On Tue, Jan 1, 2013 at 9:58 AM, Richard S. Hall <he...@ungoverned.org>wrote:
> On 1/1/13 12:40, Jad Naous wrote: > >> On Tue, Jan 1, 2013 at 9:16 AM, Richard S. Hall <he...@ungoverned.org >> >wrote: >> >> On 1/1/13 11:51, Jad Naous wrote: >>> >>> On Tue, Jan 1, 2013 at 8:30 AM, Richard S. Hall <he...@ungoverned.org >>>> >>>>> wrote: >>>>> >>>> On 1/1/13 11:13, Jad Naous wrote: >>>> >>>>> On Tue, Jan 1, 2013 at 7:58 AM, Richard S. Hall < >>>>> he...@ungoverned.org >>>>> >>>>>> wrote: >>>>>>> >>>>>>> On 1/1/13 10:37, Jad Naous wrote: >>>>>> >>>>>> On Tue, Jan 1, 2013 at 6:21 AM, Richard S. Hall< >>>>>>> he...@ungoverned.org >>>>>>> >>>>>>>> ** >>>>>>>> wrote: >>>>>>>> >>>>>>>> On 1/1/13 06:09, Jad Naous wrote: >>>>>>>> >>>>>>>> Happy new year! >>>>>>>> >>>>>>>>> I'm running into another deadlock now. It seems like there needs >>>>>>>>> to >>>>>>>>> >>>>>>>>>> be a >>>>>>>>>> more rigorous study of how locking is used in the framework. In >>>>>>>>>> particular, >>>>>>>>>> it seems like the framework should not be invoking any listeners >>>>>>>>>> within >>>>>>>>>> the >>>>>>>>>> same thread that's executing the stopping/starting/refreshing of >>>>>>>>>> bundles... >>>>>>>>>> Anywhere that happens there will be a potential for a deadlock >>>>>>>>>> because >>>>>>>>>> of >>>>>>>>>> a >>>>>>>>>> misordering of lock acquisition. The framework should never call >>>>>>>>>> into >>>>>>>>>> user >>>>>>>>>> code with any locks held. >>>>>>>>>> >>>>>>>>>> Yeah, tell me about it, but it is not possible in all cases, >>>>>>>>>> >>>>>>>>>> unfortunately. I personally feel that all events should be >>>>>>>>>> >>>>>>>>> asynchronous, >>>>>>>>> but that's another story. >>>>>>>>> >>>>>>>>> -> richard >>>>>>>>> >>>>>>>>> >>>>>>>>> I'm happy to help fix this, but I need some pointers as to what >>>>>>>>> needs to >>>>>>>>> >>>>>>>>> happen. For synchronous events, what are the requirements? Or is >>>>>>>>> >>>>>>>> this >>>>>>>> not >>>>>>>> fixable? Can the lock be released before firing the events? >>>>>>>> >>>>>>>> I don't think it can be fixed, some of these things are baked >>>>>>>> into >>>>>>>> the >>>>>>>> >>>>>>>> spec. I think the spec even states somewhere that synchronous event >>>>>>> listeners must be careful since they may be holding framework locks, >>>>>>> so >>>>>>> they shouldn't try to do too much. Of course, that is not easy advice >>>>>>> to >>>>>>> follow since framework impls vary. >>>>>>> >>>>>>> We even have bugs open that say we aren't holding locks when we >>>>>>> should >>>>>>> be, >>>>>>> e.g.: >>>>>>> >>>>>>> >>>>>>> https://issues.apache.org/********jira/browse/FELIX-3806<https://issues.apache.org/******jira/browse/FELIX-3806> >>>>>>> <https**://issues.apache.org/****jira/**browse/FELIX-3806<https://issues.apache.org/****jira/browse/FELIX-3806> >>>>>>> > >>>>>>> <https:/**/issues.apache.org/****jira/**browse/FELIX-3806<http://issues.apache.org/**jira/**browse/FELIX-3806> >>>>>>> <http**s://issues.apache.org/**jira/**browse/FELIX-3806<https://issues.apache.org/**jira/browse/FELIX-3806> >>>>>>> > >>>>>>> <https:/**/issues.apache.org/****jira/**browse/FELIX-3806<http://issues.apache.org/**jira/**browse/FELIX-3806> >>>>>>> <http**://issues.apache.org/jira/****browse/FELIX-3806<http://issues.apache.org/jira/**browse/FELIX-3806> >>>>>>> > >>>>>>> <https**://issues.apache.org/**jira/**browse/FELIX-3806<http://issues.apache.org/jira/**browse/FELIX-3806> >>>>>>> <https**://issues.apache.org/jira/**browse/FELIX-3806<https://issues.apache.org/jira/browse/FELIX-3806> >>>>>>> > >>>>>>> >>>>>>> >>>>>>> This is one of the poorly designed parts of the OSGi spec. It was >>>>>>> meant >>>>>>> to >>>>>>> work in a world were services can "come and go at anytime", but it >>>>>>> allows >>>>>>> users to clings to synchronous events to do tons of work. >>>>>>> >>>>>>> Then I guess this is something that ipojo is doing incorrectly? >>>>>>> >>>>>>> Hard for me to say, but if there is a case where we can fire events >>>>>> >>>>> without holding locks, then you are correct in saying that we should >>>>> try >>>>> to >>>>> avoid doing so. Likewise, users should avoid doing too much when they >>>>> receive synchronous events. >>>>> >>>>> Well, iPOJO is not doing anything. It is just loading a class, and >>>>> >>>> that's >>>> what's causing the global lock to be acquired. >>>> >>>> You're really going to make me look into this, aren't you? ;-) >>> >>> >>> :) Thanks from me and the tons of other people using this framework! >> >> >> I'm not sure what is going on, but for whatever reason you are in the >>> middle of a refresh (which requires global lock) while it appears that >>> iPOJO is starting to manage a new bundle, which ultimately results in >>> someone trying to do a dynamic import (which also requires global lock). >>> >>> There isn't much we can do in this case other than try to detect it and >>> fail for the global lock acquire... >>> >>> And ipojo will have to deal... Seems simpler if ipojo didn't try to >> unregister services or do that sort of thing (or at least not acquire any >> locks of its own) synchronously. >> > > iPOJO doesn't appear to be doing anything synchronously here. It looks > like it is working on another thread to start management of a perhaps newly > installed or updated bundle. The issue actually arises because the > framework instigates a dynamic import when trying to determine if it should > deliver the event to a service listener (it needs to try to load classes in > some cases to see if the service's class is compatible with the listener's > service class). > > This is really ugly. Not really sure what we could do here other than > always fail service event delivery if the listener bundle doesn't already > have access to the service class. But that would still be complicated to do > and would lead to other failure scenarios. > > I'd have to think about that one. > > That's in one thread. In the other, the framework calls stopBundle() and ipojo is reacting to that be calling InstanceCreator.removeFactory(), and this is the guy that grabs the other lock. If ipojo instead either doesn't grab the lock or pushes the work somewhere else, this ugly mess goes away... > -> richard > > >> >> -> richard >>> >>> >>> -> richard >>>> >>>>> >>>>> -> richard >>>>> >>>>>> 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.** >>>>>>>>>> findClassOrResourceByDelegatio**********n(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@468034b6owned >>>>>>>>>> >>>>>>>>>> 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) >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Sat, Dec 22, 2012 at 6:39 PM, Richard S. Hall < >>>>>>>>>> he...@ungoverned.org >>>>>>>>>> >>>>>>>>>> wrote: >>>>>>>>>> >>>>>>>>>> On 12/22/12 20:41 , Jad Naous wrote: >>>>>>>>>>> >>>>>>>>>>> Thanks! I was building with java6. Don't know if that is >>>>>>>>>> the >>>>>>>>>> >>>>>>>>>> issue. >>>>>>>>>>> >>>>>>>>>>> Anyway, >>>>>>>>>>> >>>>>>>>>>> I tested the snapshot, and looks like that fixes it. >>>>>>>>>>>> >>>>>>>>>>>> Any idea when 4.1.0 will be released? Do you know if >>>>>>>>>>>> http://svn.apache.org/viewvc?************view=revision&** >>>>>>>>>>>> revision=**<http://svn.apache.org/viewvc?**********view=revision&revision=**> >>>>>>>>>>>> ****<http://svn.apache.org/**viewvc?