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java.lang.NullPointerException at org.hibernate.tuple.entity.PojoEntityTuplizer.determineConcreteSubclassEntityName(PojoEntityTuplizer.java:333) at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassEntityPersister(AbstractEntityPersister.java:4581) at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1456) at org.hibernate.persister.entity.DiscriminatorType.nullSafeGet(DiscriminatorType.java:72) at org.hibernate.persister.entity.DiscriminatorType.nullSafeGet(DiscriminatorType.java:59) at org.hibernate.loader.hql.QueryLoader.getResultRow(QueryLoader.java:452) at org.hibernate.loader.hql.QueryLoader.getResultColumnOrRow(QueryLoader.java:435) at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:756) at org.hibernate.loader.Loader.processResultSet(Loader.java:972) at org.hibernate.loader.Loader.doQuery(Loader.java:930) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:336) at org.hibernate.loader.Loader.doList(Loader.java:2611) at org.hibernate.loader.Loader.doList(Loader.java:2594) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2423) at org.hibernate.loader.Loader.list(Loader.java:2418) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:501) at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:371) at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220) at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1268) at org.hibernate.internal.QueryImpl.list(QueryImpl.java:87) at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:567) at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:436) at com.geowarin.hibernate.jpa.standalone.App.tryFetch(App.java:40) at com.geowarin.hibernate.jpa.standalone.App.main(App.java:19)