[Hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1293) java.lang.NoSuchMethodError: <persistent class>.getHibernateLazyInitializer()

[Joshua D. (JIRA) <no...@at...>]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1293?page=comments#action_21559 ] 

Joshua Davis commented on HHH-1293:
-----------------------------------

Switching to the 'server' JVM (I'm using RHEL3 and JDK1.4.2_09) seems to have fixed this for me.   We're switching to RHEL4 anyway because there are other problems with the Sun JVM on RHEL3.

I took a look at the code for multi-threaded access to proxies and I didn't find anything obviously wrong.   There are definitely no Sessions stored in HttpSessions, but there may be a proxy that is accessed by multiple threads.

Juozas,
Can you be a little more precise about where you think the thread safety problem is?   Is it in determining whether the proxy is initialized or not?

> java.lang.NoSuchMethodError: <persistent class>.getHibernateLazyInitializer()
> -----------------------------------------------------------------------------
>
>          Key: HHH-1293
>          URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1293
>      Project: Hibernate3
>         Type: Bug
>     Versions: 3.1
>     Reporter: Andreas Schildbach

>
>
> As documented in
> http://forum.hibernate.org/viewtopic.php?t=940119
> some people (including me) are getting this exception with the final release of Hibernate 3.1:
> java.lang.NoSuchMethodError: de.schildbach.game.integration.HibernateGamePlayer.getHibernateLazyInitializer()Lorg/hibernate/proxy/LazyInitializer;
>         at de.schildbach.game.integration.HibernateGamePlayer$$EnhancerByCGLIB$$afecb986.getHibernateLazyInitializer(<generated>)
>         at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:274)
>         at org.hibernate.type.ManyToOneType.assemble(ManyToOneType.java:177)
>         at org.hibernate.type.TypeFactory.assemble(TypeFactory.java:398)
>         at org.hibernate.cache.entry.CacheEntry.assemble(CacheEntry.java:96)
>         at org.hibernate.cache.entry.CacheEntry.assemble(CacheEntry.java:82)
>         at org.hibernate.event.def.DefaultLoadEventListener.assembleCacheEntry(DefaultLoadEventListener.java:520)
>         at org.hibernate.event.def.DefaultLoadEventListener.loadFromSecondLevelCache(DefaultLoadEventListener.java:474)
>         at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:328)
>         at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:123)
>         at org.hibernate.event.def.DefaultLoadEventListener.returnNarrowedProxy(DefaultLoadEventListener.java:202)
>         at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:169)
>         at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:87)
>         at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:869)
>         at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:838)
>         at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:266)
>         at org.hibernate.type.ManyToOneType.assemble(ManyToOneType.java:177)
>         at org.hibernate.collection.PersistentList.initializeFromCache(PersistentList.java:378)
>         at org.hibernate.cache.entry.CollectionCacheEntry.assemble(CollectionCacheEntry.java:35)
>         at org.hibernate.event.def.DefaultInitializeCollectionEventListener.initializeCollectionFromCache(DefaultInitializeCollectionEventListener.java:130)
>         at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:48)
>         at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1627)
>         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.PersistentList.size(PersistentList.java:91)
> The exception varies with the actual persistent class in use. Most people seem to be using JDK 1.5 and Linux. Some reports say that the exception does not happen from the very start of the application, but it takes "several invocations"/"some time" until it appear, but then it appears very often.

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