********view=revision&** >>>>>>>>>>>> revision=****<http://svn.apache.org/viewvc?********view=revision&revision=****> >>>>>>>>>>>> > >>>>>>>>>>>> **1421958<http://svn.apache.****org/viewvc?******view=** >>>>>>>>>>>> revision&revision=****1421958<**http://svn.apache.org/viewvc?** >>>>>>>>>>>> ******view=revision&revision=******1421958<http://svn.apache.org/viewvc?******view=revision&revision=****1421958> >>>>>>>>>>>> > >>>>>>>>>>>> <http://svn.apache.**org/****viewvc?****view=revision&** >>>>>>>>>>>> revision=**1421958<http://svn.****apache.org/viewvc?****view=** >>>>>>>>>>>> ** <http://apache.org/viewvc?****view=**> >>>>>>>>>>>> revision&revision=**1421958<ht**tp://svn.apache.org/viewvc?**** >>>>>>>>>>>> **view=revision&revision=****1421958<http://svn.apache.org/viewvc?****view=revision&revision=**1421958> >>>>>>>>>>>> > >>>>>>>>>>>> <http://svn.apache.org/********viewvc?**view=revision&****<http://svn.apache.org/******viewvc?**view=revision&****> >>>>>>>>>>>> <ht**tp://svn.apache.org/******viewvc?**view=revision&****<http://svn.apache.org/****viewvc?**view=revision&****> >>>>>>>>>>>> > >>>>>>>>>>>> revision=1421958<http://svn.****apache.org/**viewvc?**view=**<http://apache.org/**viewvc?**view=**> >>>>>>>>>>>> revision&**revision=1421958<ht**tp://svn.apache.org/**viewvc?** >>>>>>>>>>>> **view=revision&**revision=**1421958<http://svn.apache.org/**viewvc?**view=revision&**revision=1421958> >>>>>>>>>>>> > >>>>>>>>>>>> <http://svn.**apache.org/****viewvc?**view=**revision&**<http://apache.org/**viewvc?**view=**revision&**> >>>>>>>>>>>> revision=1421958<http://**apache.org/viewvc?**view=**** >>>>>>>>>>>> revision&revision=1421958<http://apache.org/viewvc?**view=**revision&revision=1421958> >>>>>>>>>>>> > >>>>>>>>>>>> <http://svn.**apache.org/**viewvc?**view=**<http://apache.org/viewvc?**view=**> >>>>>>>>>>>> revision&revision=1421958<http**://svn.apache.org/viewvc?**** >>>>>>>>>>>> view=revision&revision=1421958<http://svn.apache.org/viewvc?**view=revision&revision=1421958> >>>>>>>>>>>> **> >>>>>>>>>>>> <http://svn.apache.org/**********viewvc?view=revision&** >>>>>>>>>>>> revision=****<http://svn.apache.org/********viewvc?view=revision&revision=****> >>>>>>>>>>>> <http://svn.**apache.org/******viewvc?view=** >>>>>>>>>>>> revision&revision=**<http://svn.apache.org/******viewvc?view=revision&revision=**> >>>>>>>>>>>> > >>>>>>>>>>>> ****1421958<http://svn.apache.****org/****viewvc?view=** >>>>>>>>>>>> revision&** >>>>>>>>>>>> revision=****1421958<http://**svn.apache.org/****viewvc?** >>>>>>>>>>>> view=revision&revision=******1421958<http://svn.apache.org/****viewvc?view=revision&revision=****1421958> >>>>>>>>>>>> > >>>>>>>>>>>> <http://svn.apache.**org/******viewvc?view=revision&** >>>>>>>>>>>> revision=**1421958<http://svn.****apache.org/**viewvc?view=** >>>>>>>>>>>> revision&revision=**1421958<ht**tp://svn.apache.org/**viewvc?** >>>>>>>>>>>> view=revision&revision=****1421958<http://svn.apache.org/**viewvc?view=revision&revision=**1421958> >>>>>>>>>>>> > >>>>>>>>>>>> <http://svn.apache.**org/******viewvc?view=revision&**** >>>>>>>>>>>> revision=1421958<http://svn.