Replication on rmi server

Hi,
I m working on rmi client/server chat application and I would like to make my server replicated (e.g having a group of servers), so when it crashes the connection must jump to another server without losing any data and without the client noticing the crashing. I know that there are two kinds of replication (Passive/ active ) but I have no idea how to do it. Is anyone who could help me with this and give me any references(either for passive or active)?
Thanks.
p.s Please is important

Note to others. This is a duplication/continuation of:
[http://forums.sun.com/thread.jspa?threadID=5431836]

Similar Messages

BEA-080003 RuntimeException thrown by rmi server:

Hi,
We have one Admin server and 2 managed servers and we are getting the following error when ever is request is received on the server side . Can any one please prvide a soultion how to over come this problem
<Feb 12, 2009 1:05:57 PM GMT> <Warning> <RMI> <BEA-080003> <RuntimeException thrown by rmi server: weblogic.cluster.replication.ReplicationManager.create(Lweblogic.rmi.spi.HostID;ILweblogic.cluster.replication.ROID;Lweblogic.cluster.replication.Replicatable;)
java.lang.NullPointerException.
java.lang.NullPointerException
     at weblogic.cluster.replication.WrappedRO.addRO(WrappedRO.java:49)
     at weblogic.cluster.replication.ReplicationManager$wroManager.create(ReplicationManager.java:288)
     at weblogic.cluster.replication.ReplicationManager.create(ReplicationManager.java:785)
     at weblogic.cluster.replication.ReplicationManager_WLSkel.invoke(ILweblogic.rmi.spi.InboundRequest;Lweblogic.rmi.spi.OutboundResponse;Ljava.lang.Object;)Lweblogic.rmi.spi.OutboundResponse;(Unknown Source)
     at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
     Truncated. see log file for complete stacktrace
>
<Feb 12, 2009 1:05:57 PM GMT> <Warning> <RMI> <BEA-080003> <RuntimeException thrown by rmi server: weblogic.cluster.replication.ReplicationManager.create(Lweblogic.rmi.spi.HostID;ILweblogic.cluster.replication.ROID;Lweblogic.cluster.replication.Replicatable;)
java.lang.NullPointerException.
java.lang.NullPointerException
     at weblogic.cluster.replication.WrappedRO.addRO(WrappedRO.java:49)
     at weblogic.cluster.replication.ReplicationManager$wroManager.create(ReplicationManager.java:288)
     at weblogic.cluster.replication.ReplicationManager.create(ReplicationManager.java:785)
     at weblogic.cluster.replication.ReplicationManager_WLSkel.invoke(ILweblogic.rmi.spi.InboundRequest;Lweblogic.rmi.spi.OutboundResponse;Ljava.lang.Object;)Lweblogic.rmi.spi.OutboundResponse;(Unknown Source)
     at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
     Truncated. see log file for complete stacktrace
>
<Feb 12, 2009 1:05:57 PM GMT> <Warning> <RMI> <BEA-080003> <RuntimeException thrown by rmi server: weblogic.cluster.replication.ReplicationManager.create(Lweblogic.rmi.spi.HostID;ILweblogic.cluster.replication.ROID;Lweblogic.cluster.replication.Replicatable;)
java.lang.NullPointerException.
java.lang.NullPointerException
     at weblogic.cluster.replication.WrappedRO.addRO(WrappedRO.java:49)
     at weblogic.cluster.replication.ReplicationManager$wroManager.create(ReplicationManager.java:288)
     at weblogic.cluster.replication.ReplicationManager.create(ReplicationManager.java:785)
     at weblogic.cluster.replication.ReplicationManager_WLSkel.invoke(ILweblogic.rmi.spi.InboundRequest;Lweblogic.rmi.spi.OutboundResponse;Ljava.lang.Object;)Lweblogic.rmi.spi.OutboundResponse;(Unknown Source)
     at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
     Truncated. see log file for complete stacktrace
>
<Feb 12, 2009 1:05:57 PM GMT> <Warning> <RMI> <BEA-080003> <RuntimeException thrown by rmi server: weblogic.cluster.replication.ReplicationManager.create(Lweblogic.rmi.spi.HostID;ILweblogic.cluster.replication.ROID;Lweblogic.cluster.replication.Replicatable;)
java.lang.NullPointerException.
java.lang.NullPointerException
     at weblogic.cluster.replication.WrappedRO.addRO(WrappedRO.java:49)
     at weblogic.cluster.replication.ReplicationManager$wroManager.create(ReplicationManager.java:288)
     at weblogic.cluster.replication.ReplicationManager.create(ReplicationManager.java:785)
     at weblogic.cluster.replication.ReplicationManager_WLSkel.invoke(ILweblogic.rmi.spi.InboundRequest;Lweblogic.rmi.spi.OutboundResponse;Ljava.lang.Object;)Lweblogic.rmi.spi.OutboundResponse;(Unknown Source)
     at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
     Truncated. see log file for complete stacktrace

