Labwindows tcp client to generic server

I made a program fom the client sample in the TCP sample folder. Now I want that program to communicate to a generic server that doesn't have labwindows running on it. Is this possible with just a few minor edits or do I need to start from scratch with a different sample program?
Solved!
Go to Solution.

I see, but I can't understand why it reports no error! The macro exits for return value <0: if directly passed to GetTCPErrorString should not return a "no error" string, neither should GetTCPSystemErrorString do.
Are you sure you are not calling any other TCP library function before decoding the error? If this other function succeeds, it masks out the previous error.
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Similar Messages

TCP client server sample

All,
This may not really be a LabWindows/CVI question but I'm really stuck on what should be easy to
solve. The brain trust here on the forums has always been helpful so I'll try to explain.
The project:
Get LabWindows/CVI code talking to a muRata SN8200 embedded WiFi module.
The setup:
(running Labwindows/CVI 2009)
Computer 1 -- (with a wireless NiC) running simple demo TCP server program provided by muRata.
Computer 2 -- USB connection (virtual COM port) with simple program (also provided by muRata) that talks to the SN8200 embedded WiFi module. This code along with the module creates a simple TCP client.
Whats working:
I can successfuly get the Computer 2 client connected to and talking to the Computer 1 server. (using the muRata supplied code)
I can also run the LabWindows/CVI sample code from (\CVI2009\samples\tcp), server on computer 1 & client on computer 2 and they talk with no problems.
(I'm using the same IP addresses and port numbers in all cases)
Whats NOT working:
Run the CVI server program on computer 1.
I cannot get the muRata client program to connect to the CVI server.
I also tried get the CVI client program to connect to the muRata server. No luck that way either. The CVI client sample program trys connect, and this function call:
ConnectToTCPServer (&g_hconversation, portNum, tempBuf, ClientTCPCB, NULL, 5000 );
returns with a timeout error code (-11).
What I need:
Some ideas on how to get this working.
Is there something unique about the LabWindows/CVI sample client/server demo code that would make them incompatible with the muRata code?
Can you think of some ways I can debug this further? I feel like I'm kind of running blind.
What else can I look at?
For those that have read this far, thanks much and any ideas or comments will be appreciated,
Kirk

Humphrey,
First,
I just figured out what the problem is:
When I was trying to use the CVI sample server I was entering the wrong port number.
The reason I entered the wrong port was because the hard-coded port number in the muRata demo code was displayed in hex as 0x9069. ( I converted this to decimal and entered it into the CVI sample server code) The correct port number was 0x6990. (upper and lower bytes swapped) Arrgh!
I found the problem by using the netstat command line utility to display the connections and noted that the port being used was not 0x9069. It is really a problem with the muRata eval kit demo code.
Second,
Humphrey you are right about the CVI sample code not handling all the muRata commands for the client end of the connection that communicates with the SN8200 module. For my test I was using the muRata code for that "end".
The server end is simple and the CVI sample is adequate and is now working.
Thank you to all who took the time to browse my questions,
Kirk

Async tcp client and server. How can I determine that the client or the server is no longer available?

