Can 11g client connect to 10g server?

I am very new to Oracle, so hope this isn't too basic of a question. I thought I saw something through my searches where the clients were backward compatible to older versions of the server. Will this work, 11g client connecting to a 10g server?
I have a custom windows app that uses the Oracle client to pull data from an Oracle server at another location and pushed the data into a MS-SQLExpress database for a local cache to be used during th day. I do not have the source for this custom app or the time to re-create this custom app. We just installed a new Windows 2008 R2 (64bit) server and I just need to get the client back on the new server so the custom app will work again. The old server was running 8.1.7 client, but going to 64bit OS I want to use a more current client to avoid issues with 32bit/64bit compatibility problems.
I am downloading the 11g 64bit client now, but want to make sure I'm not wasting my time and need to get a different client. Please advise.
Thanks!

In general, yes, you can use a later version of the client to connect to an earlier version of the database and vice versa. But that only generally works for a few major releases. Unfortunately "10g" and "11g" are somewhat ambiguous-- both could be referring to one of two major releases.
Metalink 207303.1 is the client/server interoperability matrix. If by 11g you mean 11.2 and by 10g you mean 10.1, the 11.2 client will not work with a 10.1 database. If the client is 11.2 and the database is 10.2, it should be at least 10.2.0.2. If the client is 11.1, the database should be 10.1.0.5 or 10.2.0.2 or higher.
Justin

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Message was edited by: Gary Sumlak