Unless you are in post 9.2mp1 version this is a known issue and fixed. Contact support about BUG8132425

Urgent Help Required For Starting RMI server from servlet.

I am currently working on rmi project.
I want to send request to remote machine(Web host) where my application is from desktop client .For that we are using RMI.
I am writing servlet and inside it i am binding object to registry for rmi server.
which will be deployed on remote server.
code ....
Registry reg;
reg=LocateRegistry.createRegistry(1099);
Server server=new Server("server");//class whose remote object to be accessed
//extends unicast remote object.Implement ServerInt interface which extends Remote.
reg.bind("server",server);
When i am trying to access this object i am getting following exception.
javax.naming.CommunicationException [Root exception is java.rmi.UnmarshalExcepti
on: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: ServerModule.ServerInt]
at com.sun.jndi.rmi.registry.RegistryContext.lookup(Unknown Source)
at com.sun.jndi.toolkit.url.GenericURLContext.lookup(Unknown Source)
at javax.naming.InitialContext.lookup(Unknown Source)
at RequstReplication.main(RequstReplication.java:27)
Caused by: java.rmi.UnmarshalException: error unmarshalling return; nested excep
tion is:
java.lang.ClassNotFoundException: ServerModule.ServerInt
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
... 4 more
Caused by: java.lang.ClassNotFoundException: ServerModule.ServerInt
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyInterfaces(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadProxyClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(Unknown Source)
at java.io.ObjectInputStream.readProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
... 5 more
I can access naming enumeration of registry and object bound to it.
by following program.I shows corect objects.
Context namingContext=new InitialContext();
NamingEnumeration<NameClassPair> e=namingContext.list("rmi:");
while(e.hasMore())
System.out.println(e.next().getName());
While when i start RMI server from simple java program i can access these objects from registry.
I am not getting what is problem problem.Is there any other way to send request?
Plese give quick response.

I am currently working on rmi project.
I want to send request to remote machine(Web host) where my application is from desktop client .For that we are using RMI.
I am writing servlet and inside it i am binding object to registry for rmi server.
which will be deployed on remote server.
code ....
Registry reg;
reg=LocateRegistry.createRegistry(1099);
Server server=new Server("server");//class whose remote object to be accessed
//extends unicast remote object.Implement ServerInt interface which extends Remote.
reg.bind("server",server);
When i am trying to access this object i am getting following exception.
javax.naming.CommunicationException [Root exception is java.rmi.UnmarshalExcepti
on: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: ServerModule.ServerInt]
at com.sun.jndi.rmi.registry.RegistryContext.lookup(Unknown Source)
at com.sun.jndi.toolkit.url.GenericURLContext.lookup(Unknown Source)
at javax.naming.InitialContext.lookup(Unknown Source)
at RequstReplication.main(RequstReplication.java:27)
Caused by: java.rmi.UnmarshalException: error unmarshalling return; nested excep
tion is:
java.lang.ClassNotFoundException: ServerModule.ServerInt
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
... 4 more
Caused by: java.lang.ClassNotFoundException: ServerModule.ServerInt
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyInterfaces(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadProxyClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(Unknown Source)
at java.io.ObjectInputStream.readProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
... 5 more
I can access naming enumeration of registry and object bound to it.
by following program.I shows corect objects.
Context namingContext=new InitialContext();
NamingEnumeration<NameClassPair> e=namingContext.list("rmi:");
while(e.hasMore())
System.out.println(e.next().getName());
While when i start RMI server from simple java program i can access these objects from registry.
I am not getting what is problem problem.Is there any other way to send request?
Plese give quick response.