Hello. I would like to write async tcp client and server. I wrote this code but a have a problem, when I call the disconnect method on client or stop method on server. I can't identify that the client or the server is no longer connected.
I thought I will get an exception if the client or the server is not available but this is not happening.
private async void Process()
try
while (true)
var data = await this.Receive();
this.NewMessage.SafeInvoke(Encoding.ASCII.GetString(data));
catch (Exception exception)
How can I determine that the client or the server is no longer available?
Server
public class Server
private readonly Dictionary<IPEndPoint, TcpClient> clients = new Dictionary<IPEndPoint, TcpClient>();
private readonly List<CancellationTokenSource> cancellationTokens = new List<CancellationTokenSource>();
private TcpListener tcpListener;
private bool isStarted;
public event Action<string> NewMessage;
public async Task Start(int port)
this.tcpListener = TcpListener.Create(port);
this.tcpListener.Start();
this.isStarted = true;
while (this.isStarted)
var tcpClient = await this.tcpListener.AcceptTcpClientAsync();
var cts = new CancellationTokenSource();
this.cancellationTokens.Add(cts);
await Task.Factory.StartNew(() => this.Process(cts.Token, tcpClient), cts.Token, TaskCreationOptions.LongRunning, TaskScheduler.Default);
public void Stop()
this.isStarted = false;
foreach (var cancellationTokenSource in this.cancellationTokens)
cancellationTokenSource.Cancel();
foreach (var tcpClient in this.clients.Values)
tcpClient.GetStream().Close();
tcpClient.Close();
this.clients.Clear();
public async Task SendMessage(string message, IPEndPoint endPoint)
try
var tcpClient = this.clients[endPoint];
await this.Send(tcpClient.GetStream(), Encoding.ASCII.GetBytes(message));
catch (Exception exception)
private async Task Process(CancellationToken cancellationToken, TcpClient tcpClient)
try
var stream = tcpClient.GetStream();
this.clients.Add((IPEndPoint)tcpClient.Client.RemoteEndPoint, tcpClient);
while (!cancellationToken.IsCancellationRequested)
var data = await this.Receive(stream);
this.NewMessage.SafeInvoke(Encoding.ASCII.GetString(data));
catch (Exception exception)
private async Task Send(NetworkStream stream, byte[] buf)
await stream.WriteAsync(BitConverter.GetBytes(buf.Length), 0, 4);
await stream.WriteAsync(buf, 0, buf.Length);
private async Task<byte[]> Receive(NetworkStream stream)
var lengthBytes = new byte[4];
await stream.ReadAsync(lengthBytes, 0, 4);
var length = BitConverter.ToInt32(lengthBytes, 0);
var buf = new byte[length];
await stream.ReadAsync(buf, 0, buf.Length);
return buf;
Client
public class Client
private TcpClient tcpClient;
private NetworkStream stream;
public event Action<string> NewMessage;
public async void Connect(string host, int port)
try
this.tcpClient = new TcpClient();
await this.tcpClient.ConnectAsync(host, port);
this.stream = this.tcpClient.GetStream();
this.Process();
catch (Exception exception)
public void Disconnect()
try
this.stream.Close();
this.tcpClient.Close();
catch (Exception exception)
public async void SendMessage(string message)
try
await this.Send(Encoding.ASCII.GetBytes(message));
catch (Exception exception)
private async void Process()
try
while (true)
var data = await this.Receive();
this.NewMessage.SafeInvoke(Encoding.ASCII.GetString(data));
catch (Exception exception)
private async Task Send(byte[] buf)
await this.stream.WriteAsync(BitConverter.GetBytes(buf.Length), 0, 4);
await this.stream.WriteAsync(buf, 0, buf.Length);
private async Task<byte[]> Receive()
var lengthBytes = new byte[4];
await this.stream.ReadAsync(lengthBytes, 0, 4);
var length = BitConverter.ToInt32(lengthBytes, 0);
var buf = new byte[length];
await this.stream.ReadAsync(buf, 0, buf.Length);
return buf;

Hi,
Have you debug these two applications? Does it go into the catch exception block when you close the client or the server?
According to my test, it will throw an exception when the client or the server is closed, just log the exception message in the catch block and then you'll get it:
private async void Process()
try
while (true)
var data = await this.Receive();
this.NewMessage.Invoke(Encoding.ASCII.GetString(data));
catch (Exception exception)
Console.WriteLine(exception.Message);
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
By the way, I don't know what the SafeInvoke method is, it may be an extension method, right? I used Invoke instead to test it.
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TCP client communicating with UDP server

Hello,
I want to make a TCP client to communicate with an UDP server. Does anyone know a way of doing this? I am not interested in reliable data transfer. So I don't care if the datagram is lost. I want to make the UDP server accept some datagrams from the TCP client. Also, the datagram that I want to transmit is less than 65,536 octets so it is not devided to several datagrams. Therefore, only one exchange procedure occurs.
I made an UDP server using DatagramSocket and DatagramPacket classes and a TCP client using Socket class, but the TCP client informs me that the connection was refused.
Any ideas?

