Comment 2 for bug 1320658

I'm having the same problem (albeit with Linux Mint 17 RC).

Full gssd session output:

jhogg@delves ~ $ sudo rpc.gssd -fvvv
beginning poll
destroying client /run/rpc_pipefs/nfs/clnt4b
Closing 'gssd' pipe for /run/rpc_pipefs/nfs/clnt49
destroying client /run/rpc_pipefs/nfs/clnt4a
destroying client /run/rpc_pipefs/nfs/clnt49
handling gssd upcall (/run/rpc_pipefs/nfs/clnt56)
handle_gssd_upcall: 'mech=krb5 uid=0 service=* enctypes=18,17,16,23,3,1,2 '
handling krb5 upcall (/run/rpc_pipefs/nfs/clnt56)
process_krb5_upcall: service is '*'
Full hostname for 'beale.cse.rl.ac.uk' is 'beale.cse.rl.ac.uk'
Full hostname for 'delves.cse.rl.ac.uk' is 'delves.cse.rl.ac.uk'
No key table entry found for DELVES$@CSE.RL.AC.UK while getting keytab entry for 'DELVES$@'
No key table entry found for <email address hidden> while getting keytab entry for 'root/delves.cse.rl.ac.uk@'
Success getting keytab entry for 'nfs/delves.cse.rl.ac.uk@'
Successfully obtained machine credentials for principal '<email address hidden>' stored in ccache 'FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK'
INFO: Credentials in CC 'FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK' are good until 1400526145
using FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK as credentials cache for machine creds
using environment variable to select krb5 ccache FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK
creating context using fsuid 0 (save_uid 0)
creating tcp client for server beale.cse.rl.ac.uk
DEBUG: port already set to 2049
creating context with server <email address hidden>
DEBUG: serialize_krb5_ctx: lucid version!
prepare_krb5_rfc4121_buffer: protocol 1
prepare_krb5_rfc4121_buffer: serializing key with enctype 18 and size 32
ERROR: GSS-API: error in gss_free_lucid_sec_context(): GSS_S_NO_CONTEXT (No context has been established) - Unknown error
WARN: failed to free lucid sec context
doing downcall lifetime_rec 35999
handling gssd upcall (/run/rpc_pipefs/nfs/clnt56)
handle_gssd_upcall: 'mech=krb5 uid=0 enctypes=18,17,16,23,3,1,2 '
handling krb5 upcall (/run/rpc_pipefs/nfs/clnt56)
process_krb5_upcall: service is '<null>'
Full hostname for 'beale.cse.rl.ac.uk' is 'beale.cse.rl.ac.uk'
Full hostname for 'delves.cse.rl.ac.uk' is 'delves.cse.rl.ac.uk'
No key table entry found for DELVES$@CSE.RL.AC.UK while getting keytab entry for 'DELVES$@'
No key table entry found for <email address hidden> while getting keytab entry for 'root/delves.cse.rl.ac.uk@'
Success getting keytab entry for 'nfs/delves.cse.rl.ac.uk@'
INFO: Credentials in CC 'FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK' are good until 1400526145
INFO: Credentials in CC 'FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK' are good until 1400526145
using FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK as credentials cache for machine creds
using environment variable to select krb5 ccache FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK
creating context using fsuid 0 (save_uid 0)
creating tcp client for server beale.cse.rl.ac.uk
DEBUG: port already set to 2049
creating context with server <email address hidden>
DEBUG: serialize_krb5_ctx: lucid version!
prepare_krb5_rfc4121_buffer: protocol 1
prepare_krb5_rfc4121_buffer: serializing key with enctype 18 and size 32
ERROR: GSS-API: error in gss_free_lucid_sec_context(): GSS_S_NO_CONTEXT (No context has been established) - Unknown error
WARN: failed to free lucid sec context
doing downcall lifetime_rec 35999
handling gssd upcall (/run/rpc_pipefs/nfs/clnt56)
handle_gssd_upcall: 'mech=krb5 uid=0 enctypes=18,17,16,23,3,1,2 '
