https://community.cloudera.com/t5/Support-Questions/Ambari-Setup-JAVA-HOME-Error/m-p/215688#M177598 <P>Thanks a lot, your suggestion really worked. Now i have made the ambari-server setup successfully.</P><P>ambari-server setup </P><P>Using python /usr/bin/python Setup ambari-server Checking SELinux... </P><P>SELinux status is 'disabled' Customize user account for ambari-server daemon [y/n] (n)? n </P><P>Adjusting ambari-server permissions and ownership... </P><P>Checking firewall status... </P><P>Checking JDK... </P><P>Do you want to change Oracle JDK [y/n] (n)? n </P><P>Completing setup... </P><P>Configuring database... </P><P>Enter advanced database configuration [y/n] (n)? n </P><P>Configuring database...</P><P>Default properties detected. Using built-in database. </P><P>Configuring ambari database... </P><P>Checking PostgreSQL... </P><P>Configuring local database... </P><P>Configuring PostgreSQL... </P><P>Backup for pg_hba found, reconfiguration not required Creating schema and user... done. </P><P>Creating tables... done. </P><P>Extracting system views... ambari-admin-2.6.0.0.267.jar ........... </P><P>Adjusting ambari-server permissions and ownership... </P><P>Ambari Server 'setup' completed successfully.</P> Thu, 07 Jun 2018 13:55:23 GMT khsabarish 2018-06-07T13:55:23Z