CronQueueTestException.php

<?php

namespace Drupal\cron_queue_test\Plugin\QueueWorker;

use Drupal\Core\Queue\QueueWorkerBase;

/**
 * @QueueWorker(
 *   id = "cron_queue_test_exception",
 *   title = @Translation("Exception test"),
 *   cron = {"time" = 1}
 * )
 */
class CronQueueTestException extends QueueWorkerBase {
    
    /**
     * {@inheritdoc}
     */
    public function processItem($data) {
        $state = \Drupal::state();
        if (!$state->get('cron_queue_test_exception')) {
            $state->set('cron_queue_test_exception', 1);
            throw new \Exception('That is not supposed to happen.');
        }
        else {
            $state->set('cron_queue_test_exception', 2);
        }
    }

}