flysystem: Exception thrown by Local driver attempting to create directory in quick succession

I have an application where I allow a user to pick multiple files for upload from a web form. These are then submitted individually and asynchronously using jQuery and HTML FormData.

If I have several small files submitting at once, it is possible that the server arrives at Local::ensureDirectory() almost simultaneously and the if ( ! is_dir($root)) check returns an incorrect result.

This can result in an ErrorException “mkdir(): File exists”. I’m not sure you can reproduce the error without my app, but steps would be:

• Laravel 5.2 app running on local Vagrant Homestead instance with PHP7
• Multiple async submissions to a route which should result in creation of a directory that does not yet exist
• Produces exception below:

This may well be a PHP problem and/or Vagrant not running fast enough in a local environment, but I wonder if it’s possible to mitigate, perhaps wrapping in try/catch that looks for the “File exists” message? I’ve checked the Exception thrown for other problems such as permissions and unfortunately it’s identical apart from the message - and I guess that may change in different languages.