Let's google for IP header and the first hit is http://www.networksorcery.com/enp/protocol/ip.htm (Whoa! Classic page! I must have seen that back when googling was called altavista.)
There is a header field, a single byte, called protocol. For TCP/IP that field contains 6, for UDP/IP it contains 17.
If you send a packet with protocol=17, the receiving host's kernel will check if it has an process listening to UDP (17) at the port specified in the packet header. No such process? Then simply discard the packet. So you can't send an UDP packet to a TCP socket because the protocol field is wrong.
If you want to fake a TCP stream you could look into jpcap, which allows you to capture and send raw packets. Google for it; and pick the right jpcap, there are two, only one of which (AFAIK) can send packets. Attempting to write your own TCP implementation is highly advanced though, and not really practical.

Handle Received data of Multiple TCP clients on TCP Server by displaying them into Datagrid

Hello All,
I have developed a C# based TCP server GUI application which is accepting the data from multiple TCP clients on TCP server.
The data i am receiving from TCP clients is a 32 bit data. In my application multiple TCP client data goes like this:
00012331100025123000124510321562
01112563110002512456012451032125 and so on...
Now i want those data of the TCP clients to be parsed into 4 bits first and display it in 8 columns (32/4=8) of (say) datagrid as each 4 bit represents some characteristics of the TCP client. The same thing
should work for next TCP client on second row of datagrid.
Can you give me some suggestion or an example how to go about this? Any help would be appreciated.
Thank you in advance.
Here is my code for receiving data from multiple TCP clients.
void m_Terminal_MessageRecived(Socket socket, byte[] buffer)
string message = ConvertBytesToString(buffer, buffer.Length);
PublishMessage(listMessages, string.Format("Sockets: {0}", message));
// Send Echo
// m_ServerTerminal.DistributeMessage(buffer);
private string ConvertBytesToString(byte[] bytes, int iRx)
char[] chars = new char[iRx + 1];
System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
d.GetChars(bytes, 0, iRx, chars, 0);
string szData = new string(chars);
return szData;

Now i want those data of the TCP clients to be parsed into 4 bits first and display it in 8 columns (32/4=8) of (say) datagrid as each 4 bit represents some characteristics of the TCP client. The same thing
should work for next TCP client on second row of datagrid
If mean it's a Windows Forms application and you want to display those bits in a DataGridView control, then please see these threads:
Add row to datagridview
Programmatically add new row to DataGridView
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How to get the IP of the client when TCP connect in the server

How to get the IP of the client when TCP connect in the server.
The only parameter got from the connection is connectionID.
Solved!
Go to Solution.

I guess you're using "TCP Wait on Listener" on the server. This returns the remote address and port (as optional outputs).

