I'm following this tutorial. At step A4j, when I click "Test Connection", I got an error message as attached.
The test connection operation failed for data source Order DS on server server1 at node xxxxx with the following exception: java.sql.SQLException: java.net.ConnectException : Error opening socket to server localhost on port 1527 with message : Connection refused: connectDSRA0010E: SQL State = null, Error Code = -4,499. View JVM logs for further details.
Then I went to open 1527 port, but still the same error message. Any idea?