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From "Joe Bohn (JIRA)" <j...@apache.org>
Subject [jira] Commented: (ARIES-378) Samples error after restart of Blog or AriesTrader sample using JPA
Date Thu, 12 Aug 2010 16:37:15 GMT

    [ https://issues.apache.org/jira/browse/ARIES-378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897825#action_12897825
] 

Joe Bohn commented on ARIES-378:
--------------------------------

Moving to openjpa 2.0.0 didn't seem to change things.  However, I did notice this exception
earlier in the log which appears to be related.   I'll give the patch you provided a try soon.

[Start Level Event Dispatcher] DEBUG org.apache.aries.jpa.container - Located Persistence
units: [Persistence unit blogExample in bundle org.apache.aries.samples.blog.persistence.jpa_0.2.0.incubating-SNAPSHOT]
[Start Level Event Dispatcher] ERROR org.apache.aries.jpa.container - No JTA datasource could
be located using the JNDI name osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/blogdb)
javax.naming.NameNotFoundException: osgi:service/javax.sql.DataSource/"(osgi.jndi.service.name=jdbc/blogdb)"
        at org.apache.aries.jndi.url.ServiceRegistryContext.lookup(ServiceRegistryContext.java:110)
        at org.apache.aries.jndi.url.ServiceRegistryContext.lookup(ServiceRegistryContext.java:141)
        at org.apache.aries.jndi.DelegateContext.lookup(DelegateContext.java:148)
        at javax.naming.InitialContext.lookup(InitialContext.java:392)
        at org.apache.aries.jpa.container.unit.impl.PersistenceUnitInfoImpl.getJtaDataSource(PersistenceUnitInfoImpl.java:101)
        at org.apache.openjpa.persistence.PersistenceUnitInfoImpl.toOpenJPAProperties(PersistenceUnitInfoImpl.java:354)
        at org.apache.openjpa.persistence.PersistenceProductDerivation.load(PersistenceProductDerivation.java:314)
        at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:161)
        at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:65)
        at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.createEntityManagerFactories(EntityManagerFactoryManager.java:262)
        at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.registerEntityManagerFactories(EntityManagerFactoryManager.java:203)
        at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.bundleStateChange(EntityManagerFactoryManager.java:158)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.setupManager(PersistenceBundleManager.java:384)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.addingBundle(PersistenceBundleManager.java:148)
        at org.apache.aries.util.tracker.InternalRecursiveBundleTracker.addingBundle(InternalRecursiveBundleTracker.java:70)
        at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:440)
        at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
        at org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:184)
        at org.osgi.util.tracker.BundleTracker.open(BundleTracker.java:159)
        at org.apache.aries.util.tracker.RecursiveBundleTracker.open(RecursiveBundleTracker.java:77)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.open(PersistenceBundleManager.java:132)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.start(PersistenceBundleManager.java:619)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:782)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:773)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:754)
        at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:352)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:370)
        at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1068)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:557)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:464)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:248)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:445)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:220)
        at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:330)
[Start Level Event Dispatcher] ERROR org.apache.aries.jpa.container - No Non JTA datasource
could be located using the JNDI name osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/blogdbnojta)
javax.naming.NameNotFoundException: osgi:service/javax.sql.DataSource/"(osgi.jndi.service.name=jdbc/blogdbnojta)"
        at org.apache.aries.jndi.url.ServiceRegistryContext.lookup(ServiceRegistryContext.java:110)
        at org.apache.aries.jndi.url.ServiceRegistryContext.lookup(ServiceRegistryContext.java:141)
        at org.apache.aries.jndi.DelegateContext.lookup(DelegateContext.java:148)
        at javax.naming.InitialContext.lookup(InitialContext.java:392)
        at org.apache.aries.jpa.container.unit.impl.PersistenceUnitInfoImpl.getNonJtaDataSource(PersistenceUnitInfoImpl.java:139)
        at org.apache.openjpa.persistence.PersistenceUnitInfoImpl.toOpenJPAProperties(PersistenceUnitInfoImpl.java:367)
        at org.apache.openjpa.persistence.PersistenceProductDerivation.load(PersistenceProductDerivation.java:314)
        at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:161)
        at org.apache.openjpa.persistence.PersistenceProviderImpl.createContainerEntityManagerFactory(PersistenceProviderImpl.java:65)
        at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.createEntityManagerFactories(EntityManagerFactoryManager.java:262)
        at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.registerEntityManagerFactories(EntityManagerFactoryManager.java:203)
