Exception in thread "main" org.postgresql.util.PSQLException: Connection refused. Check that the hostname a                                                   nd port are correct and that the postmaster is accepting TCP/IP connections.
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:122)
        at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:65)
        at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:116)
        at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
        at org.postgresql.jdbc3.Jdbc3Connection.<init>(Jdbc3Connection.java:24)
        at org.postgresql.Driver.makeConnection(Driver.java:369)
        at org.postgresql.Driver.connect(Driver.java:245)
        at java.sql.DriverManager.getConnection(DriverManager.java:525)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at org.opennms.install.Installer.databaseConnect(Installer.java:700)
        at org.opennms.install.Installer.install(Installer.java:281)
        at org.opennms.install.Installer.main(Installer.java:2673)
Caused by: java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:516)
        at java.net.Socket.connect(Socket.java:466)
        at java.net.Socket.<init>(Socket.java:366)
        at java.net.Socket.<init>(Socket.java:179)
        at org.postgresql.core.PGStream.<init>(PGStream.java:60)
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:77)
        ... 11 more