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From an original report: An expired Kerberos credentials cache causes GSSAPI krb5_gss_inquire_cred() to fail with the error GSS_S_CREDENTIALS_EXPIRED. This prevents SPNEGO from attempting authentication with plugin mechanisms configured in /etc/gss/mech.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2016-2591.html