Database Mirroring and Replication in SQL Server 2008 R2

I have configured the mirroring and replication between 4 servers (A,B,C,D).i.e, Mirroring between A to B and C to D, Replication between A and C. The configuration was a success and I am able test the replication(B to C) when I have failed over the mirroring
dbs(A to B). The replication works fine after the mirroring fail over but I am not able to check its status in the Replication monitor. When I am having any insert in a table which is replicated in B, it is reflected back to C..it means the replication is
working fine.
Any thought on how I can view the status of replication from mirrored server. I tried adding the publisher in the monitor, but no luck. If I check the snapshot agent status, it says could not retrieve the info, same with the log reader agent status.
Any suggestions on this please.
Thanks, Siri

For example in your case...
Server A is principal and Server B is Mirror with either Manual or Automatic Failover.
Server A is replicated to Server B ( publisher & B is subscriber )
In Server A Database named Test_Mirror_Replication is configured for both mirroring and Replication.
Now you have failed over your Database 'Test_Mirror_Replication' from Server A to Server B.
After the Failover Server A will act as Mirror for DB 'Test_Mirror_Replication' & Server B will act as Principal for DB 'Test_Mirror_Replication'
Hope my understanding is correct ?
If yes then have you tried monitoring the replication after registering in other instance with current principal database sql instance name ? I mean current Publisher database name sql instance ? not your old sql instance name which was before the mirroring
role change or failover...
Hope you are trying with mirror database server name ?
Raju Rasagounder MSSQL DBA

Attempting to use SSL over RMI from a web application to a RMI server

Hi,
I am attempting to use SSL over RMI to a server. The client is the web
application that is hosted on WebLogic and that attempts to connect to the
server. There is no client or server verification at either the client or
the server end. The code works outside of WebLogic 7/8 but has the following
issues when running the web application inside weblogic:
java.rmi.ConnectException: Connection refused to host: gkhanna1; nested
exception is:
java.net.ConnectException: Connection refused: connect
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:350)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:137)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:124)
at java.net.Socket.<init>(Socket.java:268)
at java.net.Socket.<init>(Socket.java:95)
at
sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketF
actory.java:20)
at
sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketF
actory.java:115)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:494)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:169)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:313)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:79)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.initConnection(NTLMConne
ctionClient.java:59)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.getUsers(NTLMConnectionC
lient.java:197)
at com.hyperion.css.CSSAPIImpl.getUsers(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at jsp_servlet._jsp._app1.__app1signin._jspService(__app1signin.java:133)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle
tStubImpl.java:1058)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:401)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:445)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:306)
at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5445)
at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3105)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2588)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)
The code at the client that initiates the connection:
socketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket) socketFactory.createSocket(host, port);
socket.setEnabledCipherSuites(CIPHERS);
socket.setEnableSessionCreation(true);
Any ideas?
Thanks

