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michael modenese

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since Mar 22, 2006
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Recent posts by michael modenese

Thank you very much for your reply !!

It works exactly the way I needed to have it ! Since you mentioned the Firewall-Issue:

As said, to preset the "ServicePort" for ActiveMQ:

<managementContext createConnector="true" connectorPort="10120" rmiServerPort="10135" jmxDomainName="my-broker" connectorPath="/jmxrmiaq" />

Where 10120 is the Registry port and 10135 the ServicePort where the socketcommunication happens.

To do the same in Java-Code, the url-String for the JMXServiceURL needs to be something rather cryptic:

String url = "service:jmx:rmi://localhost:10136/jndi/rmi://localhost:10120/jmxapp1";
// original String without fixed ServicePort: String url = "service:jmx:rmi:///jndi/rmi://localhost:10120/jmxapp1";
JMXServiceURL serviceURL = new JMXServiceURL(url);
JMXConnectorServer server = JMXConnectorServerFactory.newJMXConnectorServer(serviceURL, null, mbs);
System.out.println("\nStarting monitored app @ " + url);


12 years ago
I am trying to manage multiple Java processes on serverside with JMX. I have AcitveMQ setup and I can specify in the activemq.xml config file:
<managementContext connectorPort="10120" rmiServerPort="10135" jmxDomainName="my-broker" connectorPath="/jmxrmione" />
so the registry ist startet at port 10120 and the serviceport is 10135. the "stub" ist exportet with the name jmxrmione. I can connect tot it with JConsole using:


Now I have a Java-Serverprocess and i really like to have it also manageable on Port 10120. So i could connect to it with the JConsole using the fill connection:


Now the questions are:

How can I specify the Name of the "Stub" for a Java-Process ? Default seems always to be rmijmx.
How can I set the ServicePort for JMX for that Java-Process ? The Registryport can be set with the property

I could live with if I have to use a different registry for every JVM just for the sake of JMX, (although it seems very strange since I would use different names for the exportet stub) but the arbirtary Port is really a pain.

Thank you for kind reply

Michael Modenese

12 years ago
Hello Chinna

thank you for your reply.
I've tried your suggestions. Unfortunately with no success. Still got the
java.rmi.ConnectIOException: non-JRMP server at remote endpoint

May i point out that the same code, but WITHOUT SSL-Factories ist working fine (even with "rmi://"):

int PORT_BARE = 2029;
Registry registry = LocateRegistry.createRegistry(PORT_BARE);
HelloImpl objBARE = new HelloImpl(PORT_BARE);
// works fine:
Naming.rebind("rmi://localhost:" + PORT_BARE + "/" + "HelloServer", objBARE);
// registry.rebind("HelloServer", objBARE);

So i recon the point must be somehow in the SSLSocketFactories. But i cant figure out what the type of the SocketFactories has to do with the binding mechanism.

Any idea ?



14 years ago
i am trying this code:

int PORT_SSL = 2019;
Registry registrySSL = LocateRegistry.createRegistry(PORT_SSL, new SslRMIClientSocketFactory(), new SslRMIServerSocketFactory());
HelloImpl objSSL = new HelloImpl(PORT_SSL, new SslRMIClientSocketFactory(), new SslRMIServerSocketFactory());
// not null :
Registry temp = LocateRegistry.getRegistry(PORT_SSL);
// does not work: ???
Naming.rebind("rmi://localhost:" + PORT_SSL + "/" + "HelloServer", objSSL);
// does work !!!
registrySSL.rebind("HelloServer", objSSL);

and get the Exception:
java.rmi.ConnectIOException: non-JRMP server at remote endpoint
at sun.rmi.transport.tcp.TCPChannel.createConnection(
at sun.rmi.transport.tcp.TCPChannel.newConnection(
at sun.rmi.server.UnicastRef.newCall(
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(
at ServerStarter.main(

but isn't Naming.rebind() supposet to just delegate the call to Registry.rebind() ?
What am i missing ? What is the deal with SSLSocketFactories ?

Help appreciated


14 years ago
i have a swing-client that should be deployed using webstart both via webserver and filesystem.
when i put the jnlp file and the jars on a windows-server the application starts fine but i cant change it on the windows-server because it is locked which makes it pretty much usless in a CLient-Server context where there are usually updates concerning the client.
Now my question is: is it a generel problem ? is it because of the windows filesystem and is there a way around it ? or do i really need a webserver to make things work ?
also with the new 1.6.0_18 the "offline" problem should have been fixed. I did try, but nope. Starting from the flisystem my application refused to start offline if the original downloadlocation was not available. anyone else having the same problem ?

thank you for replies

14 years ago

i thought it is a bit complicated. but:
i got the uri/url of my images directory:


how exactly do i make a file object to be used via webstart ?

with new file(uri) not possible.

thank you for your reply


15 years ago
i am trying to load ALL icons i have in my jar file.
i start with:
Class clazz = Class.forName("");
String me = clazz.getName().replace(".", "/") + ".class";
dirURL = clazz.getClassLoader().getResource(me);
if (dirURL.getProtocol().equals("jar")) {
String jarPath = dirURL.getPath().substring(6, dirURL.getPath().indexOf("!")); //strip out only the JAR file

JarFile jar = new JarFile(jarPath );

Enumeration<JarEntry> entries = jar.entries(); //gives ALL entries in jar
while (entries.hasMoreElements()) {
JarEntry nextEntry = entries.nextElement();
String jarEntryName = nextEntry.getName();

this works fine while im am debugging from a local jws installation but fails when i start the software with realwebstart from a link.
the error seems to be that the JarFile jar cannot be found even though it has the proper jarPath. can anyone help ?
is there another way to load resources from a jar 8not single named resources, but kind of all *.jpg or similar)

thank you


15 years ago
I am doing a RMI Application where the server is behind a firewall. some clients are inside the firewall and some are outside. in order zu get the clients to work though the firewall my networkadministrator can open the ports i need. my problem is that i have to start the java application on serverside with the option "java -Djava.rmi.server.hostname=....." now the clients inside the firewall do not run anymore, but those outside the firewall run fine. any idea how i can fix this problem

thanks for help
17 years ago
Hi there,
i have a question concerning the jdk version i used to compile and jar my project. is there a way to find out from the jar file with what version the project has been compiled ? the "Created-By:" (example : Created-By: 1.5.0_09-b01 (Sun Microsystems Inc.)) from the manifest file in my jar is the version of my jar tool.

thanks, mike
17 years ago
hi there,
i have 2 java applications and one needs to check if the other is still running by setting a variable and wait, so in the meantime the other application can change the value of the same variable, so to prove that it is still running. each application has a thread doing this checking.
any idea what mechanism i can use for storing this variable ? is there something like a env.variable i can use ? ore properties stored outside the java applications ? i would prefer not to use a file....

18 years ago
...ok single sign on is what i thouth first., but i need to check whether an other java application is running or crashed.... something like a taskmanager monitor....
18 years ago
hi there. i have the following problem: i need my java application to check whether an other java application is allready running on my machine or not (...and then do a kind of autologin) is this possible ? on windows ? do i need some special dll's ?

18 years ago