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> org.hibernate.impl.SessionFactoryObjectFactory.getNamedInstance(SessionFactoryObjectFactory.java:159) > ~[hibernate-core-3.6.9.Final.jar:3.6.9.Final] > at > org.hibernate.impl.SessionFactoryImpl.readResolve(SessionFactoryImpl.java:753) > ~[hibernate-core-3.6.9.Final.jar:3.6.9.Final] > at
java.lang.NullPointerException: null
> at java.util.concurrent.ConcurrentHashMap.hash(ConcurrentHashMap.java:333) 
> ~[na:1.7.0_25]
> at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:988) 
> ~[na:1.7.0_25]
> at 
> org.hibernate.impl.SessionFactoryObjectFactory.getNamedInstance(SessionFactoryObjectFactory.java:159) 
> ~[hibernate-core-3.6.9.Final.jar:3.6.9.Final]
> at 
> org.hibernate.impl.SessionFactoryImpl.readResolve(SessionFactoryImpl.java:753) 
> ~[hibernate-core-3.6.9.Final.jar:3.6.9.Final]
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
> ~[na:1.7.0_25]
> at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
> ~[na:1.7.0_25]
> at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
> ~[na:1.7.0_25]
> at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_25]
> at 
> java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1104) 
> ~[na:1.7.0_25]
> at 
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1805) 
> ~[na:1.7.0_25]
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1348) 	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1913)