访问权限取决于安装

Question

我无法访问目录，我不明白为什么：

用户“exchange”位于正确的组中，可以访问未安装的目录application1_exchange_test，但不能访问application1_exchange。唯一的区别是 application1_exchange 是 nfs 挂载。

root@application2-dev:/var/spool/application1_exchange/from# namei -mo `pwd`
f: /var/spool/application1_exchange/from
 drwxr-xr-x root    root    /
 drwxr-xr-x root    root    var
 drwxr-xr-x root    root    spool
 drwxrwx--- tomcat8 tomcat8 application1_exchange
 drwxrwxr-x tomcat8 tomcat8 from

root@application2-dev:/var/spool/application1_exchange/from# su exchange

exchange@application2-dev:/var/spool/application1_exchange/from$ groups 
exchange tomcat8

exchange@application2-dev:/var/spool/application1_exchange/from$ ls -ld . .. ../..
ls: cannot access '../..': Permission denied
drwxrwxr-x  3 tomcat8 tomcat8 4096 Jun 21 07:31 .
drwxrwx--- 11 tomcat8 tomcat8 4096 Jun 21 07:31 ..

exchange@application2-dev:/var/spool/application1_exchange/from$ cd /var/spool/application1_exchange
bash: cd: /var/spool/application1_exchange: Permission denied

exchange@application2-dev:/var/spool/application1_exchange/from$ cd /var/spool/

exchange@application2-dev:/var/spool$ ls -dl application1_exchange*
drwxrwx--- 11 tomcat8 tomcat8 4096 Jun 21 07:31 application1_exchange
drwxrwx---  3 tomcat8 tomcat8 4096 Jul  9 11:08 application1_exchange_test

exchange@application2-dev:/var/spool$ ls -l application1_exchange*
ls: cannot open directory 'application1_exchange': Permission denied
application1_exchange_test:
total 4
drwxr-xr-x 3 tomcat8 tomcat8 4096 Jul  9 11:08 from

exchange@application2-dev:/var/spool$ findmnt /var/spool/application1_exchange
TARGET                       SOURCE                     FSTYPE OPTIONS
/var/spool/application1_exchange 192.168.1.1:/mnt/exchange nfs    rw,relatime,sync,vers=3,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,timeo=600,

已卸载目录的所有权不起作用。是root但是也跟tomcat8一样。 nfsd /导出选项是rw，no_root_squash，sync，no_subtree_check