OK. A quick update.
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I have the following problem:
My RMI-Server runs for ever. In a batch-queue I have a procedure which looks periodly wether rmiregistry
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My client as a simple example is displaying the server time. If any communication-problem with the
server exists, I need an automatic reconnect to the server. I accept that into the time distanz of the
error the display is frozen. Its unacceptable to restart the client !!.
The following example demonstates my test-example:
Server:
1. Start
2. waits for connecting (factory)
3. answer time-requests
Client:
1. Start
2. create a time class initially 1.jan.1970 00:00:00
3. Start a timer displaying the time class every second
4. start a timer connecting/reconnecting to the server and ask the servers actual time every second
PS. Is the server to stubil programmed, so that a hang can exists?
It would be nice, if anybody could answer me !!
The following sources work correctly without solving the problem of the reconnect:
////////////// Echo.java
package emi.server;
import java.rmi.*;
import java.util.*;
public interface Echo
extends Remote
public Date getTime() throws RemoteException;
////////////// EchoClient.java
package emi.server;
//import emi.utility.basics.*;
public class EchoClient
public static void main(String args[]) throws Exception
EchoClient echoclient1 = new EchoClient();
//Check the argument count
if (args.length != 1)
System.err.println("Usage: EchoClient <server> --> EXIT");
System.exit(0);
// all of time relevant things
Etim acttim = new Etim();
// displaying continous the time
EchoClientDisplay disp = new EchoClientDisplay(acttim);
disp.StartTimer();
// transfering continous the time from the server
EchoClientTransfer trans = new EchoClientTransfer(acttim, args[0]);
trans.StartTimer();
////////////// EchoClientDisplay.java
package emi.server;
import java.awt.event.*;
import javax.swing.*;
// displaying every 750 Milliseconds the value of the time
public class EchoClientDisplay implements ActionListener
private Timer tim;
private Etim tact;
public EchoClientDisplay(Etim tact)
tim = new Timer(750, this);
this.tact = tact;
public void StartTimer()
tim.setRepeats(true);
tim.setInitialDelay(5);
tim.start();
public void actionPerformed(ActionEvent e )
System.out.println(tact.toString());
////////////// EchoClientTransfer.java
package emi.server;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.awt.event.*;
import javax.swing.Timer;
import java.util.Date;
// transferring the actual time from the server
public class EchoClientTransfer implements ActionListener
private Etim tact;
private String hostname;
private Timer tim;
private boolean init = false;
private Echo echoRef1 = null;
public EchoClientTransfer(Etim tact, String hostname)
this.tact = tact;
this.hostname = hostname;
this.tim = new Timer(500, this);
public void StartTimer()
tim.setRepeats(true);
tim.setInitialDelay(5);
tim.start();
public void actionPerformed(ActionEvent e )
//>>>>>>>>>>> this construction doesnt work correctly, its only good until the first
// network error
try
if( init == false )
// Create and install the security manager
System.setSecurityManager(new RMISecurityManager());
//get the remote factory object from the registry
String url = new String("rmi://"+ hostname +"/EchoFactory");
EchoFactory remoteFactory = (EchoFactory)Naming.lookup(url);
//get references to new EchoImpl instances
echoRef1 = remoteFactory.getEcho("User Meyer");
init = true;
if( init = true )
//make the remote calls
Date d = echoRef1.getTime();
tact.setDate(d);
catch(Exception ee)
System.out.println(ee.toString());
init = false;
//<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
////////////// EchoFactory.java
package emi.server;
import java.rmi.RemoteException;
import java.rmi.Remote;
public interface EchoFactory extends Remote
Echo getEcho(String userName) throws RemoteException;
////////////// EchoFactoryImpl.java
package emi.server;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
public class EchoFactoryImpl extends UnicastRemoteObject implements EchoFactory
EchoFactoryImpl() throws RemoteException {};
public Echo getEcho(String userName) throws RemoteException
EchoImpl echoRef = new EchoImpl(userName);
return (Echo)echoRef;
////////////// EchoImpl.java
package emi.server;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.util.*;
public class EchoImpl extends UnicastRemoteObject implements Echo
private String userName;
public EchoImpl() throws RemoteException
public EchoImpl(String userName) throws RemoteException
this.userName = userName;
public Date getTime()
Etim e = new Etim();
e.setTimeAct();
return e.get();
////////////// EchoServer.java
package emi.server;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
public class EchoServer
public static void main(String args[]) throws Exception
// Create and install the security manager
System.setSecurityManager(new RMISecurityManager());
// Create the servant instance for registration
EchoFactory factoryRef = new EchoFactoryImpl();
// Bind the object to the rmiregistry
Naming.rebind("EchoFactory", factoryRef);
System.out.println("Echo object ready and bound to the name 'EchoFactory'!");
////////////// Etim.java
package emi.server;
import java.util.*;
import java.text.*;
// this is my central class working up all time problems .. many hundred lines of code
// I think, you must not look at this code ist setting and reading time
// this is only a subset of methods for this example
public class Etim
private Date dat;
private Calendar cal;
public Etim()
cal = Calendar.getInstance(); // Gregorianischer Kalender
dat = new Date(0L); // January 1, 1970, 00:00:00
cal.clear();
* Zeit lesen.
public Date get()
return dat;
// setting the time
public void setDate( Date d )
dat.setTime( d.getTime() );
cal.setTime(dat);
// gets my time-class to the current system-clock
public void setTimeAct()
long millis;
millis = System.currentTimeMillis();
setMilli(millis);
* Zeit setzen.
public void setMilli(long millis)
dat.setTime(millis);
cal.setTime(dat);
// time in german format: day.month.year hour:minute:second:millisecond
public String toString()
return toStringTagMoJahr() + " " + toStringStdMiSek() +
":" + cal.get(Calendar.MILLISECOND);
* Ausgabeformat Tag.Monat.Jahr (z.B. 01.01.2001).
public String toStringTagMoJahr()
SimpleDateFormat s = new SimpleDateFormat("dd.MM.yyyy");
return s.format(dat);
* Ausgabeformat Stunde:Minute:Sekunde (00:00:00 - 23:59:59).
public String toStringStdMiSek()
SimpleDateFormat s = new SimpleDateFormat("HH:mm:ss");
return s.format(dat);

