Bug on kerberos-plugin-1.0.1.jar

When i configuration authentication use kerberos by using plugin, Class KerberosAuthenticationInfo in jar file of plugin reset value of credentials array at doCredentialsMatch, Log error: ERROR : failed to log in: invalid principal or credentials (Submitted credentials for token [{ scheme='kerberos', principal='', credentials='******', user_agent='neo4j-java/1.7.5-d56154a7e96ff71615b894ee9a15d08c370691e6' }] did not match the expected credentials.). Please fix bug or another configuration pass error?