ID Mapping Problems
The following situations can cause ID mapping to fail:
-
If a user or group that exists in an ACL entry on the server cannot be mapped to a valid user or group on the client, the user can read the ACL but some of the users or groups will be shown as
unknown
.For example, in this situation when you issue the
ls
-lv
orls
-lV
command, some of the ACL entries will have the group or user displayed asunknown
. -
If the user ID or group ID in any ACL entry that is set on the client cannot be mapped to a valid user ID or group ID on the server, the
chmod
command can fail and return thePermission denied
error message. -
If the client and server have mismatched
nfsmapid_domain
values, ID mapping fails. For more information, see NFS Daemons.
To avoid ID mapping problems, do the following:
-
Make sure that the value for
nfsmapid_domain
is set correctly. The currently selected NFSv4 domain is available in the/var/run/nfs4_domain
file. -
Make sure that all user IDs and group IDs in the ACL entries exist on both the NFS Version 4 client and server.