RMI exception problem

Hi guys. I am developing distributed application based on RMI, but I have problem I cannot solve.
I compile my project, generate stubs for implementation classes and then run Server class. But each time I get following errors:
java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
        java.lang.ClassNotFoundException: Server_Stub
        at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
        at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
rce)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
ce)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n Source)
        at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
        at sun.rmi.server.UnicastRef.invoke(Unknown Source)
        at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
        at java.rmi.Naming.rebind(Unknown Source)
        at Server.main(Server.java:341)I run the name server in the same folder, than all other code and all class files should be there also. Do you have any thought, why is this happening? Thanks

Look at the stack trace. You will see:
(a) Registry.bind(), which means you are invoking a Registry operation
(b) ServerException, which means that whatever the exception was it happened in the server you were calling, not in your own code. In this case it happened inside the Registry's implementation of bind().
So it is the Registry that can't find the class.

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<?xml version='1.0' encoding='UTF-8'?>
<definitions name="ProposalWSServiceDefinitions" targetNamespace="http://com/my/ws" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:s0="http://com/my/ws" xmlns:s1="http://schemas.xmlsoap.org/wsdl/soap/">
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<element name="title" type="string"/>
<element name="creator" type="string"/>
<element name="status" type="string"/>
<element name="customerId" type="int"/>
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<xs:complexType>
<xs:sequence>
<xs:element name="proposal" type="opl:Proposal" xmlns:opl="http://www.my.com/opl"/>
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</xs:complexType>
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<operation name="insertProposal" parameterOrder="parameters">
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<operation name="insertProposal">
<s1:operation soapAction="" style="document"/>
<input>
<s1:body parts="parameters" use="literal"/>
</input>
</operation>
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<port binding="s0:ProposalWSServiceSoapBinding" name="ProposalWSSoapPort">
<s1:address location="http://172.16.208.45:7001/SBSWebService/ProposalWS"/>
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RMI exception calling web service from proxy class

I am getting the following error attempting to call a web service from a proxy. It appears to relate to the type of objects I am trying to send vs the type that is expected. Following the exception I am adding a copy of the control where calling the web service is sucessful, a copy of the proxy class that I am using to make this unsucessful call, and the controller.jpf that has the formBean where I am creating my objects
Caught Exception Calling the Web Service from the Proxy. The Exception is the f
ollowing: java.rmi.RemoteException: web service invoke failed: javax.xml.soap.SO
APException: failed to serialize class org.openuri.www.CreateAccountCheckingReq
uestweblogic.xml.schema.binding.SerializationException: type mapping lookup fail
ure on class=class controls.CheckingService$anyType TypeMapping=TYPEMAPPING SIZE
=5
ENTRY 1:
class: org.openuri.www.CreateAccountCheckingResponse
xsd_type: ['http://www.openuri.org/']:lcl0:CreateAccountCheckingResponse
ser: org.openuri.www.CreateAccountCheckingResponseCodec@c0f4da
deser: org.openuri.www.CreateAccountCheckingResponseCodec@b1dd4
ENTRY 2:
class: org.openuri.www.FundingInfoAnonType
xsd_type: ['http://www.openuri.org/']:lcl0:FundingInfoAnonType
ser: org.openuri.www.FundingInfoAnonTypeCodec@1d36711
deser: org.openuri.www.FundingInfoAnonTypeCodec@13a59e
ENTRY 3:
class: org.openuri.www.AccountInfoAnonType
xsd_type: ['http://www.openuri.org/']:lcl0:AccountInfoAnonType
ser: org.openuri.www.AccountInfoAnonTypeCodec@1de5959
deser: org.openuri.www.AccountInfoAnonTypeCodec@bbf788
ENTRY 4:
class: org.openuri.www.CustomerInfoAnonType
xsd_type: ['http://www.openuri.org/']:lcl0:CustomerInfoAnonType
ser: org.openuri.www.CustomerInfoAnonTypeCodec@7824f9
deser: org.openuri.www.CustomerInfoAnonTypeCodec@1c35fe1
ENTRY 5:
class: org.openuri.www.CreateAccountCheckingRequest
xsd_type: ['http://www.openuri.org/']:lcl0:CreateAccountCheckingRequest
ser: org.openuri.www.CreateAccountCheckingRequestCodec@1cbcd7b
deser: org.openuri.www.CreateAccountCheckingRequestCodec@11f60ce
; nested exception is:
javax.xml.soap.SOAPException: failed to serialize class org.openuri.www
.CreateAccountCheckingRequestweblogic.xml.schema.binding.SerializationException:
type mapping lookup failure on class=class controls.CheckingService$anyType Typ
eMapping=TYPEMAPPING SIZE=5
ENTRY 1:
class: org.openuri.www.CreateAccountCheckingResponse
xsd_type: ['http://www.openuri.org/']:lcl0:CreateAccountCheckingResponse
ser: org.openuri.www.CreateAccountCheckingResponseCodec@c0f4da
deser: org.openuri.www.CreateAccountCheckingResponseCodec@b1dd4
ENTRY 2:
class: org.openuri.www.FundingInfoAnonType
xsd_type: ['http://www.openuri.org/']:lcl0:FundingInfoAnonType
ser: org.openuri.www.FundingInfoAnonTypeCodec@1d36711
deser: org.openuri.www.FundingInfoAnonTypeCodec@13a59e
ENTRY 3:
class: org.openuri.www.AccountInfoAnonType
xsd_type: ['http://www.openuri.org/']:lcl0:AccountInfoAnonType
ser: org.openuri.www.AccountInfoAnonTypeCodec@1de5959
deser: org.openuri.www.AccountInfoAnonTypeCodec@bbf788
ENTRY 4:
class: org.openuri.www.CustomerInfoAnonType
xsd_type: ['http://www.openuri.org/']:lcl0:CustomerInfoAnonType
ser: org.openuri.www.CustomerInfoAnonTypeCodec@7824f9
deser: org.openuri.www.CustomerInfoAnonTypeCodec@1c35fe1
ENTRY 5:
class: org.openuri.www.CreateAccountCheckingRequest
xsd_type: ['http://www.openuri.org/']:lcl0:CreateAccountCheckingRequest
ser: org.openuri.www.CreateAccountCheckingRequestCodec@1cbcd7b
deser: org.openuri.www.CreateAccountCheckingRequestCodec@11f60ce
Java Control for the web service:
package controls;
import weblogic.webservice.context.WebServiceContext;
* @jc:location http-url="http://localhost:7001/Checking.jws"
* @jc:wsdl file="#CheckingWsdl"
* @jc:handler callback="MessageHandler" operation="MessageHandler"
public interface CheckingService extends com.bea.control.ControlExtension, com.bea.control.ServiceControl
public static class CustomerInfo
implements java.io.Serializable
public java.lang.String FirstName;
public java.lang.String LastName;
public java.lang.String MiddleName;
public int SSN;
public int CustomerNumber;
public java.util.Calendar CreationDate;
public java.util.Calendar LastModifiedDate;
public static class FundingInfo
implements java.io.Serializable
public float Amount;
public java.util.Calendar CurrentDate;
public int AccountNumber;
public static class anyType
implements java.io.Serializable
public com.bea.xml.XmlObject[] t;
public static class AccountInfo
implements java.io.Serializable
public int AccountNumber;
public float Balance;
public int CustomerNumber;
public java.util.Calendar LastModifiedDate;
public WebServiceContext context = CheckingService.context;
* @jc:protocol form-post="false" form-get="false"
public AccountInfo CreateAccountChecking (CustomerInfo CustomerInfo, FundingInfo FundingInfo, anyType CommonHeader);
static final long serialVersionUID = 1L;
/** @common:define name="CheckingWsdl" value::
<?xml version="1.0" encoding="utf-8"?>