I don't see anything that indicates SSL was directly a factor in the
failure.
From the exception stack it looks like a more basic connectivity issue,
maybe the URL for the
RMI server is incorrect for some reason or the server was down.
It looks like you are doing something like this:
SSL client -> WLS server with servletA, servletA RMI client
(com.hyperion.css) -> RMI server
The connection failure appears to be the connection from servletA RMI client
to the RMI server.
Is that a correct picture?
Tony
"Gaurav Khanna" <[email protected]> wrote in message
news:[email protected]...
Hi,
I am attempting to use SSL over RMI to a server. The client is the web
application that is hosted on WebLogic and that attempts to connect to the
server. There is no client or server verification at either the client or
the server end. The code works outside of WebLogic 7/8 but has thefollowing
issues when running the web application inside weblogic:
java.rmi.ConnectException: Connection refused to host: gkhanna1; nested
exception is:
java.net.ConnectException: Connection refused: connect
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:350)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:137)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:124)
at java.net.Socket.<init>(Socket.java:268)
at java.net.Socket.<init>(Socket.java:95)
at
sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketF
actory.java:20)
at
sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketF
actory.java:115)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:494)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:169)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:313)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:79)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.initConnection(NTLMConne
ctionClient.java:59)
at
com.hyperion.css.spi.impl.ntlm.NTLMConnectionClient.getUsers(NTLMConnectionC
lient.java:197)
at com.hyperion.css.CSSAPIImpl.getUsers(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at com.hyperion.css.CSSAPIImpl.initialize(Unknown Source)
at jsp_servlet._jsp._app1.__app1signin._jspService(__app1signin.java:133)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle
tStubImpl.java:1058)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:401)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:445)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:306)
at
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5445)
at
weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3105)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2588)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)
The code at the client that initiates the connection:
socketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
SSLSocket socket = (SSLSocket) socketFactory.createSocket(host, port);
socket.setEnabledCipherSuites(CIPHERS);
socket.setEnableSessionCreation(true);
Any ideas?
Thanks

Error while registering RMI Server

Hi
I have a system connected to bradband with a static ip. I am planning to use this as the RMI server and any system connected to the internet as the client. Is this possible....?
I tried to bind the name to the registry and I get the following error.
C:\PROGRA~1\Java\jre1.5.0_06\bin>java -Djava.security.policy=policy HelloServer
HelloServer error: Connection refused to host: 59.144.28.215; nested exception i
s:
        java.net.ConnectException: Connection refused: connect
java.rmi.ConnectException: Connection refused to host: 59.144.58.215; nested exc
eption is:
        java.net.ConnectException: Connection refused: connect
        at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
        at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
        at sun.rmi.server.UnicastRef.newCall(Unknown Source)
        at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
        at java.rmi.Naming.rebind(Unknown Source)
        at HelloServer.main(HelloServer.java:18)
Caused by: java.net.ConnectException: Connection refused: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(Unknown Source)
        at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at java.net.Socket.<init>(Unknown Source)
        at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown S
ource)
        at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown S
ource)
        ... 7 moreCan anyone help me by resolving this error.....

what do you mean by intranet address?
If you use some NAT device (e.g, DSL, cable) that it is likely you won't be able to access the registry using the external IP address. In such case you need to open the registry port in the firewall.

Not able to run a simple RMI server

I am running an RMI program like follwing
import java.rmi.* ;
import java.rmi.registry.* ;
import java.rmi.server.* ;
public class CallBeanServer extends UnicastRemoteObject implements ICallBeanServer
     //main
     public static void main(String args[]) throws Exception
          int port = 1000 ;
          Registry reg = null ;
          if( args[0].equals("true"))
               reg = LocateRegistry.createRegistry(port) ;
               System.out.println("Successfully created registry") ;
          else
               reg = LocateRegistry.getRegistry(port) ;
               System.out.println("Connected to existing registry") ;
          CallBeanServer callBeanServer = new CallBeanServer(reg) ;
     }//main
     //constructor
     public CallBeanServer(Registry reg) throws Exception, RemoteException
          super() ;
          reg.rebind("CallBeanServer",this) ;
          System.out.println("CallBeanServer Object bound") ;
     //my public method
     public String callBeanServer() throws RemoteException
     {          return "Success" ;
I have run the rmiregistry at port no 1000 like
rmiregistry 1000
I have compiled ICallBeanServer also and run rmic also over CallBeanServer like
rmic CallBeanServer
when I run this program using
java CallBeanServer false
it gives the follwoing errors
Connected to existing registry
Exception in thread "main" java.rmi.ServerException: Server RemoteException; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: CallBeanServer_Stub
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: CallBeanServer_Stub
java.lang.ClassNotFoundException: CallBeanServer_Stub
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown 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 CallBeanServer.<init>(CallBeanServer.java:38)
at CallBeanServer.main(CallBeanServer.java:30)
Can you please tell me what is the error?
Thanks
Prashant Gupta

