java.lang.NullPointerException
	at org.eclipse.emf.spi.cdo.AbstractChangeSetsConflictResolver$RemoteInvalidationEventQueue.handleEvent(AbstractChangeSetsConflictResolver.java:273)
	at org.eclipse.emf.spi.cdo.CDOSessionInvalidationEventQueue$1.notifyEvent(CDOSessionInvalidationEventQueue.java:48)
	at org.eclipse.net4j.util.event.Notifier.fireEventSafe(Notifier.java:172)
	at org.eclipse.net4j.util.event.Notifier.fireEvent(Notifier.java:118)
	at org.eclipse.net4j.util.event.Notifier.fireEvent(Notifier.java:93)
	at org.eclipse.net4j.util.container.Container.fireEvent(Container.java:63)
	at org.eclipse.emf.internal.cdo.session.CDOSessionImpl$SessionInvalidation.lambda$0(CDOSessionImpl.java:2129)
	at org.eclipse.emf.internal.cdo.session.CDOSessionImpl$SessionInvalidation$$Lambda$30.0000000000000000.run(Unknown Source)
	at org.eclipse.emf.internal.cdo.session.CDOSessionImpl$SessionInvalidator.scheduleInvalidations(CDOSessionImpl.java:2031)
	at org.eclipse.emf.internal.cdo.session.CDOSessionImpl.invalidate(CDOSessionImpl.java:1200)
	at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl$CDOCommitContextImpl.postCommit(CDOTransactionImpl.java:4800)
	at org.eclipse.emf.internal.cdo.transaction.CDOSingleTransactionStrategyImpl.commit(CDOSingleTransactionStrategyImpl.java:66)
	<<<transaction.commit()>>>