Is it a bad idea to use exception chaining when throwing RemoteExceptions? We have an RMI server that does something like this:
public Object doSomething() throws RemoteException
{
try
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I am writing a very simple RMI server, and I am seeing intermittent java.rmi.NoSuchObjectExceptions in the unit tests.
I have a string of remote method calls on the same object, and ... |
What are the best practices for exceptions over remote methods?
I'm sure that you need to handle all exceptions at the level of a remote method implementation, because you need to log ... |
i need to write a RMI client/server application that the server is running in a different process. when i am running my code in the same process everything is working fine, ... |
I'm writing an rmi application. Everything works perfectly fine when i put the all classes in one directory(one single package). However, when i try to split the server part and the ... |
When I try to run an RMI client after running the RMI server I get the following exception:
EncodeInterface exception: java.lang.ClassCastException: $Proxy30 cannot be cast to hw2.chat.backend.main.EncodeInterface
java.lang.ClassCastException: $Proxy30 cannot be cast to ...
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When iam running RMI Server in netbeans iam getting java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:1099 connect,resolve)
Pls suggest what to do?
Thanks in Advance
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I am getting below exception from RMI when I try to run a Server which uses a remote registry.
My registry cod for the main method in Server2 class is
Registry registry = ...
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When using rmi ,after a call to remote metod if connection betwen two computer broke and remote exception thrown ,called metod execution discarded immediately or it continue execution
until it finish ? ... |
Do you see any possibility to log server side exceptions?
Consider such code on the server side:
catch (Exception ex) {
throw new IllegalStateException (ex);
} ...
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While executing any program , i am getting the unmarshalling exception , my rmiregistry is also running , does anyone of you have any idea of this exception. is there some ... |
I have come across this error message, it is coming from a data connection pool, has anyone come across this before?
java.rmi.NoSuchObjectException: The object identified by: '835' could not be found.
Either ...
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i get this error when i try to call a remote interface:
java.rmi.MarshalException: error marshalling arguments; nested exception is: java.io.NotSerializableException: javax.crypto.Cipher
These are the interfaces:
public interface Operacion extends Remote{
String ...
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package rahul; import java.rmi.*; public interface Hello extends Remote{ String sayHello() throws RemoteException; } package rahul; import java.rmi.*; import java.rmi.server.UnicastRemoteObject; import rahul.*; public class HelloImpl extends UnicastRemoteObject implements rahul.Hello{ private String name; public HelloImpl(String s) throws RemoteException { super(); name = s; } public String sayHello() throws RemoteException { return "Hello World!"; } public static void main(String args[]){ try { System.setSecurityManager(new ... |
Hi, I'm writing a client/server application using RMI. The method book ticket calls remote methods. While testing the application I noticed that if I stop the server and then call this method errors are displayed on dos prompt instead of displaying message dialog. Is my logic wrong ? public void bookTickets(int recordNumber, int seats, int operatingMode) { : : try { ... |
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I am running in to some problems. Here is the setup. I have an HP Unix System running rmiregistry with a bound Controller called /OrderController. The client is a Windows NT4 system. I run the HelloClient program using the following command line: java -Djava.security.policy=Registry.policy HelloClient This works only when the 'Stub' class is in the same directory as the HelloClient class. ... |
Usually it's not a problem with the class but the interface it implements. If the registry can't see the interface for the stub, it can't "find" the class. I teach a fair number of distributed programming courses, and this is by far the most common oversight in setting up RMI. Interpreting exceptions in a distributed program is one of the more ... |
Without looking I would assume the client will receive the exact exception. If its a checked exception I believe the client would be forced to catch it anyway, so why not pass along the unchecked exceptions too? I think remoteExceptions are reserved for things related the the remote nature of a specific issue that causes the exception and not something like ... |
I have a question that should be simple for some of you to answer - I've looked at this problem quite a bit and I just can't seem to find what's wrong with this code: import java.util.Date; import java.rmi.RemoteException; import java.rmi.Remote; public interface DateFactory extends Remote { public Date build () throws RemoteException; public static final DateFactory singleton = new DateFactoryImpl ... |
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In this example, you are pointing java.rmi.server.codebase to your registry, which will not work. When a stub is exported to the registry, it is encoded by the server JVM with a location that the registry can use to retrieve the class definition that was used to make the stub object. The client process can get a stub from the registry, but ... |
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Without the stack trace and the corresponding code, it will be nearly impossible to debug this. This error comes when rmi attempts to add a live ref in the object table with an id that is already is use. By default this id is a UID that will be unique but the rmi internal classes use pre-defined ids. |