Help with MIDlets - TCP client server program

Hi I am new to using MIDlets, and I wanted to create a simple TCP client server program.. I found a tutorial in J2me forums and I am able to send a single message from server(PC) to client(Phonemulator) and from client to server. But I want to send a stream of messages to the server. Here is my program and I am stuck in the last step wher i want to send lot of messages to server. Here is my program, Could any one of u tell me how to do it? Or where am i going wrong in thsi pgm?
Code:
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.SocketConnection;
import javax.microedition.io.StreamConnection;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeExcepti on;
public class SocketMIDlet extends MIDlet
implements CommandListener, Runnable {
private Display display;
private Form addressForm;
private Form connectForm;
private Form displayForm;
private TextField serverName;
private TextField serverPort;
private StringItem messageLabel;
private StringItem errorLabel;
private Command okCommand;
private Command exitCommand;
private Command backCommand;
protected void startApp() throws MIDletStateChangeException {
if (display == null) {
initialize();
display.setCurrent(addressForm);
protected void pauseApp() {
protected void destroyApp(boolean unconditional)
throws MIDletStateChangeException {
public void commandAction(Command cmd, Displayable d) {
if (cmd == okCommand) {
Thread t = new Thread(this);
t.start();
display.setCurrent(connectForm);
} else if (cmd == backCommand) {
display.setCurrent(addressForm);
} else if (cmd == exitCommand) {
try {
destroyApp(true);
} catch (MIDletStateChangeException ex) {
notifyDestroyed();
public void run() {
InputStream is = null;
OutputStream os = null;
StreamConnection socket = null;
try {
String server = serverName.getString();
String port = serverPort.getString();
String name = "socket://" + server + ":" + port;
socket = (StreamConnection)Connector.open(name, Connector.READ_WRITE);
} catch (Exception ex) {
Alert alert = new Alert("Invalid Address",
"The supplied address is invalid\n" +
"Please correct it and try again.", null,
AlertType.ERROR);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert, addressForm);
return;
try {
// Send a message to the server
String request = "Hello\n\n";
//StringBuffer b = new StringBuffer();
os = socket.openOutputStream();
//for (int i=0;i<10;i++)
os.write(request.getBytes());
os.close();
// Read the server's reply, up to a maximum
// of 128 bytes.
is = socket.openInputStream();
final int MAX_LENGTH = 128;
byte[] buf = new byte[MAX_LENGTH];
int total = 0;
while (total<=5)
int count = is.read(buf, total, MAX_LENGTH - total);
if (count < 0)
break;
total += count;
is.close();
String reply = new String(buf, 0, total);
messageLabel.setText(reply);
socket.close();
display.setCurrent(displayForm);
} catch (IOException ex) {
Alert alert = new Alert("I/O Error",
"An error occurred while communicating with the server.",
null, AlertType.ERROR);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert, addressForm);
return;
} finally {
// Close open streams and the socket
try {
if (is != null) {
is.close();
is = null;
} catch (IOException ex1) {
try {
if (os != null) {
os.close();
os = null;
} catch (IOException ex1) {
try {
if (socket != null) {
socket.close();
socket = null;
} catch (IOException ex1) {
private void initialize() {
display = Display.getDisplay(this);
// Commands
exitCommand = new Command("Exit", Command.EXIT, 0);
okCommand = new Command("OK", Command.OK, 0);
backCommand = new Command("Back", Command.BACK, 0);
// The address form
addressForm = new Form("Socket Client");
serverName = new TextField("Server name:", "", 256, TextField.ANY);
serverPort = new TextField("Server port:", "", 8, TextField.NUMERIC);
addressForm.append(serverName);
addressForm.append(serverPort);
addressForm.addCommand(okCommand);
addressForm.addCommand(exitCommand);
addressForm.setCommandListener(this);
// The connect form
connectForm = new Form("Connecting");
messageLabel = new StringItem(null, "Connecting...\nPlease wait.");
connectForm.append(messageLabel);
connectForm.addCommand(backCommand);
connectForm.setCommandListener(this);
// The display form
displayForm = new Form("Server Reply");
messageLabel = new StringItem(null, null);
displayForm.append(messageLabel);
displayForm.addCommand(backCommand);
displayForm.setCommandListener(this);

Hello all,
I was wondering if someone found a solution to this..I would really appreciate it if u could post one...Thanks a lot..Cheerz

TCP Client - Server Prog.

