redis配置不能生效 [ 2.0 版本 ]

config里面的redis设置在yii\redis\Connection类的init里面还是有的,到了open方法里面就变缺省的了.
打印出的东西是:
代码如下

 'redis' => [
            'class' => 'yii\redis\Connection',
            'password'=>'111111',
            'hostname' => '10.8.17.211',
            'port' => 6379,
            'database' => 0,
        ],
  public function init()
  {
        parent::init();
        echo $this->hostname.' '.$this->port.' '.$this->password.'<br>';
  }
  public function open()
  {
        echo $this->hostname.' '.$this->port.' '.$this->password.'<br>';
        exit;
        //........................
  }