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Appkernel class not found when upgrading to Symfony 3.0

I tried updating my code and structure to Symfony 3.0. Performing a regular composer update, I have this error when the composer executes post-update-cmd:

Fatal error: Class 'AppKernel' not found in C:\wamp\www\tharmofos\bin\console on line 20 Call Stack: 0.0002 235192 1. {main}() C:\wamp\www\tharmofos\bin\console:0 Fatal error: require_once(): Failed opening required 'C:\wamp\www\tharmofos\vendor\jms\security-extra-bundle\Tests\Functiona l/../../vendor/autoload.php' (include_path='.;C:\php\pear') in C:\wamp\www\tharmofos\vendor\jms\security-extra-bundle\Tests\ Functional\AppKernel.php on line 5 Call Stack: 0.0002 235192 1. {main}() C:\wamp\www\tharmofos\bin\console:0 0.0249 1144472 2. Symfony\Component\Debug\ErrorHandler::handleFatalError() C:\wamp\www\tharmofos\vendor\symfony\sym fony\src\Symfony\Component\Debug\ErrorHandler.php:0 0.0263 1162640 3. Symfony\Component\Debug\ErrorHandler->handleException() C:\wamp\www\tharmofos\vendor\symfony\symf ony\src\Symfony\Component\Debug\ErrorHandler.php:600 0.0292 1260456 4. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->handleError() C:\wamp\w ww\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\ErrorHandler.php:530 0.0292 1262144 5. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->getClassCandidates() C: \wamp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler.php: 62 2.5849 1595232 6. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->findClassInPath() C:\wa mp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler.php:118 2.6446 1600616 7. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->convertFileToClass() C: \wamp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler.php: 143 2.6453 1642120 8. require_once('C:\wamp\www\tharmofos\vendor\jms\security-extra-bundle\Tests\Functional\AppKernel.p hp') C:\wamp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandl er.php:188 Script Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache handling the post-update-cmd event terminated wit h an exception [RuntimeException] An error occurred when executing the ""cache:clear --no-warmup"" command: Fatal error: Class 'AppKernel' not found in C:\wamp\www\tharmofos\bin\console on line 20 Call Stack: 0.0002 235192 1. {main}() C:\wamp\www\tharmofos\bin\console:0 Fatal error: require_once(): Failed opening required 'C:\wamp\www\tharmofos\vendor\jms\security-extra-bundle\Tests\Func tional/../../vendor/autoload.php' (include_path='.;C:\php\pear') in C:\wamp\www\tharmofos\vendor\jms\security-extra-bun dle\Tests\Functional\AppKernel.php on line 5 Call Stack: 0.0002 235192 1. {main}() C:\wamp\www\tharmofos\bin\console:0 0.0249 1144472 2. Symfony\Component\Debug\ErrorHandler::handleFatalError() C:\wamp\www\tharmofos\vendor\symfon y\symfony\src\Symfony\Component\Debug\ErrorHandler.php:0 0.0263 1162640 3. Symfony\Component\Debug\ErrorHandler->handleException() C:\wamp\www\tharmofos\vendor\symfony \symfony\src\Symfony\Component\Debug\ErrorHandler.php:600 0.0292 1260456 4. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->handleError() C:\w amp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\ErrorHandler.php:530 0.0292 1262144 5. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->getClassCandidates () C:\wamp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHa ndler.php:62 2.5849 1595232 6. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->findClassInPath() C:\wamp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandl er.php:118 2.6446 1600616 7. Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->convertFileToClass () C:\wamp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHa ndler.php:143 2.6453 1642120 8. require_once('C:\wamp\www\tharmofos\vendor\jms\security-extra-bundle\Tests\Functional\AppKer nel.php') C:\wamp\www\tharmofos\vendor\symfony\symfony\src\Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatal ErrorHandler.php:188

At the moment, I tried to delete the provider folder and install the composer, but I keep getting this error. When I try to access my site, I get this error:

 Fatal error: Class 'Symfony\Bundle\FrameworkBundle\FrameworkBundle' not found in C:\wamp\www\tharmofos\app\AppKernel.php on line 11

I think this is a problem with updating the structure.

Do you have any hints?

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2 answers

I found out how to get rid of this error by automatically loading AppKernel.php in composer.json: https://github.com/symfony/symfony-standard/issues/868

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If this can help, I often forget to update the Symfony Standard file (e.g. app / console, web / app.php, web / app_dev.php, app / config / routing_dev.yml ...) when updating the project to 3.0.

This leads to this error.

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