Is this a kerberos enabled cluster? Also did you configure the oozie proxy user? https://oozie.apache.org/docs/3.2.0-incubating/AG_Install.html#User_ProxyUser_Configuration ... View more

So JDBC ships with Ambari server be default I believe. look into /var/lib/ambari-server/resoruces you will find the JDBC there I believe If not use this page to down the JDBC https://jdbc.postgresql.org/download.html ... View more

Can you install Ambari agent on those machines? Or any package from your repo ... View more

Can you check if you can SSH from the Ambari Server to the Agents? You might have some DNS issues or it is not able to SSH ... View more