[symonfy] An error occurred when executing the "'cache:clear --no-warmup'"

Symfony Version: 3.4.*

当运行 composer update 会出现

[RuntimeException]                                                                                                                                       
  An error occurred when executing the "'cache:clear --no-warmup'" command:                                                                                
                                                                                                                                                           
                                                                                                                                                           
                                                                                                                                                           
  PHP Fatal error:  require_once(): Failed opening required '/srv/www/htdocs/sfs/vendor/doctrine/common/lib/Doctrine/Common/Persistence/ConnectionRegistr  
  y.php' (include_path='.:/usr/share/php7:/usr/share/php7/PEAR') in /srv/www/htdocs/sfs/var/cache/dev/ContainerFoco7kp/appDevDebugProjectContainer.php on  
   line 714                                                                                                                                                
                                                                                                                                                           
  In appDevDebugProjectContainer.php line 714:                                                                                                             
                                                                                                                                                           
    Compile Error: require_once(): Failed opening required '/srv/www/htdocs/sfs                                                                            
    /vendor/doctrine/common/lib/Doctrine/Common/Persistence/ConnectionRegistry.                                                                            
    php' (include_path='.:/usr/share/php7:/usr/share/php7/PEAR')              

运行 composer update --no-scripts

而解决 doctrine/common/lib/Doctrine/Common/Persistence/ConnectionRegistry.php 文件不存在，

我是参考 doctrine common 2.9 has moved reflection

在 composer.json 中 添加

"conflict": {
    "doctrine/common": ">2.8"
}

然后运行 composer update --no-scripts

重新运行 composer require doctrine/common

wakasann@linux-2ywt:/srv/www/htdocs/sfs> composer update --no-scripts    
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 0 installs, 2 updates, 3 removals
  - Removing doctrine/reflection (v1.0.0)
  - Removing doctrine/persistence (v1.0.1)
  - Removing doctrine/event-manager (v1.0.0)
  - Updating doctrine/common (v2.9.0 => v2.8.0): Downloading (100%)         
  - Updating doctrine/dbal (v2.8.0 => v2.7.2): Downloading (100%)         
Writing lock file
Generating autoload files

看到 doctrine/common 降到 2.8.0了，直接运行 composer update 也不会报错了

---

参考

1. doctrine common 2.9 has moved reflection
2. An error occurred when executing the “'cache:clear --no-warmup'” command