@MEFTAH1997 Kindly share the zeppelin logs for the timeframe when login failed.    Also check if you are hitting the same issue as below.  https://community.cloudera.com/t5/Customer/ERROR-quot-org-apache-shiro-authc-AuthenticationException/ta-p/319320   Solution:  To resolve this issue you can try the below steps. ------ usermod -a -G shadow zeppelin chgrp shadow /etc/shadow chmod 040 /etc/shadow rm -f /var/run/nologin ----- If you found that the provided solution(s) assisted you with your query, please take a moment to login and click Accept as Solution below each response that helped. ... View more