Java rmi
hi
i am trying to develop a distributed computing environment using java rmi for scentific computation. client (applet) log on to my server and register. the server invocates the methods on client (call back) and gets back the solution.
my client applet is not able to log on to the server and i have no idea why. here is the code..
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.URL;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.net.MalformedURLException;
import java.rmi.NotBoundException;
public class ClientImpl extends Applet implements Calculator{
public Callback s = null;
public void init(){
super.init();
try{
UnicastRemoteObject.exportObject(this);
catch(Exception e){
System.out.println("Could not export client remote object");
System.out.println(e);
try{
s = (Callback)Naming.lookup("rmi:///servername");
//Naming.lookup("rmi:///servername");
s.addClient(this);
System.out.println("Client registered");
catch(Exception e){
System.out.println("Could not set client interface at server");
System.out.println(e.toString());
System.err.println("Failed to setup for RMI"+ e.getMessage());
public double summ(double a,double b)throws
java.rmi.RemoteException {
double sum = 0,i;
for(i = a; i <=b; i++)
sum = sum + 1/(i*i*i);
return sum;
and also i have been read that there is a lot of problems associated with rmi when used thru client applet. so i am wondering wether this approach is right.?
any help will be appreciated.
lucifer
Can't quite figure out what you are doing. You seem to have a client that is trying to register with rmi.
What I EXPECTED to see was
o a server which is a UnicastRemote object, which registers with rmi on the server.
o A client which tries to access the server by doing a naming.lookup.
o The client then calling the server, passing a reference to itself so that the server can do the callback.
There are some subtleties about interfaces that I have ignored (and which I don't see in your code).
There are some good examples of this kind of code in books. Try java Exmples in a Nutsell, Java in a Nutshell, or the O'reilly book on network communications.
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}As is so often the case, Google is your friend.
Googling for the exception message (JAXRPCSERVLET28: Missing port information) yields the following list.
http://www.google.com/search?hl=en&q=JAXRPCSERVLET28%3A+Missing+port+information&btnG=Google+Search
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at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:140)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:167)
at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:52)
at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:104)
at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:109)
at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487)
at org.jboss.ejb.Container.invoke(Container.java:726)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1055)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:491)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:362)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:42)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:28)
at java.lang.reflect.Method.invoke(Method.java:313)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:256)
at sun.rmi.transport.Transport$1.run(Transport.java:151)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:147)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:463)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
at java.lang.Thread.run(Thread.java:539)
Caused by: java.rmi.ServerException: Could not instantiate bean; nested exception is:
java.lang.InstantiationException
at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:211)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:122)
at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:98)
... 20 more
Caused by: java.lang.InstantiationException
at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:33)
at java.lang.reflect.Constructor.newInstance(Constructor.java:263)
at java.lang.Class.newInstance0(Class.java:301)
at java.lang.Class.newInstance(Class.java:254)
at org.jboss.ejb.plugins.BMPPersistenceManager.createBeanClassInstance(BMPPersistenceManager.java:145)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.createBeanClassInstance(CachedConnectionInterceptor.java:251)
at org.jboss.ejb.EntityContainer.createBeanClassInstance(EntityContainer.java:294)
at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:208)
... 24 more
Pls explain what can i do now.
regards,
NaveenBabu.A
my client code is
import javax.ejb.*;
import javax.naming.*;
import java.rmi.*;
import javax.rmi.*;
import java.util.*;
import student.student1.*;
public class StudentClient
public static void main(String args[])
System.out.println("i am in start");
StudentHome home= null;
try{
System.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
System.setProperty("java.naming.provider.url", "localhost:1099");
Context context = new InitialContext();
try{
home = (StudentHome)PortableRemoteObject.narrow(context.lookup("Student"), StudentHome.class);
}catch(Exception e){System.out.println("err in StudentHome"+e);}
/* try{
home.create("Ammamn","A01");
}catch(Exception e){System.out.println("err in HomeCreate"+e);}*/
}catch(Exception e){System.out.println("error in client"+e);}
System.out.println("i am in end");
}Try this,
Context context = new InitialContext(System.getProperties()); -
Hi to all.
I have two classes.