<definitions xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:conv="http://www.openuri.org/2002/04/soap/conversation/" xmlns:cw="http://www.openuri.org/2002/04/wsdl/conversation/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:jms="http://www.openuri.org/2002/04/wsdl/jms/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:s0="http://www.openuri.org/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" targetNamespace="http://www.openuri.org/">
<types>
<s:schema targetNamespace="http://www.openuri.org/" xmlns:s="http://www.w3.org/2001/XMLSchema">
<s:element name="CreateAccountCheckingRequest">
<s:complexType>
<s:sequence>
<s:element name="CustomerInfo">
<s:complexType>
<s:sequence>
<s:element name="FirstName" type="s:string" nillable="false"/>
<s:element name="LastName" type="s:string" nillable="false"/>
<s:element name="MiddleName" type="s:string" nillable="true"/>
<s:element name="SSN" type="s:int"/>
<s:element name="CustomerNumber" type="s:int"/>
<s:element name="CreationDate" type="s:dateTime"/>
<s:element name="LastModifiedDate" type="s:dateTime"/>
</s:sequence>
</s:complexType>
</s:element>
<s:element name="FundingInfo">
<s:complexType>
<s:sequence>
<s:element name="Amount" type="s:float"/>
<s:element name="CurrentDate" type="s:dateTime"/>
<s:element name="AccountNumber" type="s:int"/>
</s:sequence>
</s:complexType>
</s:element>
<s:element name="CommonHeader" type="s:anyType"/>
</s:sequence>
</s:complexType>
</s:element>
<s:element name="CreateAccountCheckingResponse">
<s:complexType>
<s:sequence>
<s:element name="AccountInfo">
<s:complexType>
<s:sequence>
<s:element name="AccountNumber" type="s:int"/>
     <s:element name="Balance" type="s:float"/>
     <s:element name="CustomerNumber" type="s:int"/>
     <s:element name="LastModifiedDate" type="s:dateTime"/>
</s:sequence>
</s:complexType>
</s:element>
</s:sequence>
</s:complexType>
</s:element>
<s:element name="string" nillable="true" type="s:string"/>
</s:schema>
</types>
<message name="CreateAccountCheckingSoapIn">
<part name="parameters" element="s0:CreateAccountCheckingRequest"/>
</message>
<message name="CreateAccountCheckingSoapOut">
<part name="parameters" element="s0:CreateAccountCheckingResponse"/>
</message>
<portType name="CheckingSoap">
<operation name="CreateAccountChecking">
<input message="s0:CreateAccountCheckingSoapIn"/>
<output message="s0:CreateAccountCheckingSoapOut"/>
</operation>
</portType>
<binding name="CheckingSoap" type="s0:CheckingSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<operation name="CreateAccountChecking">
<soap:operation soapAction="http://www.openuri.org/CreateAccountChecking" style="document"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
</binding>
<service name="Checking">
<port name="CheckingSoap" binding="s0:CheckingSoap">
<soap:address location="http://localhost:7001/Checking.jws"/>
</port>
</service>
</definitions>
FOLLOWING IS THE PROXY CLASS THAT IS UNSUCCESSFUL
import controls.CheckingService.anyType;
import java.util.ArrayList;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.rpc.handler.HandlerInfo;
import javax.xml.rpc.handler.HandlerRegistry;
import org.openuri.CreateAccountCheckingResponseDocument.CreateAccountCheckingResponse;
import org.openuri.www.CustomerInfoAnonType;
import org.openuri.www.FundingInfoAnonType;
import weblogic.jws.proxies.*;
import weblogic.webservice.context.WebServiceContext;
import weblogic.webservice.context.WebServiceSession;
import weblogic.webservice.core.handler.WSSEClientHandler;
import weblogic.webservice.tools.pagegen.result;
import weblogic.xml.security.UserInfo;
import weblogic.xml.security.wsse.Security;
import weblogic.xml.security.wsse.SecurityElementFactory;
//import weblogic.jws.proxies.WebServiceB;
//import weblogic.jws.proxies.WebServiceB_Impl;
//import weblogic.jws.proxies.WebServiceBSoap;
public class CheckingWSProxy
public static void CallWS(Controller.CreateAccountCheckingForm form)
String user;
String pass;
try{
* Instantiate the main proxy class. The proxy class has the same name as the
* web service, with "_Impl" appended.
Checking myservice = new Checking_Impl("http://localhost:7001/ConsumerAccountApp/schemas/CheckingService.wsdl");
WebServiceContext context = myservice.context();
WebServiceSession session = context.getSession();
* Registers a handler for the SOAP message traffic.
HandlerRegistry registry = myservice.getHandlerRegistry();
List list = new ArrayList();
list.add(new HandlerInfo(WSSEClientHandler.class, null, null));
registry.setHandlerChain(new QName("Checking"), list);
* Set the username and password token for SOAP message sent from the client, through
* the proxy, to the web service.
user = form.getUsername();
pass = form.getPassword();
UserInfo ui = new UserInfo(user, pass);
session.setAttribute(WSSEClientHandler.REQUEST_USERINFO, ui);
* Adds the username / password token to the SOAP header.
SecurityElementFactory factory = SecurityElementFactory.getDefaultFactory();
Security security = factory.createSecurity(null);
security.addToken(ui);
session.setAttribute(WSSEClientHandler.REQUEST_SECURITY, security);
