@Rah It's worth to check if you have TLS enabled installation. I see a note in doc which needs out attention. If you have enabled Auto-TLS, you must include the Cloudera Manager server host when you specify hosts.  https://docs.cloudera.com/cdpdc/7.0/installation/topics/cdpdc-install-runtime-using-wizard.html   Did you restart CM after disabling TLS? Also, when you are using the add host wizard, you do not want to set use_tls=1 until the host is successfully added. It is actually kind of a messy procedure: 1. Disable Use TLS Encryption for Agents, and Use TLS Authentication of Agents to Server. 2. Restart CM 3. Add host to CM 4. Turn on Use TLS Encryption for Agents, and Use TLS Authentication of Agents to Server. 5. Configure agent to use TLS (setting use_tls=1 and the cert/key parameters, or copy config.ini from another host with TLS enabled). 6. Restart agent Alternatives: Use Auto-TLS introduced in C6 Follow the "Alternate Method of installing Cloudera Manager Agent without Disabling TLS" steps instead. If above does not help then we need full log file from CM server to take a look.   Cheers, ... View more