[krbdev.mit.edu #8165] [krb5bug] Kerberos ticket expired error with lifetime remaining

[Roland Mainz via RT]

Hi!

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[More or less the same as Redhat bug #1208553 ("Kerberos ticket expired error with lifetime remaining")]
Kerberos TGTs with a short lifetime (<3 minutes) give problems obtaining tickets. The problem seems to be worse in krb5-1.12.x (compared to krb5-1.10.x), with a significant threshold around 120 seconds (with a TGT lifetime of 120s or less, obtaining a ticket fails 90% of the time, with a lifetime of 121s it succeeds 90% of the time, with 126s it succeeds ~100%).

Steps to Reproduce:
1. kinit -l 120s -k -t <keytab> <principal> && kvno 'host/<host>'

Actual results:
kvno: Ticket expired while getting credentials for host/<host>@<domain>

Expected results:
host/<host>@<domain>: kvno = 3


Additional info:
Time difference with the KDC is less than 0.1 seconds.
I also see the problem with krb5-1.10.x, but with much less pronounced 120s threshold.

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Bye,
Roland

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