        at org.apache.aries.jpa.container.impl.EntityManagerFactoryManager.bundleStateChange(EntityManagerFactoryManager.java:158)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.setupManager(PersistenceBundleManager.java:384)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.addingBundle(PersistenceBundleManager.java:148)
        at org.apache.aries.util.tracker.InternalRecursiveBundleTracker.addingBundle(InternalRecursiveBundleTracker.java:70)
        at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:440)
        at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261)
        at org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:184)
        at org.osgi.util.tracker.BundleTracker.open(BundleTracker.java:159)
        at org.apache.aries.util.tracker.RecursiveBundleTracker.open(RecursiveBundleTracker.java:77)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.open(PersistenceBundleManager.java:132)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.start(PersistenceBundleManager.java:619)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:782)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:773)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:754)
        at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:352)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:370)
        at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1068)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:557)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:464)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:248)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:445)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:220)
        at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:330)
[Start Level Event Dispatcher] DEBUG org.apache.aries.samples.blog.persistence.jpa - ServiceEvent
REGISTERED
[Start Level Event Dispatcher] INFO org.apache.aries.jpa.container - No quiesce support is
available, so persistence contexts will not participate in quiesce operations
java.lang.ClassNotFoundException: org.apache.aries.quiesce.participant.QuiesceParticipant
        at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:489)
        at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:405)
        at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:393)
        at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:105)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
        at org.eclipse.osgi.internal.loader.BundleLoader.loadClass(BundleLoader.java:321)
        at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:231)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1193)
        at org.apache.aries.jpa.container.impl.PersistenceBundleManager.start(PersistenceBundleManager.java:622)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:782)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:773)
        at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:754)
        at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:352)
        at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:370)
        at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1068)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:557)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:464)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:248)
        at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:445)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:220)
        at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:330)
[Start Level Event Dispatcher] DEBUG org.ops4j.pax.swissbox.extender.BundleWatcher - Scanning
bundle [org.apache.aries.jpa.container]

> Samples error after restart of Blog or AriesTrader sample using JPA
> -------------------------------------------------------------------
>
>                 Key: ARIES-378
>                 URL: https://issues.apache.org/jira/browse/ARIES-378
>             Project: Aries
>          Issue Type: Bug
>          Components: Samples
>    Affects Versions: 0.2
>         Environment: OS/X   10.5.8
> java version "1.6.0_20"
> Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-9M3165)
> Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode)
>            Reporter: Joe Bohn
>         Attachments: Delayed DataSource Lookup.txt
>
>
> While running the Blog sample in the provided Blog-Assembly and the JPA EBA I noticed
the following error.   Starting the sample works as expected and everything works fine the
first time.  However, after stopping and then restarting the assembly the following error
is encountered when trying to do anything that will access JPA persistence.   I also noticed
the same error using the AriesTrader sample when using JPA persistence (either application
manager or container managed).  If I used JDBC persistence for AriesTrader I did not encounter
the error.  
> A JDBC Driver or DataSource class name must be specified in the ConnectionDriverName
property
> Here is the complete output with full stack trace from the Blog sample:
> Problem accessing /org.apache.aries.samples.blog.web/ViewBlog. Reason:
>     There were errors initializing your configuration: <openjpa-2.0.0-beta3-r422266:926797
fatal user error> org.apache.openjpa.util.UserException: A JDBC Driver or DataSource class
name must be specified in the ConnectionDriverName property.
