We get the following warning in our logs.
2011-12-06 10:58:01,957 WARN - Could not find the attribute '' in LDAP
2011-12-06 10:58:02,035 WARN - Could not find the attribute '' in LDAP
2011-12-06 10:58:02,117 WARN - Could not find the attribute '' in LDAP
2011-12-06 10:58:02,228 WARN - Could not find the attribute '' in LDAP
2011-12-06 10:58:02,302 WARN - Could not find the attribute '' in LDAP
Is it a known warning?
If so, are possible causes known?