Hello willy51,
Thank you for answering.
I think, your comment of the design is true - its a problem when starting up in a new enviroment and
you have nobody who shows you the right direction at the beginning. Talking personally together only
10 minutes is better than writing a noval.
I thing the following model of a client works better:
concept:
- visualize a personal time class continously evgery second
- if there is a connection to a server set the time-class with the server time
- if you loss connection, try to reconnect
question:
in which situation hangs connectToServer() ?
(whithout the simple errors : no rmiregistry, no rmi-server)
public class EchoClient
private String hostname;
public static void main(String args[]) throws Exception
// my internal TIME-Class
Etim acttim = new Etim();
// Create and install the security manager
System.setSecurityManager(new RMISecurityManager());
// remote call
Echo echoRef1 = null;
String url = new String("rmi://"+ servername:port +"/EchoFactory");
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EchoClientDisplay disp = new EchoClientDisplay(acttim);
disp.StartTimer();
// transfering continous the time from the server, technic = swing.timer
// The state of transfer from server = offline
EchoClientTransfer trans = new EchoClientTransfer(acttim);
trans.StartTimer();
// Connect to server
connectToServer(url, echoRef1, trans);
// wait for ever, if connection failed, try every 5 seconds a reconnect to server
while(true)
// test, if connection failed. The connections fails if the Object EchoClientTransfer
// get a error, when it asks the server for the time ( remote call )
if(trans.getStatus() == false ) // test, if connection failed
connectToServer(url, echoRef1, trans);
// try it again after 5 seconds
Thread.sleep(5000);
private static void connectToServer(String url, Echo echoRef1, EchoClientTransfer trans)
System.out.println("Retry connection");
// Connect to server
while( true )
try
//get the remote factory object from the registry
EchoFactory remoteFactory = (EchoFactory)Naming.lookup(url);
//get references to new EchoImpl instances
echoRef1 = remoteFactory.getEcho("User Meyer");
// reactivate Datatransfer because I have now a new connection to the server
trans.reactivateAfterConnectionError(echoRef1);
// end of initialisation
break;
catch( Exception e )
//>>>>>>> Error initialising connection to server. try again after 5 seconds"
Thread.sleep(5000); // retry after 5 seconds

11g client connection to XE fails

Hi,
I have installed the 11g client beta and Oracle XE on the same system running Vista Ultimate.
The 11g client can connect to Oracle 9i running on remote systems.
The XE sqlplus can connect to the local XE instance (and remote Oracle instance).
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Fatal NI connect error 12532, connecting to:
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Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 11.1.0.4.0 - Beta
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Tracing not turned on.
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When I change HOST and SERVICE_NAME it works perfectly well to connect to a remote Oracle instance.
Disabling the local firewall does not help.
In the PATH, the 11g client path comes before the XE path. (No ORACLE_HOME set)
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Thanks!

Strange. I have 10g XE with the 11g ODAC beta, but I can connect using localhost as my TNS host name. Another solution may be using the IP address for localhost: 127.0.0.1
One thing to keep in mind is that SQLPlus comes with 10gXE, not 11g ODAC beta. So, the version of SQLPlus you are using is really from the 10g Home.
Ming Man,
It sounds like you need to copy over a tnsnames.ora file to your new ODP.NET 11g Home or some other general Oracle connectivity configuration not set.

How to make the client connect to the server at the command prompt?

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import java.net.*;
import java.util.*;
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    // Get the port # from the command line
    int port = Integer.parseInt( args[0] );
    // Create a Server object, which will automatically begin
    // accepting connections.
    new Server( port );
}CLIENT:
import java.io.*;
import java.net.*;
public class ServerThread extends Thread
// The Server that spawned us
private Server server;
// The Socket connected to our client
private Socket socket;
// Constructor.
public ServerThread( Server server, Socket socket ) {
    // Save the parameters
    this.server = server;
    this.socket = socket;
    // Start up the thread
    start();
// This runs in a separate thread when start() is called in the
// constructor.
public void run() {
    try {
      // Create a DataInputStream for communication; the client
      // is using a DataOutputStream to write to us
      DataInputStream din = new DataInputStream( socket.getInputStream() );
      // Over and over, forever ...
      while (true) {
        // ... read the next message ...
        String message = din.readUTF();
        // ... tell the world ...
        System.out.println( "Sending "+message );
        // ... and have the server send it to all clients
        server.sendToAll( message );
    } catch( EOFException ie ) {
      // This doesn't need an error message
    } catch( IOException ie ) {
      // This does; tell the world!
      ie.printStackTrace();
    } finally {
      // The connection is closed for one reason or another,
      // so have the server dealing with it
      server.removeConnection( socket );
}Thanks for your time.