Add the classes (the stubs included) to the classpath when you start the registry.

Sql server replication from SQL SERVER VERSION(7.0) to SQL SERVER 2005

Hi All,
We are trying to create a replication between Sql server 7.0 data to SQL server 2005 data . We tried to create a local subscription in Sql server ,when tried to connect to publisher running in Sql server 7.0 it is showing an error message
like "This Sql server vresion(7.0) is not supported" .
Could any one please help us with this issue ?
Thanks
Sandy

Hi CRM_Learner,
SQL Server version 7.0 Service Pack 4 (SP4) is the earliest version that can participate in a replication topology with SQL Server 2005. We need to verify the version of SQL Server. If you configure transactional replication with updating subscribers,
for a SQL Server 7.0 Publisher, only SQL Server 7.0 Subscribers are supported. SQL Server 7.0, 2000 was out of support in the SQL Server Forums. I suggest you install SQL Server 2005 or later version to configure the SQL Server replication.
For more information, there is a detail about using multiple Versions of SQL Server in a replication topology.
http://technet.microsoft.com/en-us/library/ms143241(v=sql.90).aspx
Regards,
Sofiya Li
If you have any feedback on our support, please click here.
Sofiya Li
TechNet Community Support

Removing Replication in SQL Server 2008 R2

Hi,
I had issues to remove replication. I was trying to remove all articles from replication..it was taking quite long time to complete the process and found blocking while doing it. I stopped the SQL agent and tried but still it was slow..to remove 3 tables
from replication it took more than 30mi. Is there any other preriquisites to do for this process. I searched a lot in the web but didn't get proper help.
Thanks.

Hi Swapana,
According to your description, you want remove all articles from transactional replication, however, it exists some blocks which make the removing process slowly. Usually, articles can be dropped from a publication at any time. Replication will stop
replicating the changes in schema/data from publisher to subscriber once you remove article from replication . However, we need to verify if you want to remove tables from the subscriber database, if yes, you have to do it manually after removing object from
replication. For more information, see:
http://blog.extreme-advice.com/2012/11/28/delete-article-from-transactional-replication-in-sql-server-2012/
In addition, if you just want to drop articles from existing publications. For snapshot or transactional publications, articles can be dropped with no special considerations prior to subscriptions being created. When you drop an article that is related to
other published articles through foreign key constraints, we recommend that you drop the table at the Subscriber manually.
If an article is dropped after one or more subscriptions is created, the subscriptions must be dropped, recreated, and synchronized. For more information, see:
http://msdn.microsoft.com/en-us/library/ms152493.aspx
Regards,
Sofiya Li
Sofiya Li
TechNet Community Support

Replication between Oracle Server and MS SQL Server

Hello,
Does anybody know of a well known or reliable software that can do data replication between Oracle Server and Microsoft SQL server.
I suppose I can write my own version using Heterogenous Services in Oracle but I would like to know if such an automated replication between Oracle and SQL is available commercially.
Thank you.

Viacheslav Ostapenko wrote:
Sorry, Aman,
I couldn't find any info about replication to MS SQL. Is it possible at all? Could you provide link where we can read about this? It could be very interesting.Sorry Viacheslav, even I couldn't find anything for the same. I am not sure that it can be done or not, I haven't heard anyone in my contact doing so. The only place where I have seen Streams being used around me is within Oracle db only. May be someone else can help if he/she has done it.
Aman....

