Kerberised NFSv4 stops working after upgrade to 13.10: "RPC: AUTH_GSS upcall timed out"

[Elias Martenson]

Configuration:

Ubuntu 13.10 client, mounting NFS directories from FreeBSD server.

Only NFSv4 is used. Authentication is done using the "krb5p" method. Relevant line /etc/fstab:

lion:/export/shared/videos /lion/videos nfs4 sec=krb5p 0 2

There are a few more of the same, mounting other directories.

After upgrading from the previous version to 13.10, the mounts does not work anymore. Trying to mount manually using: "mount /lion/videos" causes the mount command to hang. After terminating the mount command (Control-C) the syslog displays the following:

Nov 4 21:57:13 tiger kernel: [ 463.976830] RPC: AUTH_GSS upcall timed out.
Nov 4 21:57:13 tiger kernel: [ 463.976830] Please check user daemon is running.
Nov 4 21:57:13 tiger kernel: [ 463.976960] NFS: nfs4_discover_server_trunking unhandled error -512. Exiting with error EIO

The gssd daemon is running:

elias@tiger:~$ ps -ef | grep gss
root 4998 3035 0 22:03 ? 00:00:00 /usr/sbin/rpc.svcgssd -vvv

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: nfs-common 1:1.2.8-2ubuntu2
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Mon Nov 4 21:58:15 2013
InstallationDate: Installed on 2010-07-23 (1199 days ago)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MarkForUpload: True
SourcePackage: nfs-utils
UpgradeStatus: Upgraded to saucy on 2013-10-18 (16 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.