> 	at org.apache.openjpa.jdbc.schema.DataSourceFactory.newDataSource(DataSourceFactory.java:76)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.createConnectionFactory(JDBCConfigurationImpl.java:836)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getConnectionFactory(JDBCConfigurationImpl.java:724)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.openjpa.lib.conf.ConfigurationImpl.instantiateAll(ConfigurationImpl.java:294)
> 	at org.apache.openjpa.conf.OpenJPAConfigurationImpl.instantiateAll(OpenJPAConfigurationImpl.java:1602)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:634)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:193)
> 	at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:213)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:57)
> 	at org.apache.aries.jpa.container.impl.CountingEntityManagerFactory.createEntityManager(CountingEntityManagerFactory.java:70)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAPersistenceContextRegistry.getCurrentPersistenceContext(JTAPersistenceContextRegistry.java:131)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.getPersistenceContext(JTAEntityManager.java:86)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.createQuery(JTAEntityManager.java:163)
> 	at org.apache.aries.samples.blog.persistence.jpa.BlogPersistenceServiceImpl.getNoOfBlogEntries(BlogPersistenceServiceImpl.java:119)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.proxy.Collaborator$1.invoke(Collaborator.java:66)
> 	at org.apache.aries.blueprint.proxy.Collaborator.invoke(Collaborator.java:151)
> 	at org.apache.aries.samples.blog.persistence.jpa.$BlogPersistenceServiceImpl2018048960.getNoOfBlogEntries(Unknown
Source)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe$JdkProxyFactory$1.invoke(AbstractServiceReferenceRecipe.java:632)
> 	at $Proxy9.getNoOfBlogEntries(Unknown Source)
> 	at org.apache.aries.samples.blog.biz.BlogEntryManagerImpl.getNoOfPosts(BlogEntryManagerImpl.java:89)
> 	at org.apache.aries.samples.blog.biz.BloggingServiceImpl.getNoOfEntries(BloggingServiceImpl.java:98)
> 	at org.apache.aries.samples.blog.web.ViewBlog.doGet(ViewBlog.java:66)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> 	at org.ops4j.pax.web.service.internal.WelcomeFilesFilter.doFilter(WelcomeFilesFilter.java:169)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.handle(HttpServiceServletHandler.java:64)
> 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.handle(HttpServiceContext.java:111)
> 	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:64)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:322)
> 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> Caused by:
> <openjpa-2.0.0-beta3-r422266:926797 nonfatal general error> org.apache.openjpa.persistence.PersistenceException:
There were errors initializing your configuration: <openjpa-2.0.0-beta3-r422266:926797
fatal user error> org.apache.openjpa.util.UserException: A JDBC Driver or DataSource class
name must be specified in the ConnectionDriverName property.
> 	at org.apache.openjpa.jdbc.schema.DataSourceFactory.newDataSource(DataSourceFactory.java:76)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.createConnectionFactory(JDBCConfigurationImpl.java:836)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getConnectionFactory(JDBCConfigurationImpl.java:724)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.openjpa.lib.conf.ConfigurationImpl.instantiateAll(ConfigurationImpl.java:294)
> 	at org.apache.openjpa.conf.OpenJPAConfigurationImpl.instantiateAll(OpenJPAConfigurationImpl.java:1602)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:634)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:193)
> 	at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:213)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:57)
> 	at org.apache.aries.jpa.container.impl.CountingEntityManagerFactory.createEntityManager(CountingEntityManagerFactory.java:70)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAPersistenceContextRegistry.getCurrentPersistenceContext(JTAPersistenceContextRegistry.java:131)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.getPersistenceContext(JTAEntityManager.java:86)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.createQuery(JTAEntityManager.java:163)
> 	at org.apache.aries.samples.blog.persistence.jpa.BlogPersistenceServiceImpl.getNoOfBlogEntries(BlogPersistenceServiceImpl.java:119)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.proxy.Collaborator$1.invoke(Collaborator.java:66)
> 	at org.apache.aries.blueprint.proxy.Collaborator.invoke(Collaborator.java:151)
> 	at org.apache.aries.samples.blog.persistence.jpa.$BlogPersistenceServiceImpl2018048960.getNoOfBlogEntries(Unknown
Source)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe$JdkProxyFactory$1.invoke(AbstractServiceReferenceRecipe.java:632)
> 	at $Proxy9.getNoOfBlogEntries(Unknown Source)
> 	at org.apache.aries.samples.blog.biz.BlogEntryManagerImpl.getNoOfPosts(BlogEntryManagerImpl.java:89)
> 	at org.apache.aries.samples.blog.biz.BloggingServiceImpl.getNoOfEntries(BloggingServiceImpl.java:98)
> 	at org.apache.aries.samples.blog.web.ViewBlog.doGet(ViewBlog.java:66)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> 	at org.ops4j.pax.web.service.internal.WelcomeFilesFilter.doFilter(WelcomeFilesFilter.java:169)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.handle(HttpServiceServletHandler.java:64)
> 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.handle(HttpServiceContext.java:111)
> 	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:64)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:322)
