https://community.cloudera.com/t5/Archives-of-Support-Questions/I-m-not-able-to-start-ambari-server/m-p/173681#M58053 <P>I'm not able to start ambari server, it is failing with below error : </P><PRE>Internal Exception: org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections. Error Code: 0 </PRE> Fri, 24 Mar 2017 21:54:32 GMT rbansal 2017-03-24T21:54:32Z https://community.cloudera.com/t5/Archives-of-Support-Questions/I-m-not-able-to-start-ambari-server/m-p/173681#M58053 <P>I'm not able to start ambari server, it is failing with below error : </P><PRE>Internal Exception: org.postgresql.util.PSQLException: Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections. Error Code: 0 </PRE> Fri, 24 Mar 2017 21:54:32 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/I-m-not-able-to-start-ambari-server/m-p/173681#M58053 rbansal 2017-03-24T21:54:32Z https://community.cloudera.com/t5/Archives-of-Support-Questions/I-m-not-able-to-start-ambari-server/m-p/173682#M58054 <P>Can you please check if the postgresql service is running on ambari server (if you are running default embedded database for ambari)</P><P># service postgresql status </P><P># netstat -ntpl | grep 5432 </P><P>If not please start postgresql and then try to start ambari-server</P> Fri, 24 Mar 2017 21:56:40 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/I-m-not-able-to-start-ambari-server/m-p/173682#M58054 krajguru 2017-03-24T21:56:40Z