7.3 Scheduler breaks without Serializer installed #60880
Description
Symfony version(s) affected
7.3.*
Description
7.3 included the following change to the Scheduler: #59679
This now requires the Serializer component to be installed if the Scheduler component is, but it isn't set as a composer dependency or mentioned in the UPGRADE file.
How to reproduce
Install the Scheduler component without the Serializer component.
Possible Solution
Making the Serializer component a dependency for the Scheduler component is a quick fix but ultimately a better solution should be pursued.
Additional Context
The following is what cache:clear spits out upon updating to 7.3 without the Symfony Serializer installed
Script cache:clear returned with error code 255
!! Symfony\Component\ErrorHandler\Error\ClassNotFoundError {#41
!! #message: """
!! Attempted to load interface "DenormalizerInterface" from namespace "Symfony\Component\Serializer\Normalizer".\n
!! """
!! #code: 0
!! #file: "./vendor/symfony/scheduler/Messenger/Serializer/Normalizer/SchedulerTriggerNormalizer.php"
!! #line: 19
!! trace: {
!! ./vendor/symfony/scheduler/Messenger/Serializer/Normalizer/SchedulerTriggerNormalizer.php:19 { …}
!! ./vendor/symfony/error-handler/DebugClassLoader.php:306 { …}
!! Symfony\Component\ErrorHandler\DebugClassLoader->loadClass() {}
!! ./vendor/symfony/framework-bundle/DependencyInjection/FrameworkExtension.php:2296 { …}
!! ./vendor/symfony/framework-bundle/DependencyInjection/FrameworkExtension.php:566 { …}
!! ./vendor/symfony/dependency-injection/Compiler/MergeExtensionConfigurationPass.php:81 { …}
!! ./vendor/symfony/http-kernel/DependencyInjection/MergeExtensionConfigurationPass.php:40 { …}
!! ./vendor/symfony/dependency-injection/Compiler/Compiler.php:73 { …}
!! ./vendor/symfony/dependency-injection/ContainerBuilder.php:813 { …}
!! ./vendor/symfony/http-kernel/Kernel.php:499 { …}
!! ./vendor/symfony/http-kernel/Kernel.php:744 { …}
!! ./vendor/symfony/http-kernel/Kernel.php:120 { …}
!! ./vendor/symfony/framework-bundle/Console/Application.php:177 { …}
!! ./vendor/symfony/framework-bundle/Console/Application.php:69 { …}
!! ./vendor/symfony/console/Application.php:192 { …}
!! ./bin/console:39 {
!! › $application = new Application($kernel);
!! › $application->run($input);
!! ›
!! }
!! }
!! }
!! 2025-06-23T11:42:49-05:00 [critical] Uncaught Error: Interface "Symfony\Component\Serializer\Normalizer\DenormalizerInterface" not found
!!