******apache.org/viewvc?view=**<ht* >>>>>>>>>>>> *tp://apache.org/viewvc?view=**<http://apache.org/viewvc?view=**> >>>>>>>>>>>> **> >>>>>>>>>>>> revision&revision=1421958<**http**://svn.apache.org/** >>>>>>>>>>>> viewvc?view=** <http://svn.apache.org/viewvc?view=**> >>>>>>>>>>>> >>>>>>>>>>>> revision&revision=1421958<http**://svn.apache.org/viewvc?view=* >>>>>>>>>>>> *revision&revision=1421958<http://svn.apache.org/viewvc?view=revision&revision=1421958> >>>>>>>>>>>> > >>>>>>>>>>>> will >>>>>>>>>>>> >>>>>>>>>>>> apply >>>>>>>>>>>>> >>>>>>>>>>>>> cleanly onto 4.0.3? Otherwise, how stable do you think is >>>>>>>>>>>> 4.1.0-SNAPSHOT? >>>>>>>>>>>> >>>>>>>>>>>> The release version will be 4.2.0, but the 4.1.0-SNAPSHOT >>>>>>>>>>>> build >>>>>>>>>>>> should >>>>>>>>>>>> >>>>>>>>>>>> be >>>>>>>>>>>> >>>>>>>>>>>> reasonably stable. We try to keep trunk stable. >>>>>>>>>>> >>>>>>>>>>> I want to try to get a release out soon, but I don't have a >>>>>>>>>>> specific >>>>>>>>>>> time >>>>>>>>>>> table. I'll try to get in done in January if all goes well. >>>>>>>>>>> >>>>>>>>>>> -> richard >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> Thanks! >>>>>>>>>>> >>>>>>>>>>> Jad. >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>>> On Fri, Dec 21, 2012 at 6:49 AM, Richard S. Hall < >>>>>>>>>>>> he...@ungoverned.org >>>>>>>>>>>> >>>>>>>>>>>> wrote: >>>>>>>>>>>> >>>>>>>>>>>> It built fine for me. I'm was building with Java 7. >>>>>>>>>>>> >>>>>>>>>>>>> Regardless, I deployed snapshots of framework, main, and >>>>>>>>>>>>> >>>>>>>>>>>> main.distribution, so just grab what you want from the Apache >>>>>>>>>>>> >>>>>>>>>>>>> snapshot >>>>>>>>>>>>> repo >>>>>>>>>>>>> to try it out. >>>>>>>>>>>>> >>>>>>>>>>>>> -> richard >>>>>>>>>>>>> >>>>>>>>>>>>> >>>>>>>>>>>>> On 12/20/12 18:56 , Jad Naous wrote: >>>>>>>>>>>>> >>>>>>>>>>>>> It does look like the same issue. >>>>>>>>>>>>> >>>>>>>>>>>>> Got the trunk/framework. mvn clean install gives: >>>>>>>>>>>>> >>>>>>>>>>>>> [INFO] --- maven-compiler-plugin:2.3.2:**************compile >>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> (default-compile) @ >>>>>>>>>>>>>> org.apache.felix.framework --- >>>>>>>>>>>>>> Dec 20, 2012 3:54:59 PM org.sonatype.guice.bean.**** >>>>>>>>>>>>>> reflect.Logs$JULSink >>>>>>>>>>>>>> warn >>>>>>>>>>>>>> WARNING: Error injecting: org.apache.maven.plugin.******** >>>>>>>>>>>>>> ****** >>>>>>>>>>>>>> CompilerMojo >>>>>>>>>>>>>> java.lang.**************NoClassDefFoundError: >>>>>>>>>>>>>> org/codehaus/plexus/compiler/**************util/scan/****** >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> InclusionScanException >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> Thanks, >>>>>>>>>>>>>> jad. >>>>>>>>>>>>>> >>>>>>>>>>>>>> >>>>>>>>>>>>>> On Thu, Dec 20, 2012 at 3:22 PM, Richard S. Hall < >>>>>>>>>>>>>> he...@ungoverned.org >>>>>>>>>>>>>> >>>>>>>>>>>>>> wrote: >>>>>>>>>>>>>> >>>>>>>>>>>>>> On 12/20/12 4:10 PM, Jad Naous wrote: >>>>>>>>>>>>>> >>>>>>>>>>>>>> If a bundle undergoes a refresh while ipojo is still >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> initializing >>>>>>>>>>>>>> >>>>>>>>>>>>>> components, a deadlock can happen. The issue is that if >>>>>>>>>>>>>> >>>>>>>>>>>>>> ipojo is >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> attempting to register a service, it will be doing it >>>>>>>>>>>>>>> while >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> synchronizing >>>>>>>>>>>>>>>> on the InstanceCreator instance. It will then try to >>>>>>>>>>>>>>>> register >>>>>>>>>>>>>>>> a >>>>>>>>>>>>>>>> service >>>>>>>>>>>>>>>> which requires the framework's global lock. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> Registering a service doesn't require a global, just >>>>>>>>>>>>>>>> a >>>>>>>>>>>>>>>> bundle >>>>>>>>>>>>>>>> lock. >>>>>>>>>>>>>>>> I >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> think this could be related to: >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> https://issues.apache.org/**********<https://issues.apache.org/********> >>>>>>>>>>>>>>>> <https://issues.apache.