Hi All,
I have posted TCP client- server prog. I have trouble in client code. When i'm running the server code on some port and the running the client code on the same port, then client is sending message to server(in this case integers with space like 12 22 23) , the server is receiving the message and adding the sum and sending the sum to client, but when i'm trying to read the stream from server(i.e the sum), i'm getting nothing.........
please run the code and check.......u can understand well....
please reply me as soon as possible.
Thanks
import java.io.*;
import java.net.*;
class TCPAdditionClient
     public static void main(String args[]) throws Exception
     {   Character ans = null;
          String hostname="localhost";
          String sentence;
          String result;
          int port=0;
          if (args.length > 0) {
          try {
          port = Integer.parseInt(args[0]);
          } catch (NumberFormatException e) {
          System.err.println("Argument must be an integer");
          System.exit(1);
          Socket clientSocket = new Socket(hostname,port);
          do
               System.out.println("Enter the number of integers....");
               BufferedReader fromUser = new BufferedReader(new InputStreamReader(System.in));
               sentence = fromUser.readLine();
               DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
               //System.in.read();
               outToServer.writeBytes(sentence + '\n');
               System.out.println("server sends message");
               BufferedReader fromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
               System.out.println(fromServer);
               result = fromServer.readLine();
               System.out.println("from Server" + result);
               System.out.println("Do u want to continue y/n");
          }while(! ans.equals("n"));
          clientSocket.close();
import java.io.*;
import java.util.*;
import java.net.*;
class TCPAdditionServer
     public static void main(String args[]) throws Exception
          String clientSentence;
          int port=0;
          if (args.length > 0) {
          try {
          port = Integer.parseInt(args[0]);
          } catch (NumberFormatException e) {
          System.err.println("Argument must be an integer");
          System.exit(1);
          ServerSocket welcomeSocket = new ServerSocket(port);
          while(true)
               int sum = 0,total_sum = 0;
               Socket connectionSocket = welcomeSocket.accept();
               BufferedReader fromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
               DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
               clientSentence = fromClient.readLine();
               System.out.println(clientSentence);
               String[] result = clientSentence.split(" ");
               for (int x=0; x<result.length; x++)
                    sum = Integer.parseInt(result[x]);
                    total_sum = sum + total_sum;
                    System.out.println(total_sum);
               String sendData = "from the server" + "sum :" + total_sum;
               System.out.println(sendData);
               outToClient.writeBytes(sendData);
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------

can u explain it http://www.catb.org/~esr/faqs/smart-questions.html#writewell
How To Ask Questions The Smart Way
Eric Steven Raymond
Rick Moen
Write in clear, grammatical, correctly-spelled language
We've found by experience that people who are careless and sloppy writers are usually also careless and sloppy at thinking and coding (often enough to bet on, anyway). Answering questions for careless and sloppy thinkers is not rewarding; we'd rather spend our time elsewhere.
So expressing your question clearly and well is important. If you can't be bothered to do that, we can't be bothered to pay attention. Spend the extra effort to polish your language. It doesn't have to be stiff or formal - in fact, hacker culture values informal, slangy and humorous language used with precision. But it has to be precise; there has to be some indication that you're thinking and paying attention.
Spell, punctuate, and capitalize correctly. Don't confuse "its" with "it's", "loose" with "lose", or "discrete" with "discreet". Don't TYPE IN ALL CAPS; this is read as shouting and considered rude. (All-smalls is only slightly less annoying, as it's difficult to read. Alan Cox can get away with it, but you can't.)
More generally, if you write like a semi-literate b o o b you will very likely be ignored. So don't use instant-messaging shortcuts. Spelling "you" as "u" makes you look like a semi-literate b o o b to save two entire keystrokes.

TCP client and TCP server...

i m doing a project in GUI form, where the client need to enter data in text field and the data will be pass to server to process, for example if client click button "ADD" then a particular data will pass to server and do sth (save data into a file), or if client click button "DELETE", the client is actually call server to delete a particular file stored in server, how can i do it using TCP socket ??

Hi,
Have you debug these two applications? Does it go into the catch exception block when you close the client or the server?
According to my test, it will throw an exception when the client or the server is closed, just log the exception message in the catch block and then you'll get it:
private async void Process()
try
while (true)
var data = await this.Receive();
this.NewMessage.Invoke(Encoding.ASCII.GetString(data));
catch (Exception exception)
Console.WriteLine(exception.Message);
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
By the way, I don't know what the SafeInvoke method is, it may be an extension method, right? I used Invoke instead to test it.
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Extend TCP- clients Failover

