1. Managing Network File Systems in Oracle Solaris 11.4
  2. Network File System Features
  3. How the NFS Service Works
  4. Features in NFS Version 4
  5. ACLs and nfsmapid in NFS Version 4
  6. ID Mapping Problems

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 or ls -lV command, some of the ACL entries will have the group or user displayed as unknown.

  • 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 the Permission 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.