* Get the protocol-specific proxy class.
CheckingSoap msg=myservice.getCheckingSoap();
* Invoke the web service method
msg.createAccountChecking((CustomerInfoAnonType)form.getProxyCustomerInfo(), (FundingInfoAnonType)form.getProxyFundingInfo(), (Object)form.get_CommonHeader());
catch (Exception ex)
System.out.println("Caught Exception Calling the Web Service from the Proxy. The Exception is the following: " + ex.toString());
FOLLOWING IS THE FORMBEAN IN THE CONTROLLER.JPF FILE
* FormData get and set methods may be overwritten by the Form Bean editor.
public static class CreateAccountCheckingForm extends FormData
private anyType _CommonHeader;
private controls.CheckingService.FundingInfo _FundingInfo;
private controls.CheckingService.CustomerInfo _CustomerInfo;
private java.util.Date dOut;
private java.util.Calendar cOut;
private CustomerInfo proxyCustomerInfo;
private FundingInfo proxyFundingInfo;
private String stringDate;
private String currentDate;
private String lastModifiedDate;
private String creationDate;
private String systemMessage;
private String username;
private String password;
private String accountType;
private String trashTransferAccount;
private String trashAccountNumber;
private boolean secureFlag;
public void set_CustomerInfo(controls.CheckingService.CustomerInfo _CustomerInfo)
_CustomerInfo.CreationDate = parseDate(getCreationDate());
_CustomerInfo.LastModifiedDate = parseDate(getLastModifiedDate());
this._CustomerInfo = _CustomerInfo;
public controls.CheckingService.CustomerInfo get_CustomerInfo()
if(this._CustomerInfo == null)
this._CustomerInfo = new controls.CheckingService.CustomerInfo();
_CustomerInfo.CreationDate = dateNow();
_CustomerInfo.LastModifiedDate = dateNow();
return this._CustomerInfo;
public CustomerInfo getProxyCustomerInfo()
this.proxyCustomerInfo = (CustomerInfo)this._CustomerInfo;
return this.proxyCustomerInfo;
public void set_FundingInfo(controls.CheckingService.FundingInfo _FundingInfo)
_FundingInfo.CurrentDate = parseDate(getCurrentDate());
this._FundingInfo = _FundingInfo;
public controls.CheckingService.FundingInfo get_FundingInfo()
if(this._FundingInfo == null)
this._FundingInfo = new controls.CheckingService.FundingInfo();
_FundingInfo.CurrentDate = dateNow();
return this._FundingInfo;
public FundingInfo getProxyFundingInfo()
this.proxyFundingInfo = (FundingInfo)this._FundingInfo;
return this.proxyFundingInfo;
public void set_CommonHeader(anyType _CommonHeader)
this._CommonHeader = _CommonHeader;
public anyType get_CommonHeader()
if(this._CommonHeader == null)
this._CommonHeader = new anyType();
return this._CommonHeader;
public java.util.Calendar dateNow()
this.dOut = new Date();
Calendar cOut = this.cOut.getInstance();
cOut.setTime(this.dOut);
this.cOut = cOut;
return this.cOut;
public java.util.Calendar parseDate( String strDate )
SimpleDateFormat df4 = new SimpleDateFormat( "MM/dd/yyyy" );
Calendar cOut = this.cOut;
df4.setLenient( false );
try
this.dOut = df4.parse( strDate );
} catch ( ParseException e )
cOut.getInstance();
cOut.setTime(dOut);
this.cOut = cOut;
return this.cOut;
public void setStringDate( String stringDate )
this.stringDate = stringDate;
public String getStringDate()
return this.stringDate;
public void setCurrentDate( String currentDate )
this.currentDate = currentDate;
public String getCurrentDate()
SimpleDateFormat df4 = new SimpleDateFormat( "MM/dd/yyyy" );
this.currentDate = df4.format(_FundingInfo.CurrentDate.getTime());
return this.currentDate;
public void setLastModifiedDate( String lastModifiedDate )
this.lastModifiedDate = lastModifiedDate;
public String getLastModifiedDate()
SimpleDateFormat df4 = new SimpleDateFormat( "MM/dd/yyyy" );
this.lastModifiedDate = df4.format(_CustomerInfo.LastModifiedDate.getTime());
return this.lastModifiedDate;
public void setCreationDate( String creationDate )
this.creationDate = creationDate;
public String getCreationDate()
SimpleDateFormat df4 = new SimpleDateFormat( "MM/dd/yyyy" );
this.creationDate = df4.format(_CustomerInfo.CreationDate.getTime());
return this.creationDate;
public void setUsername( String username )
this.username = username;
public String getUsername()
return this.username;
public void setPassword( String password )
this.password = password;
public String getPassword()
return this.password;
public void setAccountType( String accountType )
this.accountType = accountType;
public String getAccountType()
return this.accountType;
public void setTrashTransferAccount( String trashTransferAccount )
this.trashTransferAccount = trashTransferAccount;
public String getTrashTransferAccount()
return this.trashTransferAccount;
public void setTrashAccountNumber( String trashAccountNumber )
this.trashAccountNumber = trashAccountNumber;
public String getTrashAccountNumber()
return this.trashAccountNumber;
public void setSystemMessage( String systemMessage )
this.systemMessage = systemMessage;
public String getSystemMessage()
return this.systemMessage;
public void setSecureFlag( boolean secureFlag )
this.secureFlag = secureFlag;
public boolean getSecureFlag()
return this.secureFlag;
}

