could not instantiate CacheProvider

matthew.eichler · **Posted:** Fri Jan 16, 2004 9:08 am

Hello all,

I have a very trivial prototype using our existing Oracle9i schema which works fine in stand-alone mode, but cannot load the CacheProvider when running within our web services framework. We are using Orion 1.5.4 and our web services have an HTTP dispatcher in a standard servlet configuration.

I have done the obvious things of copying the hibernate2.jar and ehcache.jar to orion and the WEB-INF/lib directories plus even including them in our own jar archives but still no luck.

Any help or hints much appreciated ...

Code:

net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.ehcache.hibernate.Provider 
at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:115) 
at net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1091) 
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:737) 
at com.dexels.sportlink.adapters.HibernateBaseMap.startHibernateSession(HibernateBaseMap.java:89) 
at com.dexels.sportlink.adapters.HibernateBaseMap.load(HibernateBaseMap.java:57) 
at InitHibernate.execute(InitHibernate.java:39) 
at com.dexels.navajo.server.GenericHandler.doService(GenericHandler.java:118) 
at com.dexels.navajo.server.ServiceHandler.construct(ServiceHandler.java:57) 
at com.dexels.navajo.persistence.impl.PersistenceManagerImpl.get(PersistenceManagerImpl.java:266) 
at com.dexels.navajo.server.Dispatcher.dispatch(Dispatcher.java:206) 
at com.dexels.navajo.server.Dispatcher.handle(Dispatcher.java:576) 
at com.dexels.navajo.server.listener.http.TmlHttpServlet.doPost(TmlHttpServlet.java:265) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:211) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336) 
at com.evermind._deb._lnc(.:514) 
at com.evermind._deb._wmb(.:170) 
at com.evermind._co._wbb(.:581) 
at com.evermind._co._fs(.:189) 
at com.evermind._bt.run(.:62) 
Caused by: java.lang.ClassCastException 
at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:112) 
... 19 more 

michael · **Posted:** Fri Jan 16, 2004 9:10 am

Missing ehcache.jar - might be a classloader Problem. This is a FAQ http://www.hibernate.org/74.html#A25

matthew.eichler · **Posted:** Fri Jan 16, 2004 10:22 am

gloeglm wrote:

Missing ehcache.jar - might be a classloader Problem. This is a FAQ http://www.hibernate.org/74.html#A25

Yes, I read this ... I've tried copying the ehcache.jar everywhee (to Orion, to WEB-INF/lib for our servlet), putting it in our own archives and even changing the CLASSPATH for Orion.

I do think this is a class loader problem, but I've completely run out of ideas.

michael · **Posted:** Fri Jan 16, 2004 10:27 am

Then set hibernate.cache.provider_class=net.sf.hibernate.cache.HashtableCacheProvider if you are not using caching this should not matter.

emmanuel · **Posted:** Fri Jan 16, 2004 10:40 am

matthew.eichler wrote:

but I've completely run out of ideas.

Manifest.mf

matthew.eichler · **Posted:** Fri Jan 16, 2004 10:58 am

emmanuel wrote:

matthew.eichler wrote:

but I've completely run out of ideas.

Manifest.mf

Can you elaborate a little?

Thanks ...

matthew.eichler · **Posted:** Fri Jan 16, 2004 12:32 pm

gloeglm wrote:

Then set hibernate.cache.provider_class=net.sf.hibernate.cache.HashtableCacheProvider if you are not using caching this should not matter.

OK, I trid this but all I get instead is,

Code:

net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.hibernate.cache.HashtableCacheProvider
        at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:115)
        at net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1091)
        at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:737)
        at com.dexels.sportlink.adapters.HibernateBaseMap.startHibernateSession(HibernateBaseMap.java:89)
        at com.dexels.sportlink.adapters.HibernateBaseMap.load(HibernateBaseMap.java:57)
        at InitHibernate.execute(InitHibernate.java:39)
        at com.dexels.navajo.server.GenericHandler.doService(GenericHandler.java:118)
        at com.dexels.navajo.server.ServiceHandler.construct(ServiceHandler.java:57)
        at com.dexels.navajo.persistence.impl.PersistenceManagerImpl.get(PersistenceManagerImpl.java:266)
        at com.dexels.navajo.server.Dispatcher.dispatch(Dispatcher.java:206)
        at com.dexels.navajo.server.Dispatcher.handle(Dispatcher.java:576)
        at com.dexels.navajo.server.listener.http.TmlHttpServlet.doPost(TmlHttpServlet.java:265)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:211)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
        at com.evermind._deb._lnc(.:514)
        at com.evermind._deb._wmb(.:170)
        at com.evermind._co._wbb(.:581)
        at com.evermind._co._fs(.:189)
        at com.evermind._bt.run(.:62)
Caused by: java.lang.ClassCastException
        at net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:112)
        ... 19 more

Here too are the log entries from Hibernate,

Code:

[ApplicationServerThread] INFO net.sf.hibernate.dialect.Dialect  - Using dialect: net.sf.hibernate.dialect.Oracle9Dialect
[ApplicationServerThread] WARN net.sf.hibernate.cfg.SettingsFactory  - No dialect set - using GenericDialect: Could not instantiate dialect class
[ApplicationServerThread] INFO net.sf.hibernate.dialect.Dialect  - Using dialect: net.sf.hibernate.dialect.GenericDialect
[ApplicationServerThread] INFO net.sf.hibernate.cfg.SettingsFactory  - Use outer join fetching: false
[ApplicationServerThread] WARN net.sf.hibernate.connection.UserSuppliedConnectionProvider  - No connection properties specified - the user must supply JDBC connections
[ApplicationServerThread] INFO net.sf.hibernate.transaction.TransactionManagerLookupFactory  - No TransactionManagerLookup configured (in JTA environment, use of process level read-write cache is not recommended)
[ApplicationServerThread] INFO net.sf.hibernate.cfg.SettingsFactory  - Use scrollable result sets: false
[ApplicationServerThread] INFO net.sf.hibernate.cfg.SettingsFactory  - echoing all SQL to stdout
[ApplicationServerThread] INFO net.sf.hibernate.cfg.SettingsFactory  - Query language substitutions: {}
[ApplicationServerThread] INFO net.sf.hibernate.cfg.SettingsFactory  - cache provider: net.sf.hibernate.cache.HashtableCacheProvider

michael · **Posted:** Fri Jan 16, 2004 12:34 pm

Okay. Old version of hibernate on the classpath or something like that? This is really impossible otherwise, net.sf.hibernate.cfg.SettingsFactory and net.sf.hibernate.cache.HashtableCacheProvider are in the same jar. You really must have something messed up.