problem with eventlistener triggered by scheduler

hi,

I wrote an eventlistener which query repository using 
CoreSession.queryIt(). It works fine when it's triggered by an event 
like 'documentRemoved', 'documentCreated', ... but it gets exception on 
querIt() when it's triggered by an event sent by a scheduler. Here is 
the backtrace :

2007-05-28 15:04:00,031 DEBUG 
[be.microresearch.ecm.docexpiration.listener.DocTypeExpirationListener] 
<checkDocType> SELECT * FROM DossierClient WHERE 
(ecm:currentLifecycleState='lead' )

2007-05-28 15:04:00,031 DEBUG 
[org.nuxeo.ecm.core.api.ejb.DocumentManagerBean] Initializing session 
for repository: demo

2007-05-28 15:04:00,031 DEBUG 
[org.nuxeo.ecm.core.repository.jcr.JCRRepository] Pooling session: 
-3258017742405500683

2007-05-28 15:04:00,046 ERROR [STDERR] 
java.lang.reflect.UndeclaredThrowableException

2007-05-28 15:04:00,046 ERROR [STDERR]  at $Proxy155.queryIt(Unknown Source)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
be.microresearch.ecm.docexpiration.listener.DocTypeExpirationListener.checkDocType(DocTypeExpirationListener.java:222)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
be.microresearch.ecm.docexpiration.listener.DocTypeExpirationListener.notifyEvent(DocTypeExpirationListener.java:105)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.nuxeo.ecm.core.listener.impl.CoreEventListenerServiceImpl.notifyCompatibleEvent(CoreEventListenerServiceImpl.java:89)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.nuxeo.ecm.core.listener.impl.CoreEventListenerServiceImpl.notifyEventListeners(CoreEventListenerServiceImpl.java:202)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.nuxeo.ecm.platform.scheduler.core.EventJob.execute(EventJob.java:68)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.quartz.core.JobRunShell.run(JobRunShell.java:203)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)

2007-05-28 15:04:00,046 ERROR [STDERR] Caused by: java.io.IOException: 
No ClassLoaders found for: 
org.nuxeo.ecm.core.api.impl.DocumentModelIteratorImpl

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.serial.classmetamodel.ClassMetamodelFactory.getClassMetaData(ClassMetamodelFactory.java:317)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.serial.classmetamodel.StreamingClass.readStream(StreamingClass.java:72)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectDescriptionFromStreaming(ObjectDescriptorFactory.java:380)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromDescription(ObjectDescriptorFactory.java:81)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.serial.objectmetamodel.DataContainer$DataContainerInput.readObject(DataContainer.java:841)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.serial.io.MarshalledObjectForLocalCalls.get(MarshalledObjectForLocalCalls.java:60)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:74)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.ejb3.stateful.StatefulRemoteProxy.invoke(StatefulRemoteProxy.java:133)

2007-05-28 15:04:00,046 ERROR [STDERR]  ... 8 more

2007-05-28 15:04:00,046 ERROR [STDERR] Caused by: 
java.lang.ClassNotFoundException: No ClassLoaders found for: 
org.nuxeo.ecm.core.api.impl.DocumentModelIteratorImpl

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:212)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:511)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:405)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
java.lang.ClassLoader.loadClass(ClassLoader.java:251)

2007-05-28 15:04:00,046 ERROR [STDERR] 	at 
org.jboss.serial.classmetamodel.ClassMetamodelFactory.getClassMetaData(ClassMetamodelFactory.java:273)

2007-05-28 15:04:00,046 ERROR [STDERR]  ... 16 more

2007-05-28 15:04:00,046 DEBUG 
[org.nuxeo.ecm.core.repository.jcr.JCRSession] dispose 
session-3258017742405500683

2007-05-28 15:04:00,046 DEBUG 
[org.nuxeo.ecm.core.repository.jcr.JCRRepository] Removing pooled 
session: -3258017742405500683

2007-05-28 15:04:00,062 DEBUG 
[org.nuxeo.ecm.core.listener.impl.NXRuntimeEventListener] notifyEvent

2007-05-28 15:04:00,062 DEBUG 
[org.nuxeo.ecm.platform.events.listener.JMSEventListener] notifyEvent

2007-05-28 15:04:07,406 DEBUG 
[org.compass.core.lucene.engine.optimizer.ScheduledLuceneSearchEngineOptimizer] 
Checking for index optimization