This exception means that xml namespaces are different.
Etc. soap has xml element which doesn't belong to namespace of parent xml element and namespace is set without prefix.
I had such problem.
Try to set namespace prefix for this element.
Example:
<el1>
<el2 xmlns="http://..."/>
</el1>
Should be
<el1>
<q:el2 xmlns:q="http://..."/>
</el1>

Java.rmi.ServerException Problem

The exception that has occured is java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: Process00Impl_Stub
I have the interface, Client, Server and the Implementation java files
in the same machine.
11/29/2002 08:52p 282 Process00.class
11/29/2002 08:25p 221 Process00.java
11/29/2002 07:40p 215 Process00.java.bak
11/29/2002 08:56p 1,008 Process00Client.java
11/29/2002 08:55p 1,010 Process00Client.java.bak
11/29/2002 08:57p 451 Process00Impl.class
11/29/2002 08:57p 936 Process00Impl.java
11/29/2002 08:52p 934 Process00Impl.java.bak
11/29/2002 08:57p 2,153 Process00Impl_Skel.class
11/29/2002 08:57p 3,938 Process00Impl_Stub.class
11/29/2002 08:56p 995 Process00Server.class
11/29/2002 08:57p 645 Process00Server.java
11/29/2002 08:56p 643 Process00Server.java.bak
I also have the _Stub.class. I do not know why I get this error. If any
one have an idea, kindly share with me.
Thanks.

Hi,
I had the same problem. In my machine, path was having jre1.1.7 before my jdk 1.4. So it was picking up from jre1.1.7.
Java was happy when I moved my jdk1.4 path to the beginning of the path variable.
Hope this helps you.

RMI SSL problem

Hi, I am learning RMI whit SSL and I have a problem, I cant run the example form the RMI SSL tutorials.
I can run the server, and bind the object but the client throw this exception:
HelloClient exception: error during JRMP connection establishment; nested exception is:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:274)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:306)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at HelloClient.main(HelloClient.java:60)...
can you help me???

Hi,
Dis you solved the probelm ? I am facing the similar exception. I am using jre1.5.0_11.
Regards,
Titas Mutsuddy

RMI connectivity problem (multi-NIC)

I'm developing a simple photo share program with Java RMI.
I connect rmiregistry (192.168.100.3), it returns the object reference, but when I invoke a method I get problems.
My server (remote) - 192.168.100.3 - reply with an address of another NIC - 192.168.62.1 (from VMware). I print out the Proxy object, and I was surprised when I saw 192.167.62.1 address, instead 192.168.100.3. My client is running on 192.168.100.1 address.
Why is this happening?
When I turned off the VMware virtual NICs, I was successful. I want to understand what is going on, and if is there a way to fix this issue.
$ java rmi.Client
Looking...object found!
Proxy[PhotoShare,RemoteObjectInvocationHandler[UnicastRef [liveRef: [endpoint:[192.168.62.1:58343](remote),objID:[4cc5973e:11de2bb065b:-7fff, 4037313925566802436]]]]]
Exception in thread "main" java.rmi.ConnectIOException: Exception creating connection to: 192.168.62.1; nested exception is:
     java.net.SocketException: Network is unreachable
     at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:614)
     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.listaFotos(Unknown Source)
     at rmi.Client.main(Client.java:26)
Caused by: java.net.SocketException: Network is unreachable
     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)
     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
     at java.net.Socket.connect(Socket.java:519)
     at java.net.Socket.connect(Socket.java:469)
     at java.net.Socket.<init>(Socket.java:366)
     at java.net.Socket.<init>(Socket.java:180)
     at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
     at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
     at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
     ... 7 moreEdited by: pantony on Nov 28, 2008 3:26 AM
Edited by: pantony on Nov 28, 2008 3:27 AM

See item A.1 of the [RMI FAQ|http://java.sun.com/j2se/1.5.0/docs/guide/rmi/faq.html].

