Caused by: org.hibernate.MappingException: Could not instantiate persister org.hibernate.persister.entity.UnionSubclassEntityPersister
	at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:112) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:77) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.metamodel.internal.MetamodelImpl.initialize(MetamodelImpl.java:129) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:300) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:462) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:710) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:726) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.springframework.orm.hibernate5.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:535) ~[spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
	at org.springframework.orm.hibernate5.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:519) ~[spring-orm-5.0.4.RELEASE.jar:5.0.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1769) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1706) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
	... 119 common frames omitted
Caused by: java.lang.NullPointerException: null
	at org.hibernate.persister.entity.AbstractPropertyMapping.getCommonPersistentClass(AbstractPropertyMapping.java:272) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.entity.AbstractPropertyMapping.getCommonType(AbstractPropertyMapping.java:247) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.entity.AbstractPropertyMapping.addPropertyPath(AbstractPropertyMapping.java:208) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.entity.AbstractPropertyMapping.initPropertyPaths(AbstractPropertyMapping.java:330) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.entity.AbstractEntityPersister.initOrdinaryPropertyPaths(AbstractEntityPersister.java:2314) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.entity.AbstractEntityPersister.initPropertyPaths(AbstractEntityPersister.java:2361) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.entity.AbstractEntityPersister.postConstruct(AbstractEntityPersister.java:3940) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at org.hibernate.persister.entity.UnionSubclassEntityPersister.<init>(UnionSubclassEntityPersister.java:213) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_102]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_102]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_102]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_102]
	at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:96) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
	... 129 common frames omitted