public function requestJob()
    {
        $findCond = [
            'conditions' => [
                'completed' => 0
            ],
            'order' => [
                'created ASC',
                'id ASC',
            ],
            'limit' => 3,
        ];

        $jobs = $this->find('all', $findCond)->all()->toArray();
        for ($i=0; $i<count($jobs); $i++) {
            if ($jobs[$i]['stats']['tries'] >= $this->maxTries) {
                unset($jobs[$i]);
            }
        }
        return $jobs;
    }