RMI observer problem

Hello
I want to write a client server application using rmi and eclipse, where many clients are able to register to the server. The server has a string attribute and a client should be able to pass a string object to the server and the server replaces the value of his attribute with the sent string and notifies all registered clients of the new value. In a later step the server writes to a mysql database and notifies the clients about changes in the database, but that is later...
I use eclipse for developing.
Here is the remoteinterface of the server:
package com.iz.rmi.server;
import java.rmi.*;
import java.rmi.server.*;
import com.iz.rmi.client.IObserver;
public interface ISubject extends Remote
     public void registerClient(IObserver obs) throws RemoteException, ServerNotActiveException;
     public void notifyObervers() throws RemoteException, ServerNotActiveException;
} the remoteinterface of the client:
package com.iz.rmi.client;
import java.rmi.*;
import java.rmi.server.*;
public interface IObserver extends Remote
     public void sendNotify(String notification) throws RemoteException, ServerNotActiveException;
}the implementation of the server interface:
package com.iz.rmi.server;
import java.net.MalformedURLException;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.util.*;
import com.iz.rmi.client.*;
public class Subject extends UnicastRemoteObject implements ISubject
     private Vector<IObserver> obs;
     private String service;
     public Subject() throws java.rmi.RemoteException
          super();
          this.obs = new Vector<IObserver>();
     @Override
     public void notifyObervers() throws RemoteException, ServerNotActiveException
          Iterator<IObserver> obsIt = this.obs.iterator();
          while(obsIt.hasNext())
               IObserver o = obsIt.next();
               try
                    o.sendNotify("blabla");
               catch (Exception e)
                    e.printStackTrace();
     @Override
     public void registerClient(IObserver obs) throws RemoteException, ServerNotActiveException
          System.out.println("client registered");
          this.obs.add(obs);
     public static void main(String[] args)
          if (System.getSecurityManager() == null)
            System.setSecurityManager(new SecurityManager());
          try
            String name = "Observable";
            ISubject engine = new Subject();
            //ISubject stub = (ISubject) UnicastRemoteObject.exportObject(engine, 0);
            LocateRegistry.createRegistry(1099);
            Registry registry = LocateRegistry.getRegistry(1099);
            registry.rebind(name, engine);
            System.out.println("ComputeEngine boundlll");
          catch (Exception e)
            System.err.println("ComputeEngine exception:");
            e.printStackTrace();
} and the implementation of the client interface
package com.iz.rmi.client;
import java.rmi.*;
import java.rmi.server.*;
import com.iz.rmi.server.*;
public class Observer extends UnicastRemoteObject implements IObserver
     private String host;
     private String service;
     private ISubject sub;
     public Observer(String host, String service) throws RemoteException
          this.host = host;
          this.service = service;
          System.out.println("Service: " + service);
          try
               this.sub = (ISubject) Naming.lookup(this.service);
               this.sub.registerClient(this);
               System.out.println(" istered");
          catch(Exception e)
               System.out.println("Unable to connect and register with subject.");
               e.printStackTrace();
     @Override
     public void sendNotify(String notification) throws RemoteException,
               ServerNotActiveException
     public static void main(String[] args)
          try {
               new Observer("192.168.1.34:1099", "Observable");
          } catch (RemoteException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
}Both programs get started with this vm-argument:
-Djava.security.policy=C:\daten\noSpring\Obsv\wideopen.policy
where wideopen.policy looks like this for testing:
grant {
     // Allow everything for now
     permission java.security.AllPermission;
};when I start the server all looks fine, but when I start the a client i become just the output.
Service: Observable
isteredinstead of
Service: Observable
client registerd
isteredThere are no exceptions or something like that, but it seems that the registerClient()-method does not get called on the server when the client starts. There were many changes since the last time I used rmi, so I don't know what's wrong here. I hope some one can help me with this problem.
Kind regards,
Michael

The server's System.out.prints will go to the server's console on the server host.
Not interleaved wih the client's output on the client's console on the client host.