> 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:208)
> 	at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:213)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:57)
> 	at org.apache.aries.jpa.container.impl.CountingEntityManagerFactory.createEntityManager(CountingEntityManagerFactory.java:70)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAPersistenceContextRegistry.getCurrentPersistenceContext(JTAPersistenceContextRegistry.java:131)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.getPersistenceContext(JTAEntityManager.java:86)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.createQuery(JTAEntityManager.java:163)
> 	at org.apache.aries.samples.blog.persistence.jpa.BlogPersistenceServiceImpl.getNoOfBlogEntries(BlogPersistenceServiceImpl.java:119)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.proxy.Collaborator$1.invoke(Collaborator.java:66)
> 	at org.apache.aries.blueprint.proxy.Collaborator.invoke(Collaborator.java:151)
> 	at org.apache.aries.samples.blog.persistence.jpa.$BlogPersistenceServiceImpl2018048960.getNoOfBlogEntries(Unknown
Source)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe$JdkProxyFactory$1.invoke(AbstractServiceReferenceRecipe.java:632)
> 	at $Proxy9.getNoOfBlogEntries(Unknown Source)
> 	at org.apache.aries.samples.blog.biz.BlogEntryManagerImpl.getNoOfPosts(BlogEntryManagerImpl.java:89)
> 	at org.apache.aries.samples.blog.biz.BloggingServiceImpl.getNoOfEntries(BloggingServiceImpl.java:98)
> 	at org.apache.aries.samples.blog.web.ViewBlog.doGet(ViewBlog.java:66)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> 	at org.ops4j.pax.web.service.internal.WelcomeFilesFilter.doFilter(WelcomeFilesFilter.java:169)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.handle(HttpServiceServletHandler.java:64)
> 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.handle(HttpServiceContext.java:111)
> 	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:64)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:322)
> 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> Caused by: java.lang.RuntimeException: There were errors initializing your configuration:
<openjpa-2.0.0-beta3-r422266:926797 fatal user error> org.apache.openjpa.util.UserException:
A JDBC Driver or DataSource class name must be specified in the ConnectionDriverName property.
> 	at org.apache.openjpa.jdbc.schema.DataSourceFactory.newDataSource(DataSourceFactory.java:76)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.createConnectionFactory(JDBCConfigurationImpl.java:836)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getConnectionFactory(JDBCConfigurationImpl.java:724)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.openjpa.lib.conf.ConfigurationImpl.instantiateAll(ConfigurationImpl.java:294)
> 	at org.apache.openjpa.conf.OpenJPAConfigurationImpl.instantiateAll(OpenJPAConfigurationImpl.java:1602)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:634)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:193)
> 	at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:213)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:57)
> 	at org.apache.aries.jpa.container.impl.CountingEntityManagerFactory.createEntityManager(CountingEntityManagerFactory.java:70)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAPersistenceContextRegistry.getCurrentPersistenceContext(JTAPersistenceContextRegistry.java:131)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.getPersistenceContext(JTAEntityManager.java:86)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.createQuery(JTAEntityManager.java:163)
> 	at org.apache.aries.samples.blog.persistence.jpa.BlogPersistenceServiceImpl.getNoOfBlogEntries(BlogPersistenceServiceImpl.java:119)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.proxy.Collaborator$1.invoke(Collaborator.java:66)
> 	at org.apache.aries.blueprint.proxy.Collaborator.invoke(Collaborator.java:151)
> 	at org.apache.aries.samples.blog.persistence.jpa.$BlogPersistenceServiceImpl2018048960.getNoOfBlogEntries(Unknown
Source)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe$JdkProxyFactory$1.invoke(AbstractServiceReferenceRecipe.java:632)
> 	at $Proxy9.getNoOfBlogEntries(Unknown Source)
> 	at org.apache.aries.samples.blog.biz.BlogEntryManagerImpl.getNoOfPosts(BlogEntryManagerImpl.java:89)
> 	at org.apache.aries.samples.blog.biz.BloggingServiceImpl.getNoOfEntries(BloggingServiceImpl.java:98)
> 	at org.apache.aries.samples.blog.web.ViewBlog.doGet(ViewBlog.java:66)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> 	at org.ops4j.pax.web.service.internal.WelcomeFilesFilter.doFilter(WelcomeFilesFilter.java:169)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.handle(HttpServiceServletHandler.java:64)
> 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.handle(HttpServiceContext.java:111)
> 	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:64)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:322)
> 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> 	at org.apache.openjpa.lib.conf.ConfigurationImpl.instantiateAll(ConfigurationImpl.java:308)
> 	at org.apache.openjpa.conf.OpenJPAConfigurationImpl.instantiateAll(OpenJPAConfigurationImpl.java:1602)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:634)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:193)
> 	... 45 more
> Caused by:
> java.lang.RuntimeException: There were errors initializing your configuration: <openjpa-2.0.0-beta3-r422266:926797
fatal user error> org.apache.openjpa.util.UserException: A JDBC Driver or DataSource class
name must be specified in the ConnectionDriverName property.
