Uncaught exception 'think\exception\ErrorException' with message 'error_log(/www/api/public/../runtime/log/201611/29.log): failed to open stream: Permission denied' in /www/api/thinkphp/library/think/log/driver/File.php

当赋权限后当天可以，但是明天生成新的log的时候就又出现这样的问题。（环境时Linux）