Are you running idmapd? Are your uid/gids unified between the client and server?
Everything gets squashed in NFSv4 until idmapd is configured on both the client and the server, and they are set to the same "domain" (by default everything in the FQDN except for the simple host name).
Assuming this is up, everything will be unsquashed, and it will behave like NFSv3.
Everything gets squashed in NFSv4 until idmapd is configured on both the client and the server, and they are set to the same "domain" (by default everything in the FQDN except for the simple host name).
Assuming this is up, everything will be unsquashed, and it will behave like NFSv3.