Hi,
In an attempt to failover a TCP client we had the following config file which setup with the following elements
               <heartbeat-interval>50s</heartbeat-interval>
               <heartbeat-timeout>35s</heartbeat-timeout>
When inserting the event handler for the service stopping with the following code
public static void InstallServiceEventHandler(string servicename, ServiceEventHandler eh) //this should be a generic handler in
Tangosol.Net.IService ics = CacheFactory.GetService(servicename); -->This line throws
try{
ics.ServiceStopping += eh;
catch (Exception e)
log.Error("Exception in the service Event handler insertion", e);
return;
The Exception is
{"The element 'outgoing-message-handler' in namespace 'http://schemas.tangosol.com/cache' has *invalid* child element 'heartbeat-interval' in namespace 'http://schemas.tangosol.com/cache'."}
On commenting out the hearbeat* lines the above line executes....Which is of course useless to detect Server failures without a heartbeat.
What are we doing wrong?
Thanks,
Vipin
Given below is the
<cache-config xmlns="http://schemas.tangosol.com/cache">
<caching-scheme-mapping>
<cache-mapping>
<cache-name>dist-*</cache-name>
<scheme-name>extend-direct</scheme-name>
</cache-mapping>
</caching-scheme-mapping>
<caching-schemes>
<remote-cache-scheme>
<scheme-name>extend-direct</scheme-name>
<service-name>ExtendTcpCacheService</service-name>
<initiator-config>
<tcp-initiator>
<remote-addresses>
          <socket-address>
<address>nycs00057388.us.net.intra</address>
<port>8078</port>
</socket-address>
               <socket-address>
                    <address>nycs00057389.us.net.intra</address>
                    <port>8078</port>
               </socket-address>
          </remote-addresses>
</tcp-initiator>
<outgoing-message-handler>
<request-timeout>30s</request-timeout>
               <heartbeat-interval>50s</heartbeat-interval>
               <heartbeat-timeout>35s</heartbeat-timeout>
          </outgoing-message-handler>
</initiator-config>
</remote-cache-scheme>
<remote-invocation-scheme>
<scheme-name>extend-invocation</scheme-name>
<service-name>ExtendTcpInvocationService</service-name>
<initiator-config>
<tcp-initiator>
<remote-addresses>
<socket-address>
<address>nycs00057388.us.net.intra</address>
<port>8078</port>
</socket-address>
</remote-addresses>
</tcp-initiator>
<outgoing-message-handler>

</outgoing-message-handler>
</initiator-config>
</remote-invocation-scheme>
</caching-schemes>
</cache-config>

Hi Vipin -
While I do not have a definite answer on the issue, the internal tracking number is COH-2534. While I cannot commit on dates, at last check it was being worked on for inclusion in 3.6, and the fix would likely be back-ported to 3.5.x.
I suggest that you open an SR with Oracle Support if you have not already done so, so that you can specifically request the resolution of this and the backport to 3.5.
I apologize for the inconvenience that this has caused you.
Peace,
Cameron Purdy | Oracle Coherence

ORA-03113 while connect from 8i client to 7 Server

Hi,
I have a Oracle 7.3.3 Server running on a SCO OpenSever 5.0.5 and a Oracle 8i Client 8.1.6.0.0 on a RedHat Linux 6.2.
When I try to connect from the client to the server by issue command "sqlplus user@test", it responses me "Error while trying to retrieve text for error ORA-03113". But when I run "netasst" to test the connection, it says the connection was sucessful.
Can anyone help? Here are my configuration files:
Listener.ora on Server side:
LISTENER=
(ADDRESS LIST=
(ADDRESS =
(COMMUNITY=TCP.world)
(PROTOCOL=TCP)
(Host=10.128.64.52)
(Port=1526)
STARTUP_WAIT_TIME_LISTENER = 0
CONNECT_TIMEOUT_LISTENER = 10
TRACE_LEVEL_LISTENER = OFF
SID_LIST_LISTENER =
(SID_LIST=
(SID_DESC =
(SID_NAME = test)
(ORACLE_HOME = /usr/app/oracle/product/7.3.3
(PRESPAWN_MAX=10)
tnsnames.ora on client side:
TEST.888.COM
(DESCRIPTION =
(ADDRESS_LISTS =
(ADDRESS =
(PROTOCOL = TCP)
(HOST = 10.128.64.52)
(PORT = 1526)
(CONNECT_DATA =
(SID = test)
)

Hi,
I don't have a 64 bit instance, but maybe another test will be usefull, try to get a connection with sqlplus on the server but via sqlnet like "user/passwd@tnsentry" I think if that also is not possible it is not the 64 bit issue but more that the listener itself coundn't etsablish a db connection, be aware tnsping is only testing if the listener is running and do not check if the listener is able to connect to the db.
Hope this helps a little to find your real proble ;-), Olaf

