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https://issues.apache.org/jira/browse/FELIX-3701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13947935#comment-13947935
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Richard S. Hall commented on FELIX-3701:
----------------------------------------
Interesting. I can't say that I fully understand the situation and/or why it
occurs, but if what you are saying is the case, then yes that would be
problematic and needs to be fixed.
> Intermittent CNFE with embedded jars in Fragment Bundles
> --------------------------------------------------------
>
> Key: FELIX-3701
> URL: https://issues.apache.org/jira/browse/FELIX-3701
> Project: Felix
> Issue Type: Bug
> Components: Framework
> Affects Versions: framework-4.0.2
> Reporter: Chetan Mehrotra
> Priority: Minor
> Attachments: debug info.jpg, fragment-bug.zip
>
>
> In our Sling based OSGi application we are observing intermittent
> ClassNotFoundException for classes which are present in a jar embedded in
> Fragment bundle. Below are the details about the scenario
> 1. Host bundle BundleA com.day.crx.sling.server [52]
> 2. It has two fragment bundles attached.
> - FragBundle1 - com.day.crx.crx-auth-ldap
> - FragBundle2 - org.jcrutil.aws
> 3. FragBundle2 - Has some embedded jars referred in the classpath
> - FragJar2-1 - aws-java-sdk-1.3.11.jar
> - FragJar2-2 - httpclient-4.2-beta1.jar
> 4. There is a DS Component in BundleA which on activate tries to create an
> instance of class which is present in FragJar2-1
> Now the issue is at times on clean start we get a CNFE at #4. On getting the
> Felix debug logs following things were observed
> 1. The logs report that INFO: Bundle BundleA [52] Class path entry not found:
> FragJar2-1.jar
> 2. The above entries are not observed if CNFE is not thrown
> 3. If I try to debug the code the issue goes away which indicates that its
> possible a race condition issue
> 4. In case the issue is seen and I see the fragment bundle dir in the felix
> folder the fragment jar is NOT exploded i.e. no bundle.jar-embedded directory
> 5. Once the issue is seen it does not go away in restart
> 6. The issue was not seen in 3.0.x releases
> 7. If I flatten the jars present in fragment bundles the issue is not seen
> 8. Exception seen is [1]
> [1]
> 05.10.2012 12:03:19.362 *ERROR* [FelixStartLevel] com.day.crx.sling.server
> [com.day.crx.sling.server.impl.jmx.ManagedRepository] The activate method has
> thrown an exception (java.lang.NoClassDefFoundError:
> com/amazonaws/services/s3/model/S3ObjectSummary)
> java.lang.NoClassDefFoundError:
> com/amazonaws/services/s3/model/S3ObjectSummary
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:247)
> at
> org.apache.jackrabbit.core.config.SimpleBeanFactory.newInstance(SimpleBeanFactory.java:30)
> at
> org.apache.jackrabbit.core.config.BeanConfig.newInstance(BeanConfig.java:191)
> at
> org.apache.jackrabbit.core.config.RepositoryConfigurationParser$4.getDataStore(RepositoryConfigurationParser.java:997)
> at
> org.apache.jackrabbit.core.config.RepositoryConfig.getDataStore(RepositoryConfig.java:1072)
> at
> org.apache.jackrabbit.core.RepositoryImpl.<init>(RepositoryImpl.java:279)
> at com.day.crx.core.CRXRepositoryImpl.<init>(CRXRepositoryImpl.java:307)
> at com.day.crx.core.CRXRepositoryImpl.create(CRXRepositoryImpl.java:262)
> at com.day.crx.core.CRXRepositoryImpl.create(CRXRepositoryImpl.java:245)
> at
> com.day.crx.sling.server.impl.jmx.ManagedRepository.activate(ManagedRepository.java:169)
> 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.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:227)
> at
> org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:38)
> at
> org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:591)
> at
> org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:472)
> at
> org.apache.felix.scr.impl.helper.ActivateMethod.invoke(ActivateMethod.java:146)
> at
> org.apache.felix.scr.impl.manager.ImmediateComponentManager.createImplementationObject(ImmediateComponentManager.java:226)
> at
> org.apache.felix.scr.impl.manager.ImmediateComponentManager.createComponent(ImmediateComponentManager.java:118)
> at
> org.apache.felix.scr.impl.manager.DelayedComponentManager.createRealComponent(DelayedComponentManager.java:95)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager$Registered.getService(AbstractComponentManager.java:1296)
> at
> org.apache.felix.scr.impl.manager.DelayedComponentManager.getService(DelayedComponentManager.java:88)
> at
> org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:308)
> at
> org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:219)
> at
> org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:310)
> at org.apache.felix.framework.Felix.getService(Felix.java:3420)
> at
> org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:468)
> at
> org.osgi.util.tracker.ServiceTracker.addingService(ServiceTracker.java:450)
> at
> org.apache.aries.jmx.whiteboard.Activator$MBeanTracker.addingService(Activator.java:101)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:980)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:906)
> at
> org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:262)
> at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:234)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:941)
> at
> org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932)
> at
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:793)
> at
> org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:543)
> at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4260)
> at org.apache.felix.framework.Felix.registerService(Felix.java:3275)
> at
> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:456)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:508)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1157)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:334)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:158)
> at
> org.apache.felix.scr.impl.config.ImmediateComponentHolder.enableComponents(ImmediateComponentHolder.java:313)
> at
> org.apache.felix.scr.impl.BundleComponentActivator.loadDescriptor(BundleComponentActivator.java:241)
> at
> org.apache.felix.scr.impl.BundleComponentActivator.initialize(BundleComponentActivator.java:147)
> at
> org.apache.felix.scr.impl.BundleComponentActivator.<init>(BundleComponentActivator.java:111)
> at
> org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:274)
> at org.apache.felix.scr.impl.Activator.bundleChanged(Activator.java:192)
> at
> org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:868)
> at
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:789)
> at
> org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:514)
> at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4244)
> at org.apache.felix.framework.Felix.startBundle(Felix.java:1923)
> at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1191)
> at
> org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:295)
> at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.ClassNotFoundException: *** Class
> 'com.amazonaws.services.s3.model.S3ObjectSummary' was not found. Bundle
> com.day.crx.sling.server [52] does not import package
> 'com.amazonaws.services.s3.model', nor is the package exported by any other
> bundle or available from the system class loader. ***
> at
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1857)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> ... 62 more
> Caused by: java.lang.ClassNotFoundException:
> com.amazonaws.services.s3.model.S3ObjectSummary not found by
> com.day.crx.sling.server [52]
> at
> org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1460)
> at
> org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:72)
> at
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1843)
> ... 63 more
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