Fatal Error - Failed opening required /var/task/vendor/composer/../symfony/polyfill-php80/bootstrap.php

[bradleyess]

I have been able to "successfully" deploy a Symfony application of ours using Serverless x Bref. The application shows this error when accessing via web:

{"message":"Internal Server Error"}

Looking into Cloudwatch Logs it appears this would be the cause:

Fatal error: require(): Failed opening required '/var/task/vendor/composer/../symfony/polyfill-php80/bootstrap.php' (include_path='.:/opt/bref/lib/php') in /var/task/vendor/composer/autoload_real.php on line 71

I have looked into the deployment artifact and can confirm the file it is looking for exists...

Here is the serverless.yml file:

service: bref-demo-symfony
plugins:
    - ./app/vendor/bref/bref

provider:
    name: aws
    region: ap-southeast-2
    runtime: provided.al2
    lambdaHashingVersion: 20201221
    environment:
        # todo - set via SM/SSM
        APP_ENV: prod
        LOG_LEVEL: info
        ENV_HOSTNAME: monolith.linktree.test
        SYMFONY_ENV: dev
        STAGE: local
        RELEASE: local

functions:
    # todo - Provide working example of message consumer.
    # todo - Provide working example of standalone PHP Lambda function.

    monolith:
        handler: app/public/index.php
        timeout: 28 # in seconds (API Gateway has a timeout of 29 seconds)
        layers:
            - ${bref:layer.php-74-fpm}
        events:
            - httpApi: '*'

    console:
        handler: app/bin/console
        timeout: 120 # in seconds
        layers:
            - ${bref:layer.php-74} # PHP
            - ${bref:layer.console} # The "console" layer

package:
    individually: true
    excludeDevDependencies: false
    exclude:
        - 'node_modules/**'
        - 'app/node_modules/**'
        - 'app/var/**'
        - 'app/public/assets/**'
        - 'server/**'
        - 'scripts/**'
        - 'docker/**'
        - 'codedeploy/**'
        # Include doesn't work nicely.
        - '!app/public/config.php'
        - '!app/public/index.php'
        - '!app/bin/**'
        - '!app/src/**'
        - '!app/templates/**'
        - '!app/translations/**'
        - '!app/vendor/**'

[mnapoli]

Hi!

I have looked into the deployment artifact and can confirm the file it is looking for exists...

That is very weird then 🤔 I'm not sure how to debug further TBH.

Maybe try running the app locally with Docker, and you may be able to reproduce the problem?

Also could you just double-check that it's not a permission issue in the zip that is being deployed?

Also that you use the same PHP version when deploying (the one that runs composer install) and the one in Lambda (PHP 7.4 as far as I can tell).