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java.lang.NullPointerException at org.hibernate.engine.internal.StatefulPersistenceContext.clear(StatefulPersistenceContext.java:237)[hibernate-core-4.3.8.Final.jar:4.3.8.Final] at org.hibernate.internal.SessionImpl.internalClear(SessionImpl.java:340)[hibernate-core-4.3.8.Final.jar:4.3.8.Final] at org.hibernate.internal.SessionImpl.clear(SessionImpl.java:336)[hibernate-core-4.3.8.Final.jar:4.3.8.Final] at org.hibernate.jpa.spi.AbstractEntityManagerImpl.clear(AbstractEntityManagerImpl.java:1419)[hibernate-entitymanager-4.3.8.Final.jar:4.3.8.Final] at sun.reflect.GeneratedMethodAccessor178.invoke(Unknown Source)[?:?] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[?:1.8.0_60] at java.lang.reflect.Method.invoke(Method.java:497)[?:1.8.0_60] at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:344)[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE] at com.sun.proxy.$Proxy79.clear(Unknown Source)[?:?]