The first is:
public class FatherBean implements Serializable {
public String name;
public int id;
/** Creates a new instance of ChildBean */
public FatherBean() {
this.name= null;
this.id = 0;
public String getName() {
return name;
public void setName(String name) {
this.name = name;
public int getId() {
return id;
public void setId(int id) {
this.id = id;
The second is :
public class ChildBean extends FatherBean implements Serializable {
public double number;
/** Creates a new instance of ChildBean */
public ChildBean() {
super();
this.number = 0.0;
public double getNumber() {
return number;
public void setNumber(double number) {
this.number = number;
A test client class implements the following method that is exposed as web service:
public java.util.Collection getBeans() {
java.util.Collection beans = new ArrayList();
ChildBean childBean1 = new ChildBean();
ChildBean childBean2 = new ChildBean();
childBean1.setId(100);
childBean1.setName("pippo");
childBean1.setNumber(3.9);
childBean2.setId(100000);
childBean2.setName("pluto");
childBean2.setNumber(4.7);
beans.add(childBean1);
beans.add(childBean2);
return beans;
When I invoke the web service to url:
http://localhost:8080/Prova
and invoke the correspondent method on jsp client, throws exception:
java.rmi.ServerException: Internal Server Error (serialization error: no serializer is registered for (class test.ChildBean, null))
at com.sun.xml.rpc.client.StreamingSender._raiseFault(StreamingSender.java:357)
at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:228)
at ws.ProvaClientGenClient.ProvaRPC_Stub.getBeans(ProvaRPC_Stub.java:59)
at ws.ProvaClientGenClient.getBeans_handler.doAfterBody(getBeans_handler.java:64)
at jasper.getBeans_TAGLIB_jsp._jspService(_getBeans_TAGLIB_jsp.java:121)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:720)
at org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrapperValve.java:118)
at org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValve.java:278)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:274)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
Where is the problem? Will be ChildBean that extends FatherBean? Wich settings on Sun Java Studio Enterprise 6 2004Q1?
Thank you.Hi,
This forum is for Sun Java Studio Creator related questions. Could you pls post your message in the appropriate forum.
Thank you
Cheers :-) -
I am trying to transmit a document as a byte array to a web service using jax-rpc, and I get the following error:
2004-05-25 08:04:39,468 exception [Thread-5] - [email protected]33fd java.rmi.ServerException: Internal Server Error (deserialization error: XML parsing error: com.sun.xml.rpc.sp.ParseException:58: Expected "</ns0:receivexmldocument>" to terminate element starting on line 2)
at com.sun.xml.rpc.client.StreamingSender._raiseFault(StreamingSender.java:370)
at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:231)
at com.mobius.cmsl.client.contentindexlistener.ContentWebServiceListenerIF_Stub.receivexmldocument(ContentWebServiceListenerIF_Stub.java:63)
at com.mobius.cmsl.adapters.convera.client.ContentWebServiceClient.sendxml(ContentWebServiceClient.java:89)
at com.mobius.cmsl.adapters.convera.client.ContentInterceptor.doGet(ContentInterceptor.java:89)
at com.mobius.cmsl.adapters.convera.client.ContentInterceptor.doPost(ContentInterceptor.java:110)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:536)
The code looks like:
Client:
clientStub = (ContentWebServiceListenerIF_Stub)new ContentIndexService_Impl().
getContentWebServiceListenerIFPort();
clientStub._setProperty(Stub.ENDPOINT_ADDRESS_PROPERTY, endPoint);
obj = clientStub.receivexmldocument(cd.externalLink.contents,inxml);
Web Service:
public String receivexmldocument(byte docstream[],
String inxml
) throws RemoteException {
The wsdl looks like:
<message name="ContentWebServiceListenerIF_receivexmldocument">
<part name="arrayOfbyte_1" type="xsd:base64Binary"/>
<part name="String_2" type="xsd:string"/></message>
<operation name="receivexmldocument" parameterOrder="arrayOfbyte_1 String_2">
<input message="tns:ContentWebServiceListenerIF_receivexmldocument"/>
<output message="tns:ContentWebServiceListenerIF_receivexmldocumentResponse"/></operation>
The documents I am sending do contain special characters like maybe japanese or italian.Sounds like the xml you are sending is not well-formed. Please start with simple xml documents to see if it works.
-
Simple question about java.rmi.registry.Registry
Hi,
where the object java.rmi.registry.Registry takes a URL to rmiregistry when perform bind method.
thanks.Ok, will try to explain.
I have a server that I register in the RMI registry. Client from a remote machine get the server (as a remote object) and calls his method for the generation of another object on the parameters passed. The server creates this object and tries to register it in the RMI registry, and this raises an exception Registry.Registry.rebind disallowed; origin /11.0.10.31 is non-local host.
11.0.10.31 is a IP - address of the client -
RemoteException: 111 java.rmi.ServerError: Error occurred in server thread
Hi,
I'm just new to the RMI field of JAVA. I'm trying to write a program that import the math.jar file in the server side. And the client end can invoke the methods of math.jar and get the value.
I got the error messages as below:
RemoteException: 111 java.rmi.ServerError: Error occurred in server thread; nested exception is:
java.lang.NoClassDefFoundError: org/mathwhizz/Heron
It can work well if I use source classes(*.class) directly instead of importing math.jar. The failure only happened when I try to make use of jar file. Thus I guess my setup and configuration should be ok. Is there anything I should be very careful if I try to run RMI and import a jar file in the program of server side ?
Do I need to use JNLP and web start application in this issue?
I'm appreciated for your responses...thanks...
Sincerely,
BrandonI've got a problem with rmi, when I launch my server, I have this error:
Erreur du remote: java.rmi.ServerError: Error occurred in server thread; nested exception is:
java.lang.NoClassDefFoundError: com/borland/dx/dataset/DataSetData
Help me please
Thank you
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