Intermittent stacktrace when starting and exiting Roo

Occasionally, Roo will display a stacktrace upon startup. A stacktrace on shutdown will appear also if the startup issue appears.
The problem is always connected with the SerializableMetadataProviderImpl (ie have not seen this problem with any other metadata provider or class)

Startup:

[email protected]:~/projects/roo-test/petclinic_orig$ roo.sh
16/08/2010 11:37:38 AM org.springframework.roo.felix.JdkDelegatingLogListener logNow
SEVERE: [org.springframework.roo.addon.serializable [35]] [org.springframework.roo.addon.serializable.SerializableMetadataProviderImpl] Cannot create component instance due to failure to bind reference metadataService
16/08/2010 11:37:38 AM org.springframework.roo.felix.JdkDelegatingLogListener logNow
SEVERE: [org.springframework.roo.addon.serializable [35]] FrameworkEvent ERROR
org.apache.felix.log.LogException: org.osgi.framework.ServiceException: Service factory returned null.
at org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:338)
at org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:220)
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:322)
at org.apache.felix.framework.Felix.getService(Felix.java:2913)
at org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:330)
at org.apache.felix.scr.impl.manager.DependencyManager.getService(DependencyManager.java:761)
at org.apache.felix.scr.impl.manager.DependencyManager$1.getInstance(DependencyManager.java:1003)
at org.apache.felix.scr.impl.helper.BindMethod.getParameters(BindMethod.java:436)
at org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:212)
at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:38)
at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:542)
at org.apache.felix.scr.impl.helper.BaseMethod$NotResolved.invoke(BaseMethod.java:500)
at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:434)
at org.apache.felix.scr.impl.manager.DependencyManager.invokeBindMethod(DependencyManager.java:991)
at org.apache.felix.scr.impl.manager.DependencyManager.bind(DependencyManage
at org.apache.felix.scr.impl.manager.DependencyManager.open(DependencyManager.java:831)
at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createImplementationObject(ImmediateComponentManager.java:200)
at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createComponent(ImmediateComponentManager.java:118)
at org.apache.felix.scr.impl.manager.DelayedComponentManager.createRealComponent(DelayedComponentManager.java:91)
at org.apache.felix.scr.impl.manager.AbstractComponentManager$Registered.getService(AbstractComponentManager.java:1139)
at org.apache.felix.scr.impl.manager.DelayedComponentManager.getService(DelayedComponentManager.java:85)
at org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:306)
at org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:220)
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:322)
at org.apache.felix.framework.Felix.getService(Felix.java:2913)
at org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:330)
at org.apache.felix.scr.impl.manager.DependencyManager.getService(DependencyManager.java:761)
at org.apache.felix.scr.impl.manager.DependencyManager$1.getInstance(DependencyManager.java:1003)
at org.apache.felix.scr.impl.helper.BindMethod.getParameters(BindMethod.java:436)
at org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:212)
at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:38)
at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:542)
at org.apache.felix.scr.impl.helper.BaseMethod$NotResolved.invoke(BaseMethod.java:500)
at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:434)
at org.apache.felix.scr.impl.manager.DependencyManager.invokeBindMethod(DependencyManager.java:991)
at org.apache.felix.scr.impl.manager.DependencyManager.bind(DependencyManager.java:907)
at org.apache.felix.scr.impl.manager.DependencyManager.open(DependencyManager.java:831)
at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createImplementationObject(ImmediateComponentManager.java:200)
at org.apache.felix.scr.impl.manager.ImmediateComponentManager.createComponent(ImmediateComponentManager.java:118)
at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:991)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:298)
at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.doRun(AbstractComponentManager.java:505)
at org.apache.felix.scr.impl.ComponentActivatorTask.run(ComponentActivatorTask.java:67)
at org.apache.felix.scr.impl.ComponentActorThread.run(ComponentActorThread.java:96)
at java.lang.Thread.run(Thread.java:619)

Shutdown:
roo> q
[Thread-3] [org.springframework.roo.addon.serializable [35]]
FrameworkEvent ERROR
org.apache.felix.log.LogException:
org.osgi.framework.ServiceException: Service factory returned null.
at
org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:338)
at
org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:220)
at
org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:322)
at
org.apache.felix.framework.Felix.getService(Felix.java:2913)
at
org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:330)
at
org.apache.felix.scr.impl.manager.DependencyManager.getService(DependencyManager.java:761)
at
org.apache.felix.scr.impl.manager.DependencyManager$3.getInstance(DependencyManager.java:1105)
at
org.apache.felix.scr.impl.helper.BindMethod.getParameters(BindMethod.java:436)
at
org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:212)
at
org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:38)
at
org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:542)
at
org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:434)
at
org.apache.felix.scr.impl.manager.DependencyManager.invokeUnbindMethod(DependencyManager.java:1094)
at
org.apache.felix.scr.impl.manager.DependencyManager.serviceRemoved(DependencyManager.java:400)
at
org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:251)
at
org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:864)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:732)
at
org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:662)
at
org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:3619)
at
org.apache.felix.framework.Felix.access$000(Felix.java:39)
at
org.apache.felix.framework.Felix$2.serviceChanged(Felix.java:667)
at
org.apache.felix.framework.ServiceRegistry.unregisterService(ServiceRegistry.java:124)
at
org.apache.felix.framework.ServiceRegistrationImpl.unregister(ServiceRegistrationImpl.java:129)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.unregisterComponentService(AbstractComponentManager.java:429)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$Satisfied.deactivate(AbstractComponentManager.java:1065)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.deactivateInternal(AbstractComponentManager.java:303)
at
org.apache.felix.scr.impl.manager.DependencyManager.serviceRemoved(DependencyManager.java:343)
at
org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:251)
at
org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:864)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:732)
at
org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:662)
at
org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:3619)
at
org.apache.felix.framework.Felix.access$000(Felix.java:39)
at
org.apache.felix.framework.Felix$2.serviceChanged(Felix.java:667)
at
org.apache.felix.framework.ServiceRegistry.unregisterService(ServiceRegistry.java:124)
at
org.apache.felix.framework.ServiceRegistrationImpl.unregister(ServiceRegistrationImpl.java:129)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.unregisterComponentService(AbstractComponentManager.java:429)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$Satisfied.deactivate(AbstractComponentManager.java:1065)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.disposeInternal(AbstractComponentManager.java:322)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.dispose(AbstractComponentManager.java:185)
at
org.apache.felix.scr.impl.config.ConfiguredComponentHolder.disposeComponents(ConfiguredComponentHolder.java:275)
at
org.apache.felix.scr.impl.BundleComponentActivator.dispose(BundleComponentActivator.java:319)
at
org.apache.felix.scr.impl.Activator.disposeComponents(Activator.java:277)
at
org.apache.felix.scr.impl.Activator.bundleChanged(Activator.java:178)
at
org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:800)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:728)
at
org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:610)
at
org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:3608)
at
org.apache.felix.framework.Felix.stopBundle(Felix.java:2114)
at
org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1148)
at
org.apache.felix.framework.StartLevelImpl.run(StartLevelImpl.java:264)
at java.lang.Thread.run(Thread.java:619)