I had same issue with not successful login via PAM. I couldn’t fix it and just switched to anonymous mode. My environment is CDH 7.1.4 trial on VirtualBox CentOS 7.8.2003 .   Stop Zeppelin before configuration amendment. 1. zeppelin.anonymous.allowed new value true. 2. in the block zeppelin.shiro.user.block add new user admin = admin, admin 3. comment PAM configuration on zeppelin.shiro.main.block 4. in the block zeppelin.shiro.roles.block new role admin = * 5. in the block zeppelin.shiro.urls.block value /** = authc is changed into /** = anon Save configuration and start Zeppelin service. ... View more