AWS上的Laravel队列工作程序找不到作业

Question

I have a Laravel(v-5.3.31) hosted on AWS ec2 instance(let's call it A). Database is on another AWS AURORA instance (lets call it B).

I have followed all the steps to create a queue. When I create a job through my Laravel application I am able to see the job in Jobs table. but when I create queue worker using command on A php artisan queue:work --once it just returns. it does not process any job.

In my job I am creating a new database on AURORA DB (B). Code is below -

public static function createDB($master_id)
    {
        $dbName = 'db_id_'.$master_id;

        DB::connection('AURORA')->statement('CREATE DATABASE IF NOT EXISTS '.$dbName);
    }

Some findings : 1. If I execute same steps from my local system, it is working. 2. If I remove code of db creation from JOB, line no 2. It works, means db creation is creating problem.

I am not able to find the reason, can any one give some hint ...