Requires Oracle client for windows server 2008 Version 6.1

Hello
I am using Windows 2008 Server Version 6.1 (64 Bit). I want to install Oracle client on this server. Which version is suitable for my requirement and from where i can download it.
Thanks
Sijo Thomas

user12248518 wrote:
I am in the same boat, I have downloaded what was told to download and it doesn't install it keeps saying "Unknown" 3 times in a popup when I try to install.Oracle has roughly 3,000 products. You downloaded 'what you were told' - one of those 3,000 products. And it didn't work.
The amount of information you provide is surprisingly sparse, assuming you want assistance.
So - if you want help, you might wnat to provide some information:
- the operating system (including edition, and major service pack if WIndows, or distro && major/minor release and kernel if *nix)
- the URL froim which you downloaded
- the country yuo are in (since ORacle could redirect to several sitres based on region)
- the command or executable, including directory path, you run or double-click on
- the 'exact' error message, or if a generic one like "Unknown", perhaps a screen shot to convince us that it is actually such a generic message
It's just a suggestion, but answering in such detail actually tells us you are serious about resolving the issue - you put in effort, and that may convince us to return some effort.

How to keep track of client in rmi server

how can I keep track of a disconnected client in a rmi server ?
And what logic do I use to disconnect a client fro mthe server ?

When a RMI client receives a stub to the remote object, RMI client runtime sends a dirty() call to the RMI server runtime which in turn helps the RMI server runtime in updating the client references to the remote object. Client reference is nothing but a unique identification generated by client RMI runtime for that instance of JVM. RMI uses a reference counting algorithm for destroying unreferenced remote objects. Once all references (all clients who are holding the stub to this remote object) to a remote object drops to zero, local garbage collector takes care of freeing this remote object.
RMI client runtime initiates a TCP connection with the remote object only when a method is invoked on the stub. RMI transport layer uses a simple connection pooling mechanism to use already established TCP connections with server objects in further remote method invocations. Let's say the client is invoking a remote method on the remote object's stub fetched from the registry service. Now RMI transport layer initiates a TCP connection with the remote object (exported at ("host1", 4567)). After completion of the remote method, RMI client's transport layer keeps the connection open for some time (some configurable value) to take the advantage of the already established TCP connection in future remote method invocations on remote objects exported on the same host and port ("Host1", 4567"). RMI transport layer also takes care of closing these connections if the connections are idle more than configured value of connection open time.
From the RMI server's perspective, once the RMI server runtime receives a remote method invocation request from the RMI client, it creates a new thread and try to dispatch the method on the designated remote object. After returning the results of the remote method to the client, RMI client's transport layer may not end this conservation with this remote object to take the advantage of this TCP connection in future remote method invocations. So the same thread may be used for dispatching another remote method in future. This is actually the side effect of re-using the established TCP connections on the client side.
RMI server maintains client's reference in the client's reference set of the remote object as long as the client holds a normal reference to remote object's stub in its JVM. Once the client relinquishes the reference to the stub (goes out of the scope or setting it to the null), RMI client automatically sends clean() call to the RMI server runtime to update client reference set of the remote object. There is no public API to lookup or manipulate the client references for a given remote object, but you can always unexport the remote object even some clients are holding stubs to the remote object. Next time when the client invokes the remote method using this stub, client will receive a "connection refused exception" from the server because the remote object is already unexported. Let's say if the RMI server is started again (remote object is exported and registered with registry service), the client once again obtains the stub to the remote object from the registry service instead of using earlier stale stub. (This time remote object may have been exported on different port, so the port details in the old stub may not be valid any more).
At any point of time there can be more than one established TCP connection with the RMI client. This may be the temporary condition; RMI client's transport layer automatically closes these connections if it does not receive any remote method invocation requests with in a pre-determined interval of time (default: 2 min). You can always find out RMI client's host in a given remote invocation by using getClientHost(), but how can you semantically define a "disconnected client in a rmi server" in your application context ? You can always force all the clients to fetch the stub again in future remote method invocations by unexporting the remote object in RMI server. I hope this information helps ...
-- Srinath Mandalapu

