is changing line 89 from if (null !== $cacheInfo) { to if (null !== $cacheInfo && isset($cacheInfo[FrontendPool::KEY_FRONTEND_CACHE]) {

Try this instead: if (null !== $cacheInfo && isset($cacheInfo[FrontendPool::KEY_FRONTEND_CACHE])) {

[richardreen]

oke, corrected it and now it runs...no error about syntax error anymore. Let's see if this is solving the graphql error.

[richardreen]

now presenting a new error: Notice: Undefined index: query in /home/u222/domains/xxxxxx.xx/public_html/vendor/magento/module-graph-ql/Controller/GraphQl.php on line 208

and the salt entry still added to env.php

[devchris79]

That issue with a fix is here: #35412

[richardreen]

after correcting that, the next error

{"errors":[{"message":"Syntax Error: Unexpected <EOF>","extensions":{"category":"graphql"},"locations":[{"line":1,"column":1}]}]}

and 500 error and salt...in the env.php.. still not solved!!

[engcom-Delta]

Hi @Hexmage , Are you still facing the same issue ? . Kindly confirm.

Thanks

[Hexmage]

@engcom-Delta I've implemented my workaround with a patch to avoid the issue. But I'm very confident it's caused by having a caching system configured that doesn't run on your system. eg. Having Varnish configured but don't have any Varnish installed.

[engcom-Delta]

Hi @Hexmage , Thank you for the update. Shall we close it ? then?

Regards,

[Hexmage]

@engcom-Delta This scenario could use some better error handling. Because it's very unclear that a incorrectly configured FPC is causing the issue.

[m2-assistant[bot]]

Hi @engcom-Dash. Thank you for working on this issue. In order to make sure that issue has enough information and ready for development, please read and check the following instruction: :point_down:

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[engcom-Dash]

Hi @Hexmage,

We are checking the issue with 2.4-develop instance and we are not able to reproduce the issue because we are getting expected result....

Screenshots:

Steps: 1.install Magento instance 2.Update the instance using composer update command 3.Composer update completed successfully

Let us know if we missing anything!!!

Thanks!!!

[Hexmage]

@engcom-Dash Did you configure Varnish on the server before upgrade but don't actually have varnish installed?

This is what I believe results in the error. Also it only showed when running bin/magento

[RajasekarPanneerselvam]

@magento give me 2.4-develop instance

[engcom-Dash]

@magento give me 2.4-develop instance

[engcom-Dash]

@magento give me 2.4-develop instance

[magento-deployment-service[bot]]

Hi @engcom-Dash. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service[bot]]

Hi @engcom-Dash, here is your Magento Instance: https://a0c7ab63ae156afb6b38ad4d58baf5ee.instances.magento-community.engineering Admin access: https://a0c7ab63ae156afb6b38ad4d58baf5ee.instances.magento-community.engineering/admin_505d Login: 24bf950b Password: a05739bdfed7

[engcom-Dash]

Hi @Hexmage ,

As per your instructions we enabled varnish on the server before upgrade...Even though we getting the same results.

Screenshots:

Let us know if we missing anything!!!

Thanks!

[Hexmage]

@engcom-Dash I've had the issue happen to multiple different shops between 2.4.4 and 2.4.5. But I have no clue how the effectively reproduce it on a clean installation.

[engcom-Dash]

Hi @Hexmage ,

We tried both Local and cloud instance we are same results...Any how we will try once with fresh installation and will update you ASAP.

Thanks!!!

[Hexmage]

@engcom-Dash We found the cause of the issue, we had the following node in our app/etc/env.php

    'cache' => [
        'graphql' => [
            'id_salt' => '[A SALT HASH]'
        ]
    ] 

Because there is a graphql node it automatically also expects there to be a frontend node, which isn't always true.