> 	at org.apache.openjpa.jdbc.schema.DataSourceFactory.newDataSource(DataSourceFactory.java:76)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.createConnectionFactory(JDBCConfigurationImpl.java:836)
> 	at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getConnectionFactory(JDBCConfigurationImpl.java:724)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.openjpa.lib.conf.ConfigurationImpl.instantiateAll(ConfigurationImpl.java:294)
> 	at org.apache.openjpa.conf.OpenJPAConfigurationImpl.instantiateAll(OpenJPAConfigurationImpl.java:1602)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:634)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:193)
> 	at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:213)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:57)
> 	at org.apache.aries.jpa.container.impl.CountingEntityManagerFactory.createEntityManager(CountingEntityManagerFactory.java:70)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAPersistenceContextRegistry.getCurrentPersistenceContext(JTAPersistenceContextRegistry.java:131)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.getPersistenceContext(JTAEntityManager.java:86)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.createQuery(JTAEntityManager.java:163)
> 	at org.apache.aries.samples.blog.persistence.jpa.BlogPersistenceServiceImpl.getNoOfBlogEntries(BlogPersistenceServiceImpl.java:119)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.proxy.Collaborator$1.invoke(Collaborator.java:66)
> 	at org.apache.aries.blueprint.proxy.Collaborator.invoke(Collaborator.java:151)
> 	at org.apache.aries.samples.blog.persistence.jpa.$BlogPersistenceServiceImpl2018048960.getNoOfBlogEntries(Unknown
Source)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe$JdkProxyFactory$1.invoke(AbstractServiceReferenceRecipe.java:632)
> 	at $Proxy9.getNoOfBlogEntries(Unknown Source)
> 	at org.apache.aries.samples.blog.biz.BlogEntryManagerImpl.getNoOfPosts(BlogEntryManagerImpl.java:89)
> 	at org.apache.aries.samples.blog.biz.BloggingServiceImpl.getNoOfEntries(BloggingServiceImpl.java:98)
> 	at org.apache.aries.samples.blog.web.ViewBlog.doGet(ViewBlog.java:66)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> 	at org.ops4j.pax.web.service.internal.WelcomeFilesFilter.doFilter(WelcomeFilesFilter.java:169)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.handle(HttpServiceServletHandler.java:64)
> 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.handle(HttpServiceContext.java:111)
> 	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:64)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:322)
> 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> 	at org.apache.openjpa.lib.conf.ConfigurationImpl.instantiateAll(ConfigurationImpl.java:308)
> 	at org.apache.openjpa.conf.OpenJPAConfigurationImpl.instantiateAll(OpenJPAConfigurationImpl.java:1602)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:634)
> 	at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:193)
> 	at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:213)
> 	at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:57)
> 	at org.apache.aries.jpa.container.impl.CountingEntityManagerFactory.createEntityManager(CountingEntityManagerFactory.java:70)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAPersistenceContextRegistry.getCurrentPersistenceContext(JTAPersistenceContextRegistry.java:131)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.getPersistenceContext(JTAEntityManager.java:86)
> 	at org.apache.aries.jpa.container.context.transaction.impl.JTAEntityManager.createQuery(JTAEntityManager.java:163)
> 	at org.apache.aries.samples.blog.persistence.jpa.BlogPersistenceServiceImpl.getNoOfBlogEntries(BlogPersistenceServiceImpl.java:119)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.proxy.Collaborator$1.invoke(Collaborator.java:66)
> 	at org.apache.aries.blueprint.proxy.Collaborator.invoke(Collaborator.java:151)
> 	at org.apache.aries.samples.blog.persistence.jpa.$BlogPersistenceServiceImpl2018048960.getNoOfBlogEntries(Unknown
Source)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe$JdkProxyFactory$1.invoke(AbstractServiceReferenceRecipe.java:632)
> 	at $Proxy9.getNoOfBlogEntries(Unknown Source)
> 	at org.apache.aries.samples.blog.biz.BlogEntryManagerImpl.getNoOfPosts(BlogEntryManagerImpl.java:89)
> 	at org.apache.aries.samples.blog.biz.BloggingServiceImpl.getNoOfEntries(BloggingServiceImpl.java:98)
> 	at org.apache.aries.samples.blog.web.ViewBlog.doGet(ViewBlog.java:66)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> 	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
> 	at org.ops4j.pax.web.service.internal.WelcomeFilesFilter.doFilter(WelcomeFilesFilter.java:169)
> 	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1148)
> 	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:387)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.handle(HttpServiceServletHandler.java:64)
> 	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> 	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.handle(HttpServiceContext.java:111)
> 	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:64)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:322)
> 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:534)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:864)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:539)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)

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