We stopped all the services and rebooted every host in our cluster in order to do maintenance for another reason and surprisingly, Ambari stopped complaining. The aggregate alert shows the correct total count now. ... View more

@Geoffrey Shelton Okot Thanks for your response, but I am still very confused. I tried creating a keystore from the Let's Encrypt PEM file: sudo keytool -import -file /etc/letsencrypt/live/mydomain.com/fullchain.pem -alias mydomain -keystore mydomain-keystore.jks And assigned a password to it: PASSWORD I then set: zeppelin.ssl = true zeppelin.ssl.key.manager.password = PASSWORD (I didn't know what to put here?!?) zeppelin.ssl.keystore.password = PASSWORD zeppelin.ssl.keystore.path = /etc/ssl/mydomain-keystore.jks I left the other ssl settings as the default values, but the Zeppelin webpage was no longer accessible. I turned zeppelin.ssl = false in order to get it working again. In the zeppelin log, I couldn't find any abnormal messages indicating why the SSL settings are not working. If the keystore.path is wrong, I can see an error for that, but after fixing the path and permissions, Zeppelin still won't work properly. So I really don't know what to do. ... View more