[TM4J-users] more on AssociationRole in hibernate / MySQL

[George T. <geo...@fr...>]

Hello again,

(I am attaching this as a plain text also, for easier reading)

I have a problem with Associations and after some days of confusion I found
out that:

In my hibernate/MySQL server (I have a client server application using RMI)

The server is trying to delete an AssociationRole, because of a clients RMI
call

here is my code (in the server):

Association a = m_associationRole.getAssociation ();
m_associationRole.remove ();
System.out.println ("comes up to this point");
Set<AssociationRole> set = a.getAssociationRoles ();
System.out.println ("never comes here!");
This generaly should work OK but:

If for some reason a previous (different) RMI call from the client (or
another client), used this specific Association that holds the
AssociationRole

As a result, I have the following Exception:


comes up to this point

org.tm4j.topicmap.ProviderTransactionException: Error updating data object.

Cause: net.sf.hibernate.ObjectNotFoundException: The object with that id was
deleted: 4028802.....bbb600002, of class:
org.tm4j.topicmap.hibernate.MemberDataObject

Cause:The object with that id was deleted: 4028802.....bbb600002, of class:
org.tm4j.topicmap.hibernate.MemberDataObject

at org.tm4j.topicpam.hibernate.HibernateProviderTransaction.load(Unknown
Source)

at org.tm4j.topicmap.hibernate.PersistenceWrapper.load(Unknown Source)

at org.tm4j.topicmap.hibernate.PersistenceWrapper.load(Unknown Source)

at org.tm4j.topicmap.hibernate.MemberImpl.getPlayers(Unknown Source)

at org.tm4j.topicmap.hibernate.MemberImpl.getPlayers(Unknown Source)

at
org.tm4j.tmapi.core.TMAPIAssociationImpl.getAssociationRoles(TMAPIAssociatio
nImpl.java:79)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unkown Source)

at sun.rmi.server.UnicastServerRef.dispatch(Unkown Source)

at sun.rmi.transport.Transport$1.run(Unkown Source)

at java.security.AccessController.doPrivileged(Native Method)

at sun.rmi.transport.Transport.serviceCall(Unkown Source)

at sun.rmi.transport.tcp.TCPTransport.handleMessage(Unkown Source)

at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unkown Source)

at java.lang.Thread.run(Unkown Source)

caused by: net.sf.hibernate.ObjectNotFoundException: The object with that id
was deleted: 4028802.....bbb600002, of class:
org.tm4j.topicmap.hibernate.MemberDataObject

at net.sf.hibernate.impl.SessionImpl.doLoad(SessionImpl.java:2060)

at net.sf.hibernate.impl.SessionImpl.doLoadByClass(SessionImpl.java:1955)

at net.sf.hibernate.impl.SessionImpl.load(SessionImpl.java:1884)

... 18 more





I close and restart the client, I try to access the AssociationRoles and I
get:


java.rmi.UnmarshalException: Error unmarshaling return; nested exception is:

java.lang.ClassNotFoundException:
org.tm4j.topicmap.ProviderTransactionException

at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:217)

at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:126)

at etm.server.rmi.tmapi.EtmAssociationImp_Stub.getAssociationRoles(Unknown
Source)

at
etm.client.tmapi.AssociationImp.getAssociationRoles(AssociationImp.java:70)

at yellow.ui.graph.PanGraph.expandAssociation(PanGraph.java:629)

at
yellow.actions.node.ExpandTopicRolesAction$1TThread.run(ExpandTopicRolesActi
on.java:104)

Caused by: java.lang.ClassNotFoundException:
org.tm4j.topicmap.ProviderTransactionException

at java.net.URLClassLoader$1.run(URLClassLoader.java:200)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at java.lang.ClassLoader.loadClass(ClassLoader.java:251)

at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:242)

at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:430)

at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)

at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:620)

at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:247)

at
sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:197)

at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1538)

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 sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:215)

... 5 more



I need to restart the server in order for the Association to work OK.

(I have no similar problems with Topics, or deleting the full Association,
or Occurrences)

I am not a hibernate expert and I don't know if someone that knows hibernate
could have any ideas on this
It seems to me there is a problem with sessions or something like this

any ideas?
Cheers
George




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