Those errors come from GSSAPI/Kerberos APIs, they are not originated directly by the server.
You can use environment variable KRB5_TRACE as described in https://web.mit.edu/kerberos/krb5-latest/doc/admin/troubleshoot.html to see more output. Set it before you start up the server.
You can also use strace maybe, or a look for usual suspects (does mysql user have read access to keytab, does the keytab exist). You can also use private keytab if this is more convenient for you.
However, whenever I try to start Maria DB I get the followingI am trying to setup MariaDB 10 with GSSAPI support.I following the instructions here: https://mariadb.com/kb/en/mariadb/gssapi-authentication- plugin/
[Warning] mysqld: GSSAPI plugin : default principal 'mariadb/hostname.tld@REALM' not found in keytab
[ERROR] mysqld: Server GSSAPI error (major 851968, minor 2529639093) : gss_acquire_cred failed -Unspecified GSS failure. Minor code may provide more information. Keytab FILE:/etc/krb5.keytab is nonexistent or empty.
[ERROR] Plugin 'gssapi' init function returned error.
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