Crazy Exception blocked my RMI server

Hi all one crazy exception is thrown when I try to start the server. Plz reply me the the possible cause and solution.
thanks in advance
The exception is :
Error starting service
java.rmi.server.ExportException: Listen failed on port: 0; nested exception is:
java.net.SocketException: JVM_Bind (code=10055)

You cant listen / bind on port 0. Try a different port number greater than 1024. That should work out.

Load balancing on RMI Server Application

Hi there, I'd like to know more detail about load balancing on RMI server application, been digging the web for some time, but couldn't find much information, does anyone know any website or has the knowledge of load balancing on RMI to share? Sort like its design and implementation.
Thanks,
Jax

I want performance and fault-tolerance,
In that case, is it necessary to have a main
rmi server to allow client to access and pick one of
the rmi servers for the client?Well, if you have one main RMI server, you have a single point of failure again.. Why can't your application know about all rmi servers, and randomly choose one? If it's down, pick a different one.. If your applicatoin is an applet, you'll have to sign it.. Do that and put it on 2 redundant web servers. You have performance by splitting the load and you have your fault tolerance by having x identical rmi servers.
If you're saying what I think, why would you have one main rmi server that picks a different rmi server? That's more work AND your redundancy goes byebye, ie if your main rmi server dies..

How to get the IP address of RMI server???

Hi:
Is there a way to know the IP address of RMI server before client and server connect?
I am assuming that client didn't know the IP address of the server.
Because I know that client must hold a server reference so that client can connect to server.
But I want my client program to find out server IP address before they connect and use this finding to connect to server.
Is it possible?
Thanks!

So you KNOW that the client MUST know where the server is yet you want the client to find out where the server is?
Simple answer: forget it.
If you don't know where to connect to how are you ever going to connect to it?
And if you do know you don't have to go looking it up...
You can probably do something with JNDI, but then you're only putting off the inevitable as now you need to both know how to contact the JNDI server AND the JNDI server needs to know where the the RMI registry for the service you want to connect to is.

How do I make a RMI client running in Bea find a remote, non Bea, RMI server?

On my stand alone test system I run a RMI server in one JVM,
registry.exe and a RMI client in its own JVM. The client uses
java.rmi.Naming.lookup() to find the RMI server, and this works fine.
If I run the same RMI client class within Bea the naming lookup fails! I
guess this is due to Bea using it own RMI registry rather than the
registry.exe I started separately(?)
QUESTION: How do I make a RMI client running in Bea find a remote,
non-Bea, RMI server?
Of course, in the final environment the server will run on a system
remote from Bea.
The RMI client calls are done from a servlet, not from a EJB.
The doumentation about using RMI with Bea is focused on running the RMI
server within Bea. This might be the "normal" thing to do, but in our
case Bea is the client, not the server. Do I still need to use
weblogic.rmi.*....? If so, where?
Grateful for any tip.
Göran Hagnell

On my stand alone test system I run a RMI server in one JVM,
registry.exe and a RMI client in its own JVM. The client uses
java.rmi.Naming.lookup() to find the RMI server, and this works fine.
If I run the same RMI client class within Bea the naming lookup fails! I
guess this is due to Bea using it own RMI registry rather than the
registry.exe I started separately(?)
QUESTION: How do I make a RMI client running in Bea find a remote,
non-Bea, RMI server?
Of course, in the final environment the server will run on a system
remote from Bea.
The RMI client calls are done from a servlet, not from a EJB.
The doumentation about using RMI with Bea is focused on running the RMI
server within Bea. This might be the "normal" thing to do, but in our
case Bea is the client, not the server. Do I still need to use
weblogic.rmi.*....? If so, where?
Grateful for any tip.
Göran Hagnell

