java.io.InvalidClassException

Hello friends,

I have 3 applications: 1 publisher (let's call it 'A') and 2 clients
(B and C).

So, I run A and it publishes an EnglishSpeaker service in reggie.

Then I run B and it tries to get the EnglishSpeaker proxy, but it
gets an InvalidClassExpcetion [1]. Well, AFAIK, the most common
reason is that the class version used to instantiate the service
published is not the same class version available to reggie, right?

But then, if I run C, it discovers the EnglishSpeaker service and it
gets its proxy successfuly.

The problem occurs only in B app. Can you help me, please?


[1]
2006 5:41:27 PM com.sun.jini.reggie.RegistrarProxy handleException
INFO: unmarshalling failure
java.io.InvalidClassException:
br.unb.cic.ubiquitos.provider.speaker.EnglishSpeaker; class invalid
for deserialization
         at java.io.ObjectStreamClass.initNonProxy
(ObjectStreamClass.java:544)
         at java.io.ObjectInputStream.readNonProxyDesc
(ObjectInputStream.java:1546)
         at java.io.ObjectInputStream.readClassDesc
(ObjectInputStream.java:1460)
         at java.io.ObjectInputStream.readOrdinaryObject
(ObjectInputStream.java:1693)
         at java.io.ObjectInputStream.readObject0
(ObjectInputStream.java:1299)
         at java.io.ObjectInputStream.readObject
(ObjectInputStream.java:339)
         at net.jini.io.MarshalledInstance.get
(MarshalledInstance.java:358)
         at net.jini.io.MarshalledInstance.get
(MarshalledInstance.java:287)
         at com.sun.jini.proxy.MarshalledWrapper.get
(MarshalledWrapper.java:127)
         at com.sun.jini.reggie.Item.get(Item.java:141)
         at com.sun.jini.reggie.Item.toServiceItem(Item.java:177)
         at com.sun.jini.reggie.Matches.get(Matches.java:62)
         at com.sun.jini.reggie.RegistrarProxy.lookup
(RegistrarProxy.java:128)
         at br.unb.cic.jini.EasyJini.findServices(EasyJini.java:316)
         at
br.unb.cic.ubiquitos.servicemanager.ServiceManager.getServiceProviders
(ServiceManager.java:120)
         at
br.unb.cic.ubiquitos.adaptabilityengine.AdaptabilityEngine.handleService
ProviderRequest(AdaptabilityEngine.java:66)
         at
br.unb.cic.ubiquitos.connectionmanager.BluetoothConnectionManager.handle
UbiquitOSSmartSpaceConnection(BluetoothConnectionManager.java:113)
         at
br.unb.cic.ubiquitos.connectionmanager.BluetoothConnectionManager.access
$000(BluetoothConnectionManager.java:28)
         at
br.unb.cic.ubiquitos.connectionmanager.BluetoothConnectionManager$1
$1.connectionEstablished(BluetoothConnectionManager.java:80)
         at br.unb.cic.bluetooth.BtUtil$1.run(BtUtil.java:717)



Thanks a lot,
Alexandre

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