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Posted to dev@felix.apache.org by "Clement Escoffier (JIRA)" <ji...@apache.org> on 2013/02/04 13:36:30 UTC
[jira] [Closed] (FELIX-3839) iPOJO deadlocks on a bundle refresh
[ https://issues.apache.org/jira/browse/FELIX-3839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Clement Escoffier closed FELIX-3839.
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> iPOJO deadlocks on a bundle refresh
> -----------------------------------
>
> Key: FELIX-3839
> URL: https://issues.apache.org/jira/browse/FELIX-3839
> Project: Felix
> Issue Type: Bug
> Components: iPOJO
> Affects Versions: ipojo-core-1.8.4, ipojo-runtime-1.8.6
> Reporter: Jad Naous
> Assignee: Clement Escoffier
> Fix For: ipojo-runtime-1.8.6
>
>
> iPOJO grabs a number of locks during synchronous callbacks from the framework, some in InstanceCreator and some in IPojoFactory. This can cause a repeatable deadlock situation during service registration (which attempts to grab the global felix framework lock, fixed in FELIX-3761) or during class resolution (still a problem). iPOJO should not be grabbing any locks during callbacks from the framework because those callbacks may be holding framework locks, and if another thread invokes the framework while holding the same lock, a deadlock will result. Below are stack traces two deadlock situations.
> Here's the stack trace that causes the deadlock in the first situation, which happens before FELIX-3761, but really shouldn't happen with or without that fix:
> Daemon Thread [Thread-1] (Suspended)
> Object.wait(long) line: not available [native method]
> Object[](Object).wait() line: 485
> Felix.acquireBundleLock(BundleImpl, int) line: 4871
> Felix.registerService(BundleImpl, String[], Object, Dictionary) line: 3205
> BundleContextImpl.registerService(String[], Object, Dictionary) line: 346
> IPojoContext.registerService(String[], Object, Dictionary) line: 385
> ProvidedService.registerService() line: 362
> ProvidedServiceHandler.__M_stateChanged(int) line: 509
> ProvidedServiceHandler.stateChanged(int) line: not available
> InstanceManager.setState(int) line: 536
> InstanceManager.start() line: 418
> ComponentFactory.createInstance(Dictionary, IPojoContext, HandlerManager[]) line: 179
> ComponentFactory(IPojoFactory).createComponentInstance(Dictionary, ServiceContext) line: 310
> ComponentFactory(IPojoFactory).createComponentInstance(Dictionary) line: 239
> InstanceCreator$ManagedInstance.create(IPojoFactory) line: 355
> InstanceCreator.addInstance(Dictionary, long) line: 89
> Extender.parse(Bundle, String) line: 306
> Extender.startManagementFor(Bundle) line: 237
> Extender.access$600(Extender, Bundle) line: 52
> Extender$CreatorThread.run() line: 769
> Thread.run() line: 662
> Daemon Thread [FelixFrameworkWiring] (Suspended)
> InstanceCreator.removeInstancesFromBundle(long) line: 116
> Extender.closeManagementFor(Bundle) line: 171
> Extender.bundleChanged(BundleEvent) line: 153
> EventDispatcher.invokeBundleListenerCallback(Bundle, EventListener, EventObject) line: 868
> EventDispatcher.fireEventImmediately(EventDispatcher, int, Map, EventObject, Dictionary) line: 789
> EventDispatcher.fireBundleEvent(BundleEvent, Framework) line: 514
> Felix.fireBundleEvent(int, Bundle) line: 4244
> Felix.stopBundle(BundleImpl, boolean) line: 2351
> Felix$RefreshHelper.stop() line: 4629
> Felix.refreshPackages(Collection, FrameworkListener[]) line: 3951
> FrameworkWiringImpl.run() line: 172
> Thread.run() line: 662
> Here's the stack trace for the other situation caused by class resolution in the framework:
> Name: Thread-2
> State: WAITING on [Ljava.lang.Object;@4a018e1b
> Total blocked: 38,871,649 Total waited: 38,871,650
> Stack trace:
> java.lang.Object.wait(Native Method)
> java.lang.Object.wait(Object.java:485)
> org.apache.felix.framework.Felix.acquireGlobalLock(Felix.java:5033)
> org.apache.felix.framework.StatefulResolver.resolve(StatefulResolver.java:451)
> org.apache.felix.framework.BundleWiringImpl.searchDynamicImports(BundleWiringImpl.java:1578)
> org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1478)
> org.apache.felix.framework.BundleWiringImpl.access$400(BundleWiringImpl.java:75)
> org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1882)
> java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> org.apache.felix.framework.BundleWiringImpl.getClassByDelegation(BundleWiringImpl.java:1356)
> org.apache.felix.framework.ServiceRegistrationImpl$ServiceReferenceImpl.isAssignableTo(ServiceRegistrationImpl.java:548)
> org.apache.felix.framework.util.Util.isServiceAssignable(Util.java:280)
> org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:916)
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:793)
> org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:543)
> org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4346)
> org.apache.felix.framework.Felix.registerService(Felix.java:3356)
> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
> org.apache.felix.ipojo.IPojoFactory.start(IPojoFactory.java:613)
> - locked org.apache.felix.ipojo.ComponentFactory@468034b6
> org.apache.felix.ipojo.Extender.createAbstractFactory(Extender.java:520)
> org.apache.felix.ipojo.Extender.parse(Extender.java:301)
> org.apache.felix.ipojo.Extender.startManagementFor(Extender.java:237)
> org.apache.felix.ipojo.Extender.access$600(Extender.java:52)
> org.apache.felix.ipojo.Extender$CreatorThread.run(Extender.java:769)
> java.lang.Thread.run(Thread.java:662)
> Name: FelixFrameworkWiring
> State: BLOCKED on org.apache.felix.ipojo.ComponentFactory@468034b6 owned by: Thread-2
> Total blocked: 7 Total waited: 1
> Stack trace:
> org.apache.felix.ipojo.IPojoFactory.removeFactoryStateListener(IPojoFactory.java:511)
> org.apache.felix.ipojo.InstanceCreator.removeFactory(InstanceCreator.java:199)
> org.apache.felix.ipojo.Extender.closeManagementFor(Extender.java:180)
> org.apache.felix.ipojo.Extender.bundleChanged(Extender.java:153)
> org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:868)
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:789)
> org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:514)
> org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4330)
> org.apache.felix.framework.Felix.stopBundle(Felix.java:2451)
> org.apache.felix.framework.Felix$RefreshHelper.stop(Felix.java:4715)
> org.apache.felix.framework.Felix.refreshPackages(Felix.java:4037)
> org.apache.felix.framework.FrameworkWiringImpl.run(FrameworkWiringImpl.java:178)
> java.lang.Thread.run(Thread.java:662)
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