ODBC for Oracle 9i client on Presentation Server 4.5

Does anyone have an Oracle 9i ODBC driver or something that will work for an app that is Oracle 9.1 on presentation server 4.5? The application loads but tnsping returns ORA-12504 error.
Tnsnames is same tnsnames file we use on Presentation 4.0 for same app. Don't know how to fix. Vendor says not supported, boss says too bad make it work.
I can't find 9.1 drivers on Oracle site. If someone has them or has a solution please reply to this post.
Thanks

Hi, I appreciate your reply. Let me explain. We use a program called Centricity EMR formerly known as Logician. The program is bundled into an Oracle database. I did get the version wrong. Here is from the About in the program: Logician 5.6.8_1 (125) / DB 5.6.8_1
E&M Advisor 5, 4, 1, 7
Medispan MDDB database 2007.12
Oracle9i Release 9.2.0.4.0 - Production
Next item is Presentation Server is a version of Citrix. We currently are in production on Presentation Server 4.0. We want to rollout into a new Citrix farm that is Presentation 4.5. I don't know if you are familiar with Citrix or not. At any rate we load a Logician client to the server and publish it so users can get to it from their thin client (citrix) devices.
The Oracle Home lives on the Oracle database server not on the Citrix servers. We only have one Home per Oracle server.
I don't do a command line tnsping, I have a utility that comes with Logician to check Oracle Server connectivity.
It does the same thing as if I typed tnsping <database name>.
Here is our sqlnet.ora (we don't modify this ever, it is already configured)
# SQLNET.ORA Network Configuration File: d:\oracle\ora92\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.
NAMES.DEFAULT_DOMAIN= WORLD
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES, HOSTNAME)
Here is tnsnames.ora (we can modify the part in front of the .WORLD and the ip address)
<databasename>.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = TCP.world)
(PROTOCOL = TCP)
(Host = <ipaddress>)
(PORT = 1521)
(CONNECT_DATA = (SID = ORA7)
# (SDU=8192)
I think that is all you asked for. Like I said the Logician client runs just fine in Presentation 4.0. On 4.5 I can't connect to the Oracle but it has to be something simple I can change to make it work. The reason why I think it is ODBC is because Presentation server has a 32-bit ODBC and a 64-bit ODBC. You can't see the service in 64-bit but you can in 32-bit. I just can't figure out how to trick it to pull from 32-bit.
Thanks so much, hope you can help

About send TCP package to other server program with the ABAP

I have a server program, it receipt the tcp data package,then process,then return the result with tcp package.
the data come from the sap system.
for example, the material master record.
I can use the abap to get the data,but i have no idea to send the data to server progam and receipt the result.
How to do it? Who can help me.Thanks a lot.
Best regards.
LnSinco.

> As an experiment, I tried going the other way. That it, I started up the
> Simple Data Server VI on the Windows PC. I then "pointed" my SGI client at
> the server on the PC. It works, ... sort of. I am getting an
> appropriately sized list of numbers displayed on the SGI host, but while
> most look like floating point values, some look like VERY large integers.
>
> I believe I have a data representation problem. That is, I don't know if I
> should expect to send (server-side) or see (client-side) C programming
> variables of type 4-byte floats, 8 byte doubles, or something else. Also, I
> am not certain how many values I should expect to send/see in each message.
> I think the default for the Simple Data Client/Server programs is 200
> points
, but I am not sure what that really means, either.
>
By default, LV converts all of the datatypes to be in big endian form.
I'm not sure about your SGI, but if it is a little endian machine, then
that will cause problems. If that is the case, you will want to swap
the words and bytes of the four byte values.
To debug this more easily, you might just make sure you send over very
predictable data such as 0, 1, 2, 3, etc. Lots of times these are
tested with random data, but that makes it pretty hard to see a pattern
when the data is wrong.
Greg McKaskle

Labwindows tcp client to generic server

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