CLIENT:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
public class Client extends Panel implements Runnable
// Components for the visual display of the chat windows
private TextField tf = new TextField();
private TextArea ta = new TextArea();
// The socket connecting us to the server
private Socket socket;
// The streams we communicate to the server; these come
// from the socket
private DataOutputStream dout;
private DataInputStream din;
// Constructor
public Client( String host, int port ) {
    // Set up the screen
    setLayout( new BorderLayout() );
    add( "North", tf );
    add( "Center", ta );
    // We want to receive messages when someone types a line
    // and hits return, using an anonymous class as
    // a callback
    tf.addActionListener( new ActionListener() {
      public void actionPerformed( ActionEvent e ) {
        processMessage( e.getActionCommand() );
    // Connect to the server
    try {
      // Initiate the connection
      socket = new Socket( host, port );
      // We got a connection! Tell the world
      System.out.println( "connected to "+socket );
      // Let's grab the streams and create DataInput/Output streams
      // from them
      din = new DataInputStream( socket.getInputStream() );
      dout = new DataOutputStream( socket.getOutputStream() );
      // Start a background thread for receiving messages
      new Thread( this ).start();
    } catch( IOException ie ) { System.out.println( ie ); }
// Gets called when the user types something
private void processMessage( String message ) {
    try {
      // Send it to the server
      dout.writeUTF( message );
      // Clear out text input field
      tf.setText( "" );
    } catch( IOException ie ) { System.out.println( ie ); }
// Background thread runs this: show messages from other window
public void run() {
    try {
      // Receive messages one-by-one, forever
      while (true) {
        // Get the next message
        String message = din.readUTF();
        // Print it to our text window
        ta.append( message+"\n" );
    } catch( IOException ie ) { System.out.println( ie ); }
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;
public class ClientApplet extends Applet
public void init() {
    String host = getParameter( "192.168.1.47" );
    int port = Integer.parseInt( getParameter( "5000" ) );
    setLayout( new BorderLayout() );
    add( "Center", new Client( host, port ) );
}Sorry about that. Now when I run an html file with this applet I just get the x in the corner.
Thanks for looking.

TNS-12518: TNS:listener could not hand off client connection, XE 10g/WinXP

I've installed Oracle XE 10 on Windows XP. When I browse to the database homepage, I get this in listener.log:
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
08-FEB-2012 01:07:24 * service_register * xe * 0
08-FEB-2012 01:07:24 * http * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1702)) * handoff * http * 12518
TNS-12518: TNS:listener could not hand off client connection
TNS-12560: TNS:protocol adapter error
I don't think it is shortage of resources (just rebooted). I put "DIRECT_HANDOFF_TTC_LISTENER=OFF" in listener.ora .. no luck. I removed the listener.ora file altogether ... ditto.
What else could cause this?
Steve

I can connect from SQLPlus. Laptop has 3 GB RAM.
===== set =====
C:\Documents and Settings\shawes>set
ALLUSERSPROFILE=C:\Documents and Settings\All Users
APPDATA=C:\Documents and Settings\shawes\Application Data
CLIENTNAME=Console
CommonProgramFiles=C:\Program Files\Common Files
COMPUTERNAME=shawes-us
ComSpec=C:\WINDOWS\system32\cmd.exe
DEFLOGDIR=C:\Documents and Settings\All Users\Application Data\McAfee\DesktopProtection
FP_NO_HOST_CHECK=NO
HOMEDRIVE=C:
HOMEPATH=\Documents and Settings\shawes
JDEV_USER_DIR=D:\JDeveloper\mywork
LOGONSERVER=\\shawes-us
NUMBER_OF_PROCESSORS=4
OS=Windows_NT
Path=C:\oraclexe\app\oracle\product\10.2.0\server\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\
ThinkPad\ConnectUtilities;C:\Program Files\TortoiseSVN\bin;C:\bin
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH
PROCESSOR_ARCHITECTURE=x86
PROCESSOR_IDENTIFIER=x86 Family 6 Model 37 Stepping 2, GenuineIntel
PROCESSOR_LEVEL=6
PROCESSOR_REVISION=2502
ProgramFiles=C:\Program Files
PROMPT=$P$G
SESSIONNAME=Console
SystemDrive=C:
SystemRoot=C:\WINDOWS
TEMP=C:\DOCUME~1\shawes\LOCALS~1\Temp
TMP=C:\DOCUME~1\shawes\LOCALS~1\Temp
TPCCommon=C:\PROGRA~1\THINKV~1\PrdCtr
TSMPATH=C:\Program Files\ThinkPad\UltraNav Utility
USERDOMAIN=shawes-us
USERNAME=shawes
USERPROFILE=C:\Documents and Settings\shawes
VSEDEFLOGDIR=C:\Documents and Settings\All Users\Application Data\McAfee\DesktopProtection
windir=C:\WINDOWS
===== lsnrctl stat =====
C:\Documents and Settings\shawes>lsnrctl stat
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 08-FEB-2012 23:55:53
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production
Start Date 08-FEB-2012 19:32:02
Uptime 0 days 4 hr. 23 min. 53 sec
Trace Level user
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File C:\oraclexe\app\oracle\product\10.2.0\server\network\admin\listener.ora
Listener Log File C:\oraclexe\app\oracle\product\10.2.0\server\network\log\listener.log
Listener Trace File C:\oraclexe\app\oracle\product\10.2.0\server\network\trace\listener.trc
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=SHAWES-US.us.oracle.com)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "XEXDB" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "XE_XPT" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
The command completed successfully

