You really should not be using RMI for any application you build today, basically for the reasons you just laid out. In some cases (diving into legacy or “enterprise” applications) you just have no choice. However, if you are starting a new project, other options are: REST + JSON over HTTP The de-facto standard for … Read more
It’s because, List returned by subList() method is an instance of ‘RandomAccessSubList’ which is not serializable. Therefore you need to create a new ArrayList object from the list returned by the subList(). List<String> list = new ArrayList<String>(originalList.subList(0, 10));
Remote class loading can be tricky. The original post doesn’t include any information about the code base. It may be that the client’s security configuration is correct, but it has no access to the remote code. The classes are loaded directly from the “code base” by the client. They are not presented to the client … Read more
Just to be sure, the Class in both VMs are sharing same compiled version of the classes? Could you try re-compiling and adding same jar to both VMs. I hope that is already taken care.
You already know about method calls. What if the object that you want to invoke the method on is on a different computer? You use RMI to send the call from one computer (client) to the other (server). The client will wait (or “block”) until the result comes back from the server. This is called … Read more
We use something like the following to programatically connect to our JMX servers. You should run your server with something like the following arguments: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.port=1234 -Dcom.sun.management.jmxremote.ssl=false To bind to a particular address you’ll need to add the following VM arguments: -Djava.rmi.server.hostname=A.B.C.D Then you can connect to your server using JMX client code like … Read more
The web services do allow a loosely coupled architecture. With RMI, you have to make sure that the class definitions stay in sync in all application instances, which means that you always have to deploy all of them at the same time even if only one of them is changed (not necessarily, but it is … Read more
All of the methods on a RMI Remote interface must declare RemoteException in their throws clause, e.g.: public String getId() throws RemoteException; It’s not clear why the exception names getId() specifically, it’s probably just the first method it checked. Also, the getLeafNodes() and getNeighborhoodList() methods should have return types that specify Node, not NodeImpl, otherwise … Read more
Essentially the RMI registry is a place for the server to register services it offers and a place for clients to query for those services. See Introduction to Java RMI. Excerpt: Figure 1 shows the connections made by the client when using RMI. Firstly, the client must contact an RMI registry, and request the name … Read more
This is item A.1 in the RMI FAQ. You need to either fix your /etc/hosts file or set the java.rmi.server.hostname property at the server.