Cant create JDBC Connections in RMI Server

I am having a pretty weird problem which I am struggling with for the last three days. In the main method of the Server object, following three things are supposed to happen:
1) Creation of a JDBC Connection
2) Creation of a Remote Object and then publishing the same to Registry.
3) Creation of another JDBC Connection (exactly same as in step1)
step 1 and 2 successfully executes and the third one always errors out. I just simply get a NullPointerException.
If I comment out step 2, step 3 executes successfully. Can someone please tell me the mystery? I need your response really urgently so please help me.
TIA
Code Snippet:
public static void main(String[] args) {
  System.setSecurityManager(new RMISecurityManager());
  try {
   Properties dbProps = new Properties();
   dbProps.put("user", "SDAWOODI");
   dbProps.put("password", "SDAWOODI");
   java.sql.Connection connection =    java.sql.DriverManager.getConnection("jdbc:oracle:thin:@wonder.cisco.com:1521:ODSDEV", dbProps);
  catch (Exception sqle) {
   System.out.println("[11111]"+sqle.toString());
  Properties props = new Properties();
  props.put("java.rmi.server.codebase", rmiCodeBase);
  System.setProperties(props);
  try {
   SchedulerRImpl schedulerR = new SchedulerRImpl(ssce_sch1);
   String nameStr = "s-sce-scheduler";
   try {
    Naming.bind(nameStr, schedulerR);
    if (Scheduler.m_debug_flag) System.out.println("[Scheduler.main] Scheduler bound with RMI registry!!!");
   catch (AlreadyBoundException abe) {
    if (Scheduler.m_debug_flag) System.out.println("[Scheduler.main] Scheduler is already bound with RMI registry ... trying RE-bind ...");
    try {
     Naming.rebind(nameStr, schedulerR);
     if (Scheduler.m_debug_flag) System.out.println("[Scheduler.main] Scheduler RE-bound with RMI registry!!!");
    catch (Exception e) {
     if (Scheduler.m_debug_flag) System.out.println("[Scheduler.main] Rcheduler RE-binding failed :(((");
  catch (Exception e) {
   if (Scheduler.m_debug_flag) System.out.println("[Scheduler.main] SchedulerR instantiation failed:((( : "+e.toString());
  Properties dbProps2 = new Properties();
  dbProps2.put("user", "SDAWOODI");
  dbProps2.put("password", "SDAWOODI");
  try {
   java.sql.Connection connection2 = java.sql.DriverManager.getConnection("jdbc:oracle:thin:@wonder.cisco.com:1521:ODSDEV", dbProps2);
   if (connection2==null) {
   System.out.println("connection is NULL");
  else {
   System.out.println("connection is NOT null");
catch (Exception sqle2) {
  System.out.println("[22222]"+sqle2.toString());
}

In reply to reply #4:
You can also quote the other part of my reply when it comes to snippets. There are so many pieces of code missing from your snippet that I simply cannot guess what is wrong. (Please do not put your entire class structures here.)
We get connections in many different classes at many different times. It is after all an application that does user work and the user work involves database accesses. Some of those accesses are before RMI (to establish repositories, etc). Most are after.
This URL (jdbc:oracle:thin:@wonder.cisco.com:1521:ODSDEV) appears to use a network connection (yes?). Is the 1521 a port? Are you trying to reuse this port? (the first conn uses the same URL). What port does RMI use?
There is nothing in your snippet that stands out obviously as "this is wrong".
RMI uses networking. JDBC uses networking.
Try substituting some other networking code in place of the RMI code and see if you still get a null trying the second connection. As you say, if you leave out the RMI code the second get.conn works.
Try leaving out the first get.conn. Do the RMI and second get.conn.
Try this and try that and try some more. I once had this problem with a network printer that would not print. The code was fine. The URL was fine. The response from the network and printer were both fine. The damn thing just wasn't printing. Turns out there was this bit, yes a single bit, in one word of a property called the "start print bit". If this bit wasn't on, nothing happened. I tried every combination until I finally found it.
I wish you the best.

Replication on rmi server

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