Hi,

 

I’m currently have a problem with Felix and or IPojo.

Basically the problem is when Felix is starting up and services are still registering while and in the meantime a stop Felix is request.

The code to stop is simple : getBundle(0).stop();

 

If I have a look at the thread dump on JVisualVM, I have (full thread dump in attachement) :

 

"FelixStartLevel" daemon prio=6 tid=0x0000000006d6c000 nid=0xb00 waiting for monitor entry [0x0000000007fbf000]

   java.lang.Thread.State: BLOCKED (on object monitor)

                at org.apache.felix.ipojo.IPojoFactory.removeFactoryStateListener(IPojoFactory.java:491)

                - waiting to lock <0x00000000c048c790> (a org.apache.felix.ipojo.ComponentFactory)

                at org.apache.felix.ipojo.InstanceCreator.removeFactory(InstanceCreator.java:187)

                at org.apache.felix.ipojo.Extender.closeManagementFor(Extender.java:156)

                at org.apache.felix.ipojo.Extender.bundleChanged(Extender.java:129)

                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:4245)

                at org.apache.felix.framework.Felix.stopBundle(Felix.java:2352)

                at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1215)

                at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:295)

                at java.lang.Thread.run(Unknown Source)

 

   Locked ownable synchronizers:

                - None

 

And

 

"Thread-2" daemon prio=6 tid=0x0000000007050800 nid=0x6d8 in Object.wait() [0x00000000084bd000]

   java.lang.Thread.State: WAITING (on object monitor)

                at java.lang.Object.wait(Native Method)

                - waiting on <0x00000000c029d238> (a [Ljava.lang.Object;)

                at java.lang.Object.wait(Object.java:485)

                at org.apache.felix.framework.Felix.acquireBundleLock(Felix.java:4872)

                - locked <0x00000000c029d238> (a [Ljava.lang.Object;)

                at org.apache.felix.framework.Felix.registerService(Felix.java:3206)

                at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)

                at org.apache.felix.ipojo.IPojoContext.registerService(IPojoContext.java:338)

                at org.apache.felix.ipojo.handlers.providedservice.ProvidedService.registerService(ProvidedService.java:345)

                - locked <0x00000000eafc8ea0> (a org.apache.felix.ipojo.handlers.providedservice.ProvidedService)

                at org.apache.felix.ipojo.handlers.providedservice.ProvidedServiceHandler.__stateChanged(ProvidedServiceHandler.java:494)

                at org.apache.felix.ipojo.handlers.providedservice.ProvidedServiceHandler.stateChanged(ProvidedServiceHandler.java)

                at org.apache.felix.ipojo.InstanceManager.setState(InstanceManager.java:471)

                at org.apache.felix.ipojo.InstanceManager.start(InstanceManager.java:353)

                at org.apache.felix.ipojo.ComponentFactory.createInstance(ComponentFactory.java:166)

                at org.apache.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.java:301)

                - locked <0x00000000c048c790> (a org.apache.felix.ipojo.ComponentFactory)

                at org.apache.felix.ipojo.IPojoFactory.createComponentInstance(IPojoFactory.java:238)

                at org.apache.felix.ipojo.Factory$$Proxy.createComponentInstance(Unknown Source)

                at com.axway.cmp.ume.ui.internal.ComponentDefinition.__createAndStart(ComponentDefinition.java:147)

                at com.axway.cmp.ume.ui.internal.ComponentDefinition.createAndStart(ComponentDefinition.java)

                at com.axway.cmp.ume.ui.internal.ComponentDefinition.__validate(ComponentDefinition.java:85)

                at com.axway.cmp.ume.ui.internal.ComponentDefinition.validate(ComponentDefinition.java)

                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

                at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

                at java.lang.reflect.Method.invoke(Unknown Source)

                at org.apache.felix.ipojo.util.Callback.call(Callback.java:237)

                at org.apache.felix.ipojo.util.Callback.call(Callback.java:193)

                at org.apache.felix.ipojo.handlers.lifecycle.callback.LifecycleCallback.call(LifecycleCallback.java:86)

                at org.apache.felix.ipojo.handlers.lifecycle.callback.LifecycleCallbackHandler.__stateChanged(LifecycleCallbackHandler.java:162)

                at org.apache.felix.ipojo.handlers.lifecycle.callback.LifecycleCallbackHandler.stateChanged(LifecycleCallbackHandler.java)

                at org.apache.felix.ipojo.InstanceManager.setState(InstanceManager.java:471)

                at org.apache.felix.ipojo.InstanceManager.stateChanged(InstanceManager.java:1314)

                at org.apache.felix.ipojo.InstanceManager.setState(InstanceManager.java:496)

                at org.apache.felix.ipojo.HandlerManager.stateChanged(HandlerManager.java:239)

                at org.apache.felix.ipojo.Handler.setValidity(Handler.java:174)

                at org.apache.felix.ipojo.handlers.dependency.DependencyHandler.__checkContext(DependencyHandler.java:186)

                - locked <0x00000000c048e1a8> (a [Lorg.apache.felix.ipojo.handlers.dependency.Dependency;)

                at org.apache.felix.ipojo.handlers.dependency.DependencyHandler.checkContext(DependencyHandler.java)

                at org.apache.felix.ipojo.handlers.dependency.DependencyHandler.__validate(DependencyHandler.java:149)

                at org.apache.felix.ipojo.handlers.dependency.DependencyHandler.validate(DependencyHandler.java)

                at org.apache.felix.ipojo.util.DependencyModel.validate(DependencyModel.java:642)

                at org.apache.felix.ipojo.util.DependencyModel.computeDependencyState(DependencyModel.java:310)

                at org.apache.felix.ipojo.util.DependencyModel.manageArrival(DependencyModel.java:399)

                at org.apache.felix.ipojo.util.DependencyModel.addedService(DependencyModel.java:335)

                at org.apache.felix.ipojo.util.Tracker$Tracked.trackAdding(Tracker.java:725)

                at org.apache.felix.ipojo.util.Tracker$Tracked.track(Tracker.java:686)

                at org.apache.felix.ipojo.util.Tracker$Tracked.serviceChanged(Tracker.java:647)

                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:4261)

                at org.apache.felix.framework.Felix.registerService(Felix.java:3276)

                at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)

                at org.apache.felix.ipojo.IPojoFactory.start(IPojoFactory.java:591)

                - locked <0x00000000c048c790> (a org.apache.felix.ipojo.ComponentFactory)

                at org.apache.felix.ipojo.Extender.createAbstractFactory(Extender.java:439)

                at org.apache.felix.ipojo.Extender.parse(Extender.java:264)

                at org.apache.felix.ipojo.Extender.startManagementFor(Extender.java:208)

                at org.apache.felix.ipojo.Extender.access$600(Extender.java:52)

                at org.apache.felix.ipojo.Extender$CreatorThread.run(Extender.java:682)

                at java.lang.Thread.run(Unknown Source)

 

While I’m still investigating what’s happen, it looks like I’m having the issue https://issues.apache.org/jira/browse/FELIX-3393  but I’m not sure

I’m using Felix 4.0.2, but I got the same problem with the latest trunk.

 

I would like to do a simple test case to reproduce the problem on a simple test case, but without success for the moment.

Is it possible that the #3393 issue may be the root cause ?

Maybe an iPojo issue ? (I could post a brief sample of what I do with iPojo factories in ComponentDefinition class if it helps)

Or maybe my code (Normally 99,99% of the time it’s my fault) ;-)

 

Thanks for your help

WBR // David