handling krb5 upcall (/run/rpc_pipefs/nfs/clnt56)
process_krb5_upcall: service is '<null>'
Full hostname for 'beale.cse.rl.ac.uk' is 'beale.cse.rl.ac.uk'
Full hostname for 'delves.cse.rl.ac.uk' is 'delves.cse.rl.ac.uk'
No key table entry found for DELVES$@CSE.RL.AC.UK while getting keytab entry for 'DELVES$@'
No key table entry found for <email address hidden> while getting keytab entry for 'root/delves.cse.rl.ac.uk@'
Success getting keytab entry for 'nfs/delves.cse.rl.ac.uk@'
INFO: Credentials in CC 'FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK' are good until 1400526145
INFO: Credentials in CC 'FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK' are good until 1400526145
using FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK as credentials cache for machine creds
using environment variable to select krb5 ccache FILE:/tmp/krb5ccmachine_CSE.RL.AC.UK
creating context using fsuid 0 (save_uid 0)
creating tcp client for server beale.cse.rl.ac.uk
DEBUG: port already set to 2049
creating context with server <email address hidden>
DEBUG: serialize_krb5_ctx: lucid version!
prepare_krb5_rfc4121_buffer: protocol 1
prepare_krb5_rfc4121_buffer: serializing key with enctype 18 and size 32
ERROR: GSS-API: error in gss_free_lucid_sec_context(): GSS_S_NO_CONTEXT (No context has been established) - Unknown error
WARN: failed to free lucid sec context
doing downcall lifetime_rec 35999
handling gssd upcall (/run/rpc_pipefs/nfs/clnt56)
handle_gssd_upcall: 'mech=krb5 uid=28891 enctypes=18,17,16,23,3,1,2 '
handling krb5 upcall (/run/rpc_pipefs/nfs/clnt56)
process_krb5_upcall: service is '<null>'
ERROR: GSS-API: error in gss_acquire_cred(): GSS_S_FAILURE (Unspecified GSS failure. Minor code may provide more information) - Can't find client principal <email address hidden> in cache collection
getting credentials for client with uid 28891 for server beale.cse.rl.ac.uk
CC '/tmp/krb5cc_28891' being considered, with preferred realm 'CSE.RL.AC.UK'
CC 'FILE:/tmp/krb5cc_28891'(<email address hidden>) passed all checks and has mtime of 1400489345
CC '/tmp/krb5ccmachine_CSE.RL.AC.UK' being considered, with preferred realm 'CSE.RL.AC.UK'
CC '/tmp/krb5ccmachine_CSE.RL.AC.UK' owned by 0, not 28891
using FILE:/tmp/krb5cc_28891 as credentials cache for client with uid 28891 for server beale.cse.rl.ac.uk
using environment variable to select krb5 ccache FILE:/tmp/krb5cc_28891
creating context using fsuid 28891 (save_uid 0)
creating tcp client for server beale.cse.rl.ac.uk
DEBUG: port already set to 2049
creating context with server <email address hidden>
DEBUG: serialize_krb5_ctx: lucid version!
prepare_krb5_rfc4121_buffer: protocol 1
prepare_krb5_rfc4121_buffer: serializing key with enctype 18 and size 32
ERROR: GSS-API: error in gss_free_lucid_sec_context(): GSS_S_NO_CONTEXT (No context has been established) - Unknown error
WARN: failed to free lucid sec context
doing downcall lifetime_rec 35194
handling gssd upcall (/run/rpc_pipefs/nfs/clnt56)
handle_gssd_upcall: 'mech=krb5 uid=28891 enctypes=18,17,16,23,3,1,2 '
handling krb5 upcall (/run/rpc_pipefs/nfs/clnt56)
process_krb5_upcall: service is '<null>'
creating context using fsuid 28891 (save_uid 0)
creating tcp client for server beale.cse.rl.ac.uk
DEBUG: port already set to 2049
creating context with server <email address hidden>
DEBUG: serialize_krb5_ctx: lucid version!
prepare_krb5_rfc4121_buffer: protocol 1
prepare_krb5_rfc4121_buffer: serializing key with enctype 18 and size 32
ERROR: GSS-API: error in gss_free_lucid_sec_context(): GSS_S_NO_CONTEXT (No context has been established) - Unknown error
WARN: failed to free lucid sec context