[hibernate-issues] [Hibernate-JIRA] Created: (HHH-6162) SessionFactory in QueryKey

[Pawel Omelko (JIRA)]

SessionFactory in QueryKey
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                 Key: HHH-6162
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6162
             Project: Hibernate Core
          Issue Type: Bug
    Affects Versions: 4.0.0.Alpha2, 3.6.3, 4.0.0.Alpha1, 3.6.2
         Environment: Hibernate 3.6.2, Postgresql 8.3 
            Reporter: Pawel Omelko
            Priority: Blocker


I guess that after improvement HHH-5138, a ManyToOneType.java (and many other types) has reference to SessionFactory (by TypeFactory.TypeScope scope field). And now QueryKey, which contains Type[] positionalParameterTypes field, contains also SessionFactory - eg. ManyToOneType. So now we can find SessionFactory in QueryCache elements, which unnecessarily increase memory usage. There is another problem when cache replication is used (ehcache via RMI), I've got an exception during SessionFactory deserialization in receiver node:

Apr 27 06:17:58 WARN net.sf.ehcache.distribution.RMIAsynchronousCacheReplicator:320  - Unable to send message to remote peer.  Message was: null
Apr 27 06:17:58 java.lang.NullPointerException
Apr 27 06:17:58 at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768)
Apr 27 06:17:58 at org.hibernate.impl.SessionFactoryObjectFactory.getNamedInstance(SessionFactoryObjectFactory.java:159)
Apr 27 06:17:58 at org.hibernate.impl.SessionFactoryImpl.readResolve(SessionFactoryImpl.java:753)
Apr 27 06:17:58 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Apr 27 06:17:58 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
Apr 27 06:17:58 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
Apr 27 06:17:58 at java.lang.reflect.Method.invoke(Method.java:597)
Apr 27 06:17:58 at java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1061)
Apr 27 06:17:58 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1762)
Apr 27 06:17:58 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
Apr 27 06:17:58 at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
Apr 27 06:17:58 at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
Apr 27 06:17:58 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
Apr 27 06:17:58 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
Apr 27 06:17:58 at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
Apr 27 06:17:58 at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
Apr 27 06:17:58 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
Apr 27 06:17:58 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
Apr 27 06:17:58 at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667)
Apr 27 06:17:58 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323)
Apr 27 06:17:58 at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
Apr 27 06:17:58 at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:480)
Apr 27 06:17:58 at org.hibernate.cache.QueryKey.readObject(QueryKey.java:192)

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