Got a RMI Client problem

HI all im really not sure how to fix this error that im having, to be honest im not really sure what i have done wrong, or where im going wrong with pulling information from my interface or and implimentation.
Okies here is all the code
Interface:
public interface RMIServ
extends java.rmi.Remote {
public String PassCheck(String pass, String user)
throws java.rmi.RemoteException;
Implimentation:
public class RMIServImpl
extends
     java.rmi.server.UnicastRemoteObject
implements RMIServ {
// Implementations must have an
//explicit constructor
// in order to declare the
//RemoteException exception
public RMIServImpl()
throws java.rmi.RemoteException {
super();
     public String PassCheck(String pass, String user)//takes the user and switch number
throws java.rmi.RemoteException {
     String result;
     int password = Integer.parseInt(pass);//converts the string to an int
          int info = Integer.parseInt(user);//converts the string to an int
if (password==72)//checks password
     switch(info)                         //start switch.
          case 1: result="Hello my name is Gareth Gates.";break;
          case 2: result= "My student number is 0302814.";break;
          case 3: result= "I am Taking Computer Science and Robotics.";break;
          case 4: result= "This semester i am taking 4 units, this is one.";break;
          case 5: result= "my project is on server times.";break;
          case 6: result= "i live in luton during the week.";break;
          case 7: result= "i work in a garden centre.";break;
          case 8: result= "please let me know what you think of my server.";break;
          case 9: result= "Email: [email protected]";break;
          case 10: result= "Email me any time, thanks.";break;
          default : result= "You entered a number bigger then 10 please try again.";break;
          }                                        //end switch.
     return result;                         //sends string back to client.
else
     return result= "You entered the wrong password";//send back an error
Server:
import java.rmi.Naming;
public class RMIServServer {
public RMIServServer() {
try {
RMIServ c = new RMIServImpl();
Naming.rebind("rmi://localhost:1099/RMIServService", c);
} catch (Exception e) {
System.out.println("Trouble: " + e);
public static void main(String args[]) {
new RMIServServer();
Client:
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.net.MalformedURLException;
import java.rmi.NotBoundException;
import javax.swing.*;
public class RMIServClient {
public static void main(String[] args) {
try {
RMIServ c = (RMIServ)
Naming.lookup("rmi://localhost/RMIServService");
String password = JOptionPane.showInputDialog("Please enter your password");
if (password == c.PassCheck(pass)){
JOptionPane.showMessageDialog(null, "Password Correct");
catch (MalformedURLException murle) {
System.out.println();
System.out.println(
"MalformedURLException");
System.out.println(murle);
catch (RemoteException re) {
System.out.println();
System.out.println(
"RemoteException");
System.out.println(re);
catch (NotBoundException nbe) {
System.out.println();
System.out.println(
"NotBoundException");
System.out.println(nbe);
catch (
java.lang.ArithmeticException
ae) {
System.out.println();
System.out.println(
"java.lang.ArithmeticException");
System.out.println(ae);
Any light that you could shed on my problem would be much appreciated, thanks for the help in advance
the bold is where my problem lies
Joe de Ronde
Message was edited by:
joederonde

try
String password = JOptionPane
          .showInputDialog("Please enter your password");
if (password == c.PassCheck(password, "username")) {
     JOptionPane.showMessageDialog(null, "Password Correct");
}Also your implementation is wrong, you better take a look at some examples (like the java tutorial, including the rmi tutorial, or if you're using eclipse there are some working ready to use examples in the rmi plugin for eclipse (google it).

RMI Exception

I'm getting an ExportException coming from one class (SGJmsWriter) but not from the other classes I have that are basically the same thing. I've looked all around for a resolution to this problem, and I solved one problem where I hadn't called connection.start(), but I still have this one. Basically, I have multiple threads on the same box going to the virtual machine for JMS stuff. I have at least 2 other threads that are connecting in the same way that don't throw an exception. Any help is appreciated.
connectionFactory = new ActiveMQConnectionFactory(
               ActiveMQConnection.DEFAULT_USER,
               ActiveMQConnection.DEFAULT_PASSWORD, "vm://localhost");
         connection = connectionFactory.createQueueConnection();
         connection.start();
         session = connection.createQueueSession(false,
               QueueSession.AUTO_ACKNOWLEDGE);
         queue = session.createQueue(QUEUE_NAME);
         producer = session.createProducer(queue);
         producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
java.rmi.server.ExportException: internal error: ObjID already in use
     at sun.rmi.transport.ObjectTable.putTarget(Unknown Source)
     at sun.rmi.transport.Transport.exportObject(Unknown Source)
     at sun.rmi.transport.tcp.TCPTransport.exportObject(Unknown Source)
     at sun.rmi.transport.tcp.TCPEndpoint.exportObject(Unknown Source)
     at sun.rmi.transport.LiveRef.exportObject(Unknown Source)
     at sun.rmi.server.UnicastServerRef.exportObject(Unknown Source)
     at sun.rmi.registry.RegistryImpl.setup(Unknown Source)
     at sun.rmi.registry.RegistryImpl.<init>(Unknown Source)
     at java.rmi.registry.LocateRegistry.createRegistry(Unknown Source)
     at org.apache.activemq.broker.jmx.ManagementContext.createConnector(ManagementContext.java:382)
     at org.apache.activemq.broker.jmx.ManagementContext.findMBeanServer(ManagementContext.java:301)
     at org.apache.activemq.broker.jmx.ManagementContext.getMBeanServer(ManagementContext.java:154)
     at org.apache.activemq.broker.jmx.ManagementContext.start(ManagementContext.java:78)
     at org.apache.activemq.broker.BrokerService.start(BrokerService.java:391)
     at org.apache.activemq.transport.vm.VMTransportFactory.doCompositeConnect(VMTransportFactory.java:113)
     at org.apache.activemq.transport.vm.VMTransportFactory.doConnect(VMTransportFactory.java:52)
     at org.apache.activemq.transport.TransportFactory.doConnect(TransportFactory.java:43)
     at org.apache.activemq.transport.TransportFactory.connect(TransportFactory.java:77)
     at org.apache.activemq.ActiveMQConnectionFactory.createTransport(ActiveMQConnectionFactory.java:227)
     at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:242)
     at org.apache.activemq.ActiveMQConnectionFactory.createActiveMQConnection(ActiveMQConnectionFactory.java:211)
     at org.apache.activemq.ActiveMQConnectionFactory.createQueueConnection(ActiveMQConnectionFactory.java:173)
     at com.gdc4s.muos.nms.fcap.fmtds.source.SGJmsWriter.initialize(SGJmsWriter.java:130)
     at com.gdc4s.muos.nms.fcap.fmtds.source.SGJmsWriter.run(SGJmsWriter.java:167)
     at java.lang.Thread.run(Unknown Source)

You are trying to start two Registries in the same JVM.

