To verify that the Derby Network Server is currently running, use the ping command.

• You can use the scripts NetworkServerControl.bat for Windows systems or NetworkServerControl.ksh for UNIX systems with the ping command. For example:

  NetworkServerControl ping [-h <hostname>;] [-p <portnumber>]

• You can use the NetworkServerControl command:

  java org.apache.derby.drda.NetworkServerControl
     ping [-h <hostname>] [-p <portnumber>] 

• You can use the NetworkServerControl API to verify startup from within a Java application:

  ping(); 

private static boolean isServerStarted(NetworkServerControl server, int ntries)
	{
		for (int i = 1; i <= ntries; i ++)
		{
			try {
				Thread.sleep(500);
				server.ping();
				return true;
			}
			catch (Exception e) {
				if (i == ntries)
					return false;
			}
		}
		return false;
	}