Laravel 队列主管工作人员给出异常

Question

我正在服务器上为 Laravel 项目中的队列工作事件运行主管。主管非常适合排队的作业，但是当我检查 worker.log 文件时，每秒都会发生一个异常。例外是

   ErrorException 

  A non well formed numeric value encountered

  at /var/www/html/mySampleProject/vendor/laravel/framework/src/Illuminate/Queue/Worker.php:729
    725â–•     {
    726â–•         if ($seconds < 1) {
    727â–•             usleep($seconds * 1000000);
    728â–•         } else {
  ➜ 729▕             sleep($seconds);
    730â–•         }
    731â–•     }
    732â–• 
    733â–•     /**

      [2m+17 vendor frames [22m
  18  /var/www/html/mySampleProject/artisan:37
      Illuminate\Foundation\Console\Kernel::handle()

每秒都会产生相同的异常。 我存储在 (/etc/supervisor/conf.d) 中的主管配置是

[program:queue-worker]
process_name=%(program_name)s_%(process_num)02d
command=php /var/www/html/mySampleProject/artisan queue:work database --sleep=3 --tries=3
autostart=true
autorestart=true
user=ubuntu
numprocs=2
redirect_stderr=true
stdout_logfile=/var/www/html/mySampleProject/storage/logs/worker.log

我还没有找到任何解决方案。请帮忙。提前致谢