How to Non-ACC Client connect Sun App Server 8 with SSL

I have create a Rich Client(Non-ACC) that connect to Sun App Server 8 with IIOP(8001) and is working fine. However, when I try to connect to same server with using SSL (8002) and throw exception during lookup a Bean as below.
Please help!!
Server Configuration
================
IIOP Port(s): 8001, 8002, 8003
All listener ports are enabled
Client Coding
===========
env.put(javax.naming.Context.PROVIDER_URL, "iiop://"+url);
env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY,"com.sun.appserv.naming.S1ASCtxFactory");
System.setProperty("javax.net.ssl.keyStoreType", "jks");
System.setProperty("javax.net.ssl.keyStore", "D:\\Sun\\AppServer\\domains\\adsr\\config\\keystore.jks");
System.setProperty("javax.net.ssl.keyStorePassword", "password");
System.setProperty("javax.net.ssl.trustStore", "D:\\Sun\\AppServer\\domains\\adsr\\config\\cacerts.jks");
System.setProperty("javax.net.ssl.trustStorePassword", "password");
System.setProperty("com.sun.CORBA.connection.ORBSocketFactory", "com.sun.enterprise.iiop.IIOPSSLSocketFactory");
ic = new InitialContext(env);
Object objref = ic.lookup("ejb20/statelessSession/EntControllerHome");
Exception
========
[java] Mar 18, 2005 4:43:59 PM com.sun.corba.ee.spi.logging.LogWrapperBasedoLog
[java] INFO: "IOP00710299: (INTERNAL) Successfully created IIOP listener on the specified host/port: all interfaces/4645"
[java] Mar 18, 2005 4:44:00 PM com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl readFully
[java] WARNING: "IOP00410215: (COMM_FAILURE) Read of full message failed :
bytes requested = 12 bytes read = 7 max wait time = 300 total time spent waiting = 364"
[java] org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 215 completed: No
[java] at com.sun.corba.ee.impl.logging.ORBUtilSystemException.transportReadTimeoutExceeded(ORBUtilSystemException.java:2629)
[java] at com.sun.corba.ee.impl.logging.ORBUtilSystemException.transportReadTimeoutExceeded(ORBUtilSystemException.java:2655)
[java] at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.readFully(SocketOrChannelConnectionImpl.java:676)
[java] at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.read(SocketOrChannelConnectionImpl.java:545)
[java] at com.sun.corba.ee.impl.protocol.giopmsgheaders.MessageBase.readGIOPHeader(MessageBase.java:119)
[java] at com.sun.corba.ee.impl.transport.CorbaContactInfoBase.createMessageMediator(CorbaContactInfoBase.java:153)
[java] at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.readBits(SocketOrChannelConnectionImpl.java:325)
[java] at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.handleEvent(SocketOrChannelConnectionImpl.java:1175)
[java] at com.sun.corba.ee.impl.transport.SelectorImpl.run(SelectorImpl.java:275)
[java] javax.naming.CommunicationException: Can't find SerialContextProvider [Root exception is org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 208 c
ompleted: Maybe]
[java] at com.sun.enterprise.naming.SerialContext.getProvider(SerialContext.java:133)
[java] at com.sun.enterprise.naming.SerialContext.lookup(SerialContext.java:290)
[java] at javax.naming.InitialContext.lookup(InitialContext.java:347)
[java] at com.shkco.jaf.test.JAFLogonTest.connect(JAFLogonTest.java:110)
[java] at com.shkco.jaf.test.JAFLogonTest.setUp(JAFLogonTest.java:134)
[java] at junit.framework.TestCase.runBare(TestCase.java:125)
[java] at junit.framework.TestResult$1.protect(TestResult.java:106)
[java] at junit.framework.TestResult.runProtected(TestResult.java:124)

I don't think tomcat supports the ejb-ref portion of web.xml. If you're using ejbs your best bet is to use a web container within a J2EE implementation.
--ken

Can 11g client connect to 10g server?

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