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jakaplan / matlabcontrol

matlabcontrol is a Java API that allows for calling MATLAB from Java. You can eval, feval, as well as get and set variables. Interaction can be performed from either inside MATLAB or outside MATLAB.
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Matlab session cannot be registered #12

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago 
What version of matlabcontrol are you using?
4.0.0

What version of MATLAB are you using?
R2012a

What operating system are you using?
Windows 7

Are you using matlabcontrol from inside MATLAB or outside MATLAB?
Outside MATLAB.  Specifically, from a custom-written Java plugin in the 
Java-based microscopy software MicroManager.

What steps will reproduce the problem?
1. Creating a MatlabProxyFactoryOptions instance.

What did you expect to happen? What happened instead?
I expected Matlab would open, create an instance, and then I would later be 
able to connect to that instance.  When I create an instance, I get the error 
message below in Matlab.  Commands sent through the proxy will execute, but I 
cannot reconnect to the session.

Errors:
Reconnecting to this session of MATLAB will not be possible
matlabcontrol.MatlabConnectionException: Could not register this session of 
MATLAB
    at matlabcontrol.MatlabBroadcaster.bindSession(MatlabBroadcaster.java:144)
    at matlabcontrol.MatlabBroadcaster.broadcast(MatlabBroadcaster.java:92)
    at matlabcontrol.MatlabConnector$EstablishConnectionRunnable.run(MatlabConnector.java:189)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.rmi.ServerException: RemoteException occurred in server thread; 
nested exception is: 
    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: matlabcontrol.MatlabSession (no security manager: RMI class loader disabled)
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:400)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:248)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$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:662)
    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.bind(Unknown Source)
    at matlabcontrol.MatlabBroadcaster.bindSession(MatlabBroadcaster.java:140)
    ... 8 more
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested 
exception is: 
    java.lang.ClassNotFoundException: matlabcontrol.MatlabSession (no security manager: RMI class loader disabled)
    at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:390)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:248)
    at sun.rmi.transport.Transport$1.run(Transport.java:159)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
    at sun.rmi.transport.tcp.TCPTransport$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:662)
Caused by: java.lang.ClassNotFoundException: matlabcontrol.MatlabSession (no 
security manager: RMI class loader disabled)
    at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:533)
    at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:628)
    at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:294)
    at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:238)
    at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1530)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1492)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1731)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    ... 12 more

Original issue reported on code.google.com by asgro%pr...@gtempaccount.com on 20 Feb 2013 at 2:15

GoogleCodeExporter commented 8 years ago 
Based on communication with bug opener the issue here is stemming from 
MicroManager interfering with Java RMI - this even occurs if MicroManger is 
running and the demo is used.

Original comment by nonot...@gmail.com on 21 Feb 2013 at 2:37

GoogleCodeExporter commented 8 years ago 
Hello,
I have exactly the same problem. But I don't have MicroManager.
How do I know which program is interfering with the connection?
Thank you.

Original comment by apasq...@gmail.com on 9 Sep 2013 at 1:48

GoogleCodeExporter commented 8 years ago 
i have exactly the same problem. But! If i started from Swing application its 
work, if i start from ant task it doesnt work !

Original comment by Aleksej.Turko@googlemail.com on 15 Jan 2015 at 10:19

GoogleCodeExporter commented 8 years ago 
This works for me, maybe it helps, if still have problems.  

public MatlabCommand() throws Exception {
  // Change classloader for usage in OSGi threads
  ClassLoader OldClassLoader = Thread.currentThread().getContextClassLoader();
  Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
  this.Matlabfactory = new MatlabProxyFactory();
  this.MatlabProxy = Matlabfactory.getProxy();
  // Reset classloader
  Thread.currentThread().setContextClassLoader(OldClassLoader);
}

Original comment by t.heitpl...@googlemail.com on 21 May 2015 at 9:42