nginx.conf檔案中有這一段
server {

    listen       80;
    server_name  hello.test.com;

    location / {
        root   html;
        index  index.html index.htm;
    }

    location /aa {
        root   /data1/htdocs/hello.test.com;
        index  index.html;
    }
}

配置location的時候，按照規則，我訪問hello.test.com/aa
應該會訪問/data1/htdocs/hello.test.com/index.html
然而實際是404 not found
我查看error.log看到

2016/08/07 10:53:40 [error] 4686#0: *8 open() "/data1/htdocs/hello.test.com/aa" failed (2: No such file or directory), client: 192.168.31.198, server: hello.test.com, request: "GET /aa HTTP/1.1", host: "hello.test.com"

然而確是在訪問 hello.test.com/aa 這個目錄了，而我的目錄下沒有這個文件，這是什麼情況，求解