While installing HDP on Windows Server2012 R2, it gives me the following error: java.lang.Exception: Could not connect to the database: com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host MDNJAPP02, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.". ... View more