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I tried http://java.sun.com/j2se/1.5.0/docs/guide/rmi/hello/hello-world.html please help to resolve these exceptions(Hello.class is available ,still...) C:\rmi2> java -Djava.security.policy=policy.all example.hello.Server Server exception: java.rmi.ServerException: RemoteException occurred in server t hread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested excep tion is: java.lang.ClassNotFoundException: example.hello.Hello java.rmi.ServerException: RemoteException occurred in server thread; nested exce ption is: java.rmi.UnmarshalException: error unmarshalling arguments; nested excep tion is: java.lang.ClassNotFoundException: example.hello.Hello at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396 ) ... |
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you are a little terse here with details... can you show some code ?, what line/part of code is causing the exception ? does localhost resolve to your machine ? is the registry up and running, is the service bound to the registry, are you allowed to connect to the port ? are you using the good port number ? pascal ... |
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Hi Please check the below code, I am receiving an error when I try to add a new client to the server. public void actionPerformed(ActionEvent e) { if(e.getSource()==ok) { try { Connection con = dbPool.getConnection(); Statement stm = con.createStatement(); ResultSet rs = stm.executeQuery("select * from Login where username='"+txtuser.getText()+"'"); if(rs.next()) { JOptionPane.showMessageDialog(null,"Existing User","WARNING",JOptionPane.WARNING_MESSAGE); txtuser.setText(""); txtpassword.setText(""); txtipadd.setText(""); txtuser.requestFocus(); } else { ServImp obj=new ... |
import java.rmi.RemoteException; import java.rmi.registry.LocateRegistry; import java.rmi.registry.Registry; import java.rmi.server.UnicastRemoteObject; public class EchoEngine implements Echo { public EchoEngine() { } public void echo(String s9) { System.out.println(s9); } public static void main(String[] args) { //if(System.getSecurityManager()==null) System.setSecurityManager(new SecurityManager()); try { String name = "jefes"; Echo skeleton = new EchoEngine(); Echo stub = (Echo) UnicastRemoteObject.exportObject(skeleton,0); Registry registry = LocateRegistry.getRegistry(); registry.rebind(name,stub); System.out.println("EchoEngine found"); } catch(Exception e) { ... |
I have some problem in working on java RMI in netbeans IDE6.0 when I run the server this exception is represented : Remote exception: java.rmi.ConnectException: Connection refused to host: 192.168.73.68; nested exception is: java.net.ConnectException: Connection refused: connect It seems I have no permisson to port, and I dont know how I can activate the premission I'll be thank ful if you ... |
hi, my application is currently using JRE 3 and I want it upgrade to JRE 6. The problem is that when I point the JRE 6 it throws exception at application startup. Apr 3, 2009 10:00:49 AM sun.rmi.transport.tcp.TCPTransport$AcceptLoop executeAcceptLoop WARNING: RMI TCP Accept-0: accept loop for ServerSocket[addr=0.0.0.0/0.0.0.0,port=0,localport=1360] throws java.net.SocketTimeoutException: Accept timed out at java.net.PlainSocketImpl.socketAccept(Native Method) at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384) at java.net.ServerSocket.implAccept(ServerSocket.java:453) at java.net.ServerSocket.accept(ServerSocket.java:421) ... |
Hi all, I am running the following simple code for RMI MyRemote.java import java.rmi.Remote; import java.rmi.RemoteException; public interface MyRemote extends Remote { public String sayHello() throws RemoteException; } MyRemoteImpl.java package com.example.rmi; import java.rmi.Naming; import java.rmi.RMISecurityManager; import java.rmi.RemoteException; import java.rmi.server.UnicastRemoteObject; public class MyRemoteImpl extends UnicastRemoteObject implements MyRemote { public MyRemoteImpl() throws RemoteException{ } public String sayHello(){ return "Server says, 'Hello'"; } public ... |
Hi, I've spent the last two days trying to make this work but am not getting anywhere. I am trying to deploy some RMI objects for testing so that we can move forward with other tasks we want to use RMI for. The problem is that I keep getting java.security.AccessControlException: access denied (java.net.SocketPermission [external_ip:1099] connect,resolve) exceptions. Here is what I've done: ... |
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Hi, I have written a simple RMI program and compiled it using JDK 1.6_14. I am starting the rmi registry explicitly on a particular port which works properly. When i proceed to start the server where i am binding the remote object the program fails: Here are the programs i have written: Remote Interface package com.pack.rmi; import java.rmi.Remote; import java.rmi.RemoteException; public ... |
Hi, Please have a look at the following set of codes FileChoose.java import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.io.*; import java.rmi.Naming; public class FileChoose extends JFrame { private JButton choose; private JPanel southPanel, centerPanel, northPanel, scrollPanel; private FlowLayout flow1, flow2,flow3; private JFileChooser fileChooser; private int returnValue; private JLabel text; private JTextArea area; private JScrollPane scroll; private File folder, listOfFiles[], file, ... |
Yes, my registry is running fine . If i do a client and server in the same machine, no problems, but when i use two different machine then only this problem come in. I have made sure the registry and the server is up, plus i have disabled the firewall and tried including the 1099 port into the exception list. It ... |
$ java Client 10.80.26.31 Client exception: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601) at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198) at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:110) at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178) at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132) at $Proxy0.sayHello(Unknown Source) at Client.main(Client.java:52) Caused by: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) ... |
I'm developing a client/server java app via RMI. Actually I'm using the cajo framework overtop RMI (any cajo devs/users here?). Anyways, there is a lot of functionality the server needs to expose, all of which is split and encapsulated in manager-type classes that the server has access to. I get the feeling though that bad things will happen to me in ... |