Magento Enterprise Cloud Edition bug: «The file "/composer.json" doesn't exist»

dmitrii_fediuk · July 21, 2017, 11:33am

As a guess, the message could be generated by the Symfony Config Component.
It is used by Magento 2.

The method Symfony\Component\Config\Resource\FileResource::__construct() has the following implementation:

symfony/config/blob/v3.2.12/Resource/FileResource.php#L28-L42


/**
 * Constructor.
 *
 * @param string $resource The file path to the resource
 *
 * @throws \InvalidArgumentException
 */
public function __construct($resource)
{
    $this->resource = realpath($resource) ?: (file_exists($resource) ? $resource : false);


    if (false === $this->resource) {
        throw new \InvalidArgumentException(sprintf('The file "%s" does not exist.', $resource));
    }
}

So it definitely can generate the «The file “/composer.json” doesn’t exist».
Can you log this exception and get it backtrace?
I am unable to do it myself, because you said your production filesystem is read-only, and, as I understand, the message is generated by the production instance.