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https://issues.apache.org/jira/browse/FELIX-3701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473818#comment-13473818
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Chetan Mehrotra commented on FELIX-3701:
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>> Are you sure that the fragments are being attached in the case where you see
>> failures?
Yup. I forgot to mention one aspect. The code in host bundle instantiates a
class (C1) using reflection which is present inline in FragBundle2 (i.e.
directly present). This class in turn depends on a class C2 which is present in
FragJar2-1. And CNFE is shown for C2 which confirms that C1 is found and hence
the fragment is resolved
Also as mentioned in logs above the FRAGMENT WIRE logs were present. Which
indicate that fragment bundle did got resolved.
>>Certainly a reproducible setup would be good.
Would try to create one
> 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: 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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