org.hibernate.AssertionFailure: null identifier
	at org.hibernate.engine.spi.EntityKey.<init>(EntityKey.java:69)
	at org.hibernate.internal.AbstractSessionImpl.generateEntityKey(AbstractSessionImpl.java:247)
	at org.hibernate.loader.Loader.extractKeysFromResultSet(Loader.java:794)
	at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:707)
	at org.hibernate.loader.Loader.processResultSet(Loader.java:940)
	at org.hibernate.loader.Loader.doQuery(Loader.java:910)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:341)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:311)
	at org.hibernate.loader.Loader.loadEntity(Loader.java:2111)
	at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82)
	at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72)
	at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3887)
	at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:458)
	at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:427)
	at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:204)
	at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:260)
	at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148)
	at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1078)
	at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1005)
	at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:651)
	at org.hibernate.type.EntityType.resolve(EntityType.java:471)
	at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:168)
	at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:134)
	at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1103)
	at org.hibernate.loader.Loader.processResultSet(Loader.java:960)
	at org.hibernate.loader.Loader.doQuery(Loader.java:910)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:341)
	at org.hibernate.loader.Loader.doList(Loader.java:2516)
	at org.hibernate.loader.Loader.doList(Loader.java:2502)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2332)
	at org.hibernate.loader.Loader.list(Loader.java:2327)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:490)
	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355)
	at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)
	at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1247)
	at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
	at domain.BugTest.shouldSelectAServer(BugTest.java:17)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)