Java.rmi.NoSuchObjectException problems

Hello,
After calling home.create() in my code, passing in primary key and
additional column data, when I call home.findByPrimaryKey (primkey)
followed by a call to one of the methods in the bean, I immediately get
a a java.rmi.NoSuchObjectException.
An exception is not thrown when calling home.findByPrimaryKey (primkey)
so it is safe to assume that a reference has been obtained to the bean
with the data I am looking for, correct? If so, why am I getting this
exception:
java.rmi.NoSuchObjectException: Bean with primary key: 'Pat Hardy' not
found in
home: 'Student'
at
weblogic.ejb.internal.EntityEJBContext.load(EntityEJBContext.java:153
at
weblogic.ejb.internal.EntityEJBContext.afterBegin(EntityEJBContext.ja
va:212)
at
weblogic.ejb.internal.StatefulEJBObject.getContextForInvoke(StatefulE
JBObject.java:162)
etc.
etc.
etc.
Any ideas of what I might be doing wrong?
Thanks for your help in advance.

We had a similar problem, although I don't know if it was the same
thing. We are using WL 5.1, sp5, with Oracle 8.1.6.
I have a stateless session bean, which had a transactional attribute
of 'Supports'. It would call an entity bean with transactional attribute
of 'RequiresNew' for all methods. The session bean would do a finder
on the entity bean, and if it got an ObjectNotFoundException, it would
then create the entity bean with a call to home.create(id). Then, it would
call a business method on the entity bean.
For some reason, in the case where the session bean is called from within
a thread that already had a transaction started, the call to the entity
bean business method would hang, if an only if it had to create a new
bean first. If the finder of the bean succeeded, there would be no hang.
Sometimes, instead of hanging, it would return a NoSuchObjectException.
If the stateless bean were called outside of a transaction, would always
succeed, regardless.
So, my fix, was to set the transactional attribute for the stateless bean to
'NotSupported' for all methods. It now seems to work in all cases,
no more hangs or NoSuchObjectExceptions....
Is this expected behavior? Is this related to the same problem?
The BEA recomendations to use READ-COMMITTED are useless for
the case where you are running a clustered environment, and where you
need to have the bean deployed on all servers in the cluster for
fail-over reliability.....
Jason
"Korey Shronts" <[email protected]> wrote in message
news:[email protected]...
I dont' know about the mapping to CHAR but we've managed to fix our nosuch
object problem.
BEA sent me this snippet:
The bug is as follows
In Oracle (8.0.5), if there is a primary key constraint AND you use an
isolation
level of SERIALIZABLE, an insert followed by an update in the same
transaction
fails. Specifically, the insert succeeds (to all outward indications),
but the update fails (the returned count is 0) after some number of
iterations.
What's the workaround? If the customer is not sharing the database with
any
other app or running it under a cluster, tell them to set the isolation
level to
read_committed. Serializable only slows them down without any added
benefit.
If clustering is on, and serializable behavior is deemed essential for
this
particular bean, maybe they can deploy the bean on only one of the
servers
to reduce it to the case above.
I set the isolation level on our beans to read_commited. Fixed theproblem
although we're using Oracle 8i not 8.0.5.
<[email protected]> wrote in message
news:[email protected]...
Well, it appears, that you cannot map a java.lang.String to a CHAR inOracle.
A java.lang.String can be mapped to a VARCHAR2.
Is this a bug?
[email protected] wrote:
I just install WebLogic server 5.1.0 and SP5 on a new machine.
Still have the same problems.
Will keep you posted.
Korey Shronts wrote:
We're having the same problem. I've opened a case with BEA but
haven't
heard anything yet. If you find the solution let me know!
[email protected]
<[email protected]> wrote in message
news:[email protected]...
I accidently omitted the first line in the exception. Sorry aboutthat.
Here it is again from the beginning:
Thu Sep 21 08:52:12 EDT 2000:<I> <EJB JAR deploymentC:/wlogic/lib/S.jar>
Transa
ction: '969540638993_1' rolled back due to EJB exception:
java.rmi.NoSuchObjectException: Bean with primary key: 'Pat Hardy'not
found in
home: 'Student'
at
weblogic.ejb.internal.EntityEJBContext.load(EntityEJBContext.java:153
at
weblogic.ejb.internal.EntityEJBContext.afterBegin(EntityEJBContext.ja
va:212)
at
weblogic.ejb.internal.StatefulEJBObject.getContextForInvoke(StatefulE
JBObject.java:162)
etc.
etc.
etc.
Any ideas of what I might be doing wrong?
Thanks for your help in advance.
[email protected] wrote:
Hello,
After calling home.create() in my code, passing in primary key
and
additional column data, when I call home.findByPrimaryKey(primkey)
followed by a call to one of the methods in the bean, Iimmediately get
a a java.rmi.NoSuchObjectException.
An exception is not thrown when calling home.findByPrimaryKey(primkey)
so it is safe to assume that a reference has been obtained to
the
bean
with the data I am looking for, correct? If so, why am I gettingthis
exception:
java.rmi.NoSuchObjectException: Bean with primary key: 'Pat
Hardy'
not
found in
home: 'Student'
at
weblogic.ejb.internal.EntityEJBContext.load(EntityEJBContext.java:153
at
weblogic.ejb.internal.EntityEJBContext.afterBegin(EntityEJBContext.ja
va:212)
at
weblogic.ejb.internal.StatefulEJBObject.getContextForInvoke(StatefulE
JBObject.java:162)
etc.
etc.
etc.
Any ideas of what I might be doing wrong?
Thanks for your help in advance.

