[ 2017-01-22T00:45:59+08:00 ] 127.0.0.2 127.0.0.1 GET /index.php/install/step/third.html
[ error ] [10501]SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute.[D:\wamp64\www\Web\thinkphp\library\think\db\Connection.php:405]

请问这里为什么报错呢？？？？