BUG #13521: refused connection to host and port

The following bug has been logged on the website:

Bug reference:      13521
Logged by:          guestUser
Email address:      adfuser321@gmail.com
PostgreSQL version: 9.4.4
Operating system:   Linux
Description:

Hi,

Trying to connect to Postgresql database running on remote machine using
jdeveloper.

Using 8.1 jdbc driver and exception noticed is below, tried latest and old
driver for all the drivers it gives same error.

Test failed: Connection refused. Check that the hostname and port are
correct and that the postmaster is accepting TCP/IP connections.
Exception: java.net.ConnectException: Connection refused
Stack Trace:
java.net.ConnectException: Connection refused
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
    at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
    at java.net.Socket.connect(Socket.java:529)
    at java.net.Socket.connect(Socket.java:478)
    at java.net.Socket.<init>(Socket.java:375)
    at java.net.Socket.<init>(Socket.java:189)
    at org.postgresql.core.PGStream.<init>(PGStream.java:60)
    at
org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:77)
    at
org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:65)
    at
org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:116)
    at org.postgresql.jdbc2.Jdbc2Connection.<init>(Jdbc2Connection.java:24)
    at org.postgresql.Driver.makeConnection(Driver.java:369)
    at org.postgresql.Driver.connect(Driver.java:245)
    at
oracle.jdeveloper.db.adapter.AbstractConnectionCreator.getConnection(AbstractConnectionCreator.java:172)
    at sun.reflect.GeneratedMethodAccessor272.invoke(Unknown Source)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at
oracle.jdevimpl.db.extension.DatabaseConnectionHook$ConnectionType$1.invoke(DatabaseConnectionHook.java:205)
    at $Proxy2.getConnection(Unknown Source)
    at
oracle.jdeveloper.db.adapter.DatabaseProvider.getConnection(DatabaseProvider.java:331)
    at
oracle.jdeveloper.db.adapter.DatabaseProvider.getConnection(DatabaseProvider.java:260)
    at
oracle.jdeveloper.db.DatabaseConnections.testConnection(DatabaseConnections.java:1077)
    at
oracle.jdevimpl.db.panels.ConnectionEditorPanel$ConnectionTester.doWork(ConnectionEditorPanel.java:749)
    at oracle.ide.dialogs.ProgressRunnable.run(ProgressRunnable.java:161)
    at oracle.ide.dialogs.ProgressBar.run(ProgressBar.java:655)
    at java.lang.Thread.run(Thread.java:662)
End of Stack Trace