@Entity
	private static class Company implements Serializable {
		@Id @GeneratedValue
		public long id;
		
		@OneToMany
		public Set<Employee> employees;
	}
	
	@Entity
	@Inheritance( strategy = InheritanceType.TABLE_PER_CLASS )
	private static class Employee {
		@Id @GeneratedValue
		public long id;
		
		@ManyToMany
		public Set<Manager> managers;
	}
	
	@Entity
	private static class Manager extends Employee {
	}

		Subgraph<Employee> subgraph1 = entityGraph.addSubgraph( "employees" );
		subgraph1.addAttributeNodes( "managers" );
		Subgraph<Employee> subgraph2 = subgraph1.addSubgraph( "managers" );
		subgraph2.addAttributeNodes( "managers" );

java.lang.IllegalArgumentException: Unable to locate Attribute  with the the given name [managers] on this ManagedType [org.hibernate.jpa.test.graphs.queryhint.QueryHintEntityGraphTest$Manager]
	at org.hibernate.jpa.internal.metamodel.AbstractManagedType.checkNotNull(AbstractManagedType.java:144)
	at org.hibernate.jpa.internal.metamodel.AbstractManagedType.getDeclaredAttribute(AbstractManagedType.java:137)
	at org.hibernate.jpa.graph.internal.SubgraphImpl.resolveAttribute(SubgraphImpl.java:124)
	at org.hibernate.jpa.graph.internal.AbstractGraphNode.buildAttributeNode(AbstractGraphNode.java:119)
	at org.hibernate.jpa.graph.internal.AbstractGraphNode.addAttribute(AbstractGraphNode.java:114)
	at org.hibernate.jpa.graph.internal.AbstractGraphNode.addAttributeNodes(AbstractGraphNode.java:109)
	at org.hibernate.jpa.graph.internal.SubgraphImpl.addAttributeNodes(SubgraphImpl.java:62)
	at org.hibernate.jpa.test.graphs.queryhint.QueryHintEntityGraphTest.testQueryHintEntityGraph(QueryHintEntityGraphTest.java:81)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:63)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)