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NPE at AbstractEntityTuplizer.createProxy(Abstract..)

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Saniya

Post subject: NPE at AbstractEntityTuplizer.createProxy(Abstract..)

Posted: Thu Feb 02, 2006 2:30 pm

Newbie

Joined: Tue Nov 22, 2005 11:28 am
Posts: 6

Hi I have some code that loads a "Person" object and calls a method getTrips() which returns a Set of trips. This code was working fine in a command line based app but in my webapp deployed on Sun Appserver i get an NPE. The stacktrace is included after the code.. I observed that the exception occurs when i call the getTrips() method on the Person object.. . can anyone give me some pointers on this.. maybe the mapping files have a bug? not sure....
Thanks
Saniya

Code:

Session session = travelcenterhibernate.HibernateUtil.getSessionFactory().getCurrentSession();
           session.beginTransaction();
           travelcenterhibernate.Person person = (travelcenterhibernate.Person)session.load(travelcenterhibernate.Person.class, personId);
           System.err.println("Person Information: "+ " Person Name "+ person.getName()+ " JobTitle: "+ person.getJobTitle() );
           System.err.println("Person Trips Information: Found ");
          
          java.util.Set personTrips = (org.hibernate.collection.PersistentSet)person.getTrips();
          System.out.println("Total Trips" + personTrips.size());
          Iterator iterator = personTrips.iterator();
          while(iterator.hasNext()){
              travelcenterhibernate.Trip temp = (Trip)iterator.next();
              System.err.println(" \n TripId: "+temp.getTripId()+ " DestCity: "+ temp.getDepCity()+ " TripType: "+temp.getTripType().getName());
          }

=====================================
stacktrace from the exception...

java.lang.NullPointerException
at org.hibernate.tuple.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:372)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:3120)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:232)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:173)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:812)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:782)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:266)
at org.hibernate.type.EntityType.resolve(EntityType.java:303)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:113)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:842)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:223)
at org.hibernate.loader.Loader.loadCollection(Loader.java:1916)
at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:71)
at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:520)
at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1493)
at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:344)
at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
at org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:109)
at org.hibernate.collection.PersistentSet.size(PersistentSet.java:114)
at travelcenterhibernateweb.SessionBean1.getPersonsTrips(SessionBean1.java:171)
|#][/code]

Last edited by Saniya on Mon Feb 06, 2006 7:45 pm, edited 1 time in total.

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Saniya

Post subject:

Posted: Mon Feb 06, 2006 7:44 pm

Newbie

Joined: Tue Nov 22, 2005 11:28 am
Posts: 6

I'm still stuck with this problem, I'm not sure if its something to do with my mapping files. I saw this particular problem as an open issue with hibernate:
[url]http://opensource2.atlassian.com/projects/hibernate/browse/HHH-1365
[/url]

I dont think i'musing a sealed jar if thats why this above problem is being caused. Basically I have a Person class that has one-many associations with Trip class and Trip class has one-one association with TripType class.
Here is how i've put the associations:

Person.hbm.xml

Code:

<set name="trips" table="TRIP" lazy="true" inverse="true" cascade="all-delete-orphan">
         <key column="PERSONID"/>
         <one-to-many class="travelcenterhibernateweb.Trip"/>
    </set>

Trip.hbm.xml

Code:

<many-to-one  name="person"
                  column="PERSONID"
                  class="travelcenterhibernateweb.Person"
                  not-null="true"/>  
<many-to-one name="tripType"
                 column="TRIPTYPEID"
                 class="travelcenterhibernateweb.TripType"
                 unique="true"
                 not-null="true"/>

I hope somebody can help out here b4 i go crazy.. maybe its cglib.jar issue? not sure.

Thanks
S
[/code]

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wiphillyfan

Post subject: NPE in createProxy method of AbstractEntityTuplizer?

Posted: Tue Feb 14, 2006 6:13 pm

Beginner

Joined: Thu Jun 23, 2005 10:23 pm
Posts: 22

I'm getting the same NPE when trying to do a simple select using Criteria. I just got the latest 3.1.2 version and I'm going through the migration from 2.0.

java.lang.NullPointerException
at org.hibernate.tuple.AbstractEntityTuplizer.createProxy(Ljava.io.Seria
lizable;Lorg.hibernate.engine.SessionImplementor;)Ljava.lang.Object;(AbstractEnt
ityTuplizer.java:372)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(Lj
ava.io.Serializable;Lorg.hibernate.engine.SessionImplementor;)Ljava.lang.Object;
(AbstractEntityPersister.java:3121)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessa
ry(Lorg.hibernate.event.LoadEvent;Lorg.hibernate.persister.entity.EntityPersiste
r;Lorg.hibernate.engine.EntityKey;Lorg.hibernate.event.LoadEventListener$LoadTyp
e;Lorg.hibernate.engine.PersistenceContext;)Ljava.lang.Object;(DefaultLoadEventL
istener.java:232)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(Lorg.hib
ernate.event.LoadEvent;Lorg.hibernate.persister.entity.EntityPersister;Lorg.hibe
rnate.engine.EntityKey;Lorg.hibernate.event.LoadEventListener$LoadType;)Ljava.la
ng.Object;(DefaultLoadEventListener.java:173)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(Lorg.hibernat
e.event.LoadEvent;Lorg.hibernate.event.LoadEventListener$LoadType;)V(DefaultLoad
EventListener.java:87)

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baliukas

Post subject:

Posted: Wed Feb 15, 2006 3:37 am

CGLIB Developer

Joined: Thu Aug 28, 2003 1:44 pm
Posts: 1217
Location: Vilnius, Lithuania

Probably you need to configure security on application server, it looks like stack trace is incomplete, see root cause.

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Saniya

Post subject:

Posted: Wed Feb 15, 2006 5:12 pm

Newbie

Joined: Tue Nov 22, 2005 11:28 am
Posts: 6

Hey there..

Yes you need to give the following permissions..
grant codeBase ".../-"{
permission java.util.PropertyPermission "*", "read,write";
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.lang.RuntimePermission "accessDeclaredMembers";
permission java.lang.RuntimePermission "getProtectionDomain";
};

Saniya

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