I don't know if that may be your issue but in the book "OSGi in action"
[1] they recommend that if a bundle want to stop itself, it should do so
in a different thread. This is to avoid possible deadlocks if as part of
the bundle finalization there is any waiting for the calls to finish.
You can refer to the book's source code examples [2].
HTH, Regards
[1] http://www.manning.com/hall/
[2]
http://code.google.com/p/osgi-in-action/source/browse/trunk/chapter03/shell-example/org.foo.shell/src/org/foo/shell/StopCommand.java
On 02/04/12 14:46, Gay David (Annecy) wrote:
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
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