I'm not able to start ambari server

[#1]

I'm not able to start ambari server, it is failing with below error :

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 

[#2 · Accepted solution]

Can you please check if the postgresql service is running on ambari server (if you are running default embedded database for ambari)

# service postgresql status

# netstat -ntpl | grep 5432

If not please start postgresql and then try to start ambari-server