RMI activation problem under LINUX

When I try to run the activation example from the RMI tutorial, I get the following exception:
Exception in thread "main" java.rmi.activation.ActivationException: ActivationSystem not running; nested exception is:
java.rmi.NotBoundException: java.rmi.activation.ActivationSystem
at java.rmi.activation.ActivationGroup.getSystem(ActivationGroup.java:453)
at examples.activation.Setup.main(Setup.java:68)
Caused by: java.rmi.NotBoundException: java.rmi.activation.ActivationSystem
at sun.rmi.registry.RegistryImpl.lookup(RegistryImpl.java:106)
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:342)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:207)
at sun.rmi.transport.Transport$1.run(Transport.java:148)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:536)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:350)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:84)
at java.rmi.activation.ActivationGroup.getSystem(ActivationGroup.java:449)
... 1 more
This is with J2SE 1.4.1 on RedHat 7.3 running a vanilla 2.4.18 kernel. I'm running everything out of shell scripts to keep from getting bitten by typos.
Here's the punchline: The identical code works just fine on RedHat 6.2 (kernel 2.2.14 or so) - same 1.4.1.
Netstat tells me there is something listening on the appropriate ports, and output from strace suggests that there is some traffic back and forth to the server. There is no firewall running - I unloaded ipchains in the interest of paranoia. (There is firewalling running on the working system, go figure...)
Help? I can post more details if that would help resolve the problem.

I wrote
When I try to run the activation example from the RMI
tutorial, I get the following exception:<snip>
The key was this:
The identical code works just
fine on RedHat 6.2 (kernel 2.2.14 or so) - same 1.4.1."Identical" really was - I'd used a tar archive to make a complete copy of the code running on the RH 6.2 system. The copy included the file log/Logfile.1, written by rmid (or rmiregistry). This contains lots of IP addresses; I suspect it's more than a log. Since the original machine and the clone are separated by a firewall, attempts by the clone to contact the original failed.
Deleting the "log" directory made the problem go away.

RMI Exceptions

Hello, I am new to java RMI,
I have written a simple program, I can run Server without problems, but when I try to run Client I get these exceptions:
Exception in thread "main" java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:13371 connect,resolve)
     at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
     at java.security.AccessController.checkPermission(AccessController.java:546)
     at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
     at java.lang.SecurityManager.checkConnect(SecurityManager.java:1034)
     at java.net.Socket.connect(Socket.java:519)
     at java.net.Socket.connect(Socket.java:475)
     at java.net.Socket.<init>(Socket.java:372)
     at java.net.Socket.<init>(Socket.java:186)
     at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
     at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
     at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
     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.newCall(UnicastRef.java:322)
     at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
     at Client.<init>(Client.java:47)
     at Client.main(Client.java:104)Here is my "Communication" interface:
import java.rmi.*;
public interface Communication extends Remote{
     public void receiveUsername(String username) throws RemoteException;
     public void receivePassword(String password) throws RemoteException;
}Here is the part of my Server class:
System.setSecurityManager(new RMISecurityManager());
try {
     address_ = (InetAddress.getLocalHost()).toString();
} catch (UnknownHostException e) {
     e.printStackTrace();
     System.exit(1);
port_ = 13371;
try {
     registry_ = LocateRegistry.createRegistry(port_);
     registry_.rebind("MyServer", this);
} catch (RemoteException e) {
     e.printStackTrace();
     System.exit(1);
System.out.println("Server succesfully started...");
System.out.println("{Address = " + address_ + ", port = " + port_ + "}");
System.out.println("Waiting for tasks...");Here is the part of my Client class:
System.setSecurityManager(new RMISecurityManager());
System.out.println("Trying to connect to " + SERVER_ADDRESS + " via " + PORT);
try {
     registry_ = LocateRegistry.getRegistry(SERVER_ADDRESS, PORT);
     server_ = (Communication) (registry_.lookup("MyServer"));
} catch (RemoteException e) {
     e.printStackTrace();
     System.exit(1);
} catch (NotBoundException e) {
     e.printStackTrace();
     System.exit(1);
}This is how I compile and run my server:
javac Server.java
rmic Server
java Server
This is how I compile and run my client:
javac Client.java
java Client
Can somebody help me to find out what I am doing wrong, and what I need to fix this?
Thanks for any help, I appreciate it.

Alright so, I have specified externally reachable ip, and I got these exceptions on server:
Exception in thread "RMI TCP Connection(idle)" java.security.AccessControlException: access denied (java.net.SocketPermission xxx.xxx.xx.xx:49926 accept,resolve)
     at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
     at java.security.AccessController.checkPermission(AccessController.java:546)
     at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
     at java.lang.SecurityManager.checkAccept(SecurityManager.java:1157)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.checkAcceptPermission(TCPTransport.java:636)
     at sun.rmi.transport.tcp.TCPTransport.checkAcceptPermission(TCPTransport.java:275)
     at sun.rmi.transport.Transport$1.run(Transport.java:158)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
     at java.lang.Thread.run(Thread.java:619)
and exceptions on client side:
java.rmi.UnmarshalException: Error unmarshaling return header; nested exception is:
     java.io.EOFException
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:209)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
     at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
     at Client.<init>(Client.java:47)
     at Client.main(Client.java:104)
Caused by: java.io.EOFException
     at java.io.DataInputStream.readByte(DataInputStream.java:250)
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:195)
     ... 4 more

RMI exception problem

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