nfs服务端服务停掉,导致的客户端访问挂载目录卡死的情况

环境描述&＃xff1a;

A 机器&＃xff08;192.168.1.201&＃xff09;&＃xff0c; B机器上挂载了A机器上的storage目录 到本机的storage目录&＃xff08;命令&＃xff1a; mount -t nfs 192.168.1.201:/storage  /storage&＃xff09;

故障原因&＃xff1a;

现在因 A机器因故障无法访问&＃xff0c;登录B机器以后执行mount &＃xff0c;df -h &＃xff0c;ll  /storage  等关于/storage挂载点的时候都会卡主&＃xff0c;ctrl &＃43; c  、 ctrl &＃43; z 都不能结束&＃xff0c;只能退出重新登录。

解决方法&＃xff1a; 

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Device or resource busy

umount: /storage: device is busy

[root&＃64;Image-Web ~]# umount -f /storage

umount2: Invalid argument

umount: /storage: not mounted

前面貌似执行umount -f /storage 强制卸载时不起作用的&＃xff0c;但是最后是能卸载掉的&＃xff01;&＃xff01;&＃xff01;

有人说为了避免这个问题&＃xff0c;挂载的时候要加和上soft选项。&＃xff08;没亲自试过&＃xff09;

来源&＃xff1a;http://weekend.blog.163.com/blog/static/74689582010212104053931/