**org/******<https://issues.apache.org/******> >>>>>>>>>>>>>>>> > >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> ******jira/browse/FELIX-3761<**h**ttps:// >>>>>>>>>>>>>>> issues.apache.org/******* <http://issues.apache.org/*****> >>>>>>>>>>>>>>> *******jira/browse/FELIX-3761<** >>>>>>>>>>>>>>> https://issues.apache.org/************jira/browse/FELIX-3761<https://issues.apache.org/**********jira/browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <h**ttps://issues.apache.org/*** >>>>>>>>>>>>>>> ***********jira/browse/FELIX-****<http://issues.apache.org/************jira/browse/FELIX-**> >>>>>>>>>>>>>>> 3761<http://issues.apache.org/************jira/browse/FELIX- >>>>>>>>>>>>>>> **3761<http://issues.apache.org/**********jira/browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <https://issues.apache.**org/**********jira/browse/FELIX-*** >>>>>>>>>>>>>>> *3761<https://issues.apache.**org/********jira/browse/FELIX- >>>>>>>>>>>>>>> **3761<https://issues.apache.org/********jira/browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <htt**ps://issues.apache.org/*** >>>>>>>>>>>>>>> ***********jira/browse/FELIX-****<http://issues.apache.org/************jira/browse/FELIX-**> >>>>>>>>>>>>>>> 3761<http://issues.apache.org/************jira/browse/FELIX- >>>>>>>>>>>>>>> **3761<http://issues.apache.org/**********jira/browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> 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>>>>>>>>>>>>>>> <http**s://issues.apache.org/**********jira/**browse/FELIX-* >>>>>>>>>>>>>>> *3761<http://issues.apache.org/********jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> <http://issues.apache.org/********jira/**browse/FELIX-3761<http://issues.apache.org/******jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> **> >>>>>>>>>>>>>>> <**http://issues.apache.org/********jira/**browse/FELIX-3761<http://issues.apache.org/******jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> <h**ttp://issues.apache.org/******jira/**browse/FELIX-3761<http://issues.apache.org/****jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> <ht**tp://issues.apache.org/******jira/****browse/FELIX-3761<http://issues.apache.org/****jira/****browse/FELIX-3761> >>>>>>>>>>>>>>> <h**ttp://issues.apache.org/****jira/****browse/FELIX-3761<http://issues.apache.org/**jira/****browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> 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<htt**p://issues.apache.org/**jira/****browse/FELIX-3761<http://issues.apache.org/**jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <http**://issues.apache.org/****jira/****browse/FELIX-3761<http://issues.apache.org/**jira/****browse/FELIX-3761> >>>>>>>>>>>>>>> <htt**p://issues.apache.org/jira/******browse/FELIX-3761<http://issues.apache.org/jira/****browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <htt**p://issues.apache.org/**jira/****browse/FELIX-3761<http://issues.apache.org/jira/****browse/FELIX-3761> >>>>>>>>>>>>>>> <htt**p://issues.apache.org/jira/****browse/FELIX-3761<http://issues.apache.org/jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <https**://issues.apache.org/******jira/**browse/FELIX-3761<http://issues.apache.org/****jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> <ht**tp://issues.apache.org/**jira/****browse/FELIX-3761<http://issues.apache.org/**jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <http**://issues.apache.org/**jira/****browse/FELIX-3761<http://issues.apache.org/jira/****browse/FELIX-3761> >>>>>>>>>>>>>>> <htt**p://issues.apache.org/jira/****browse/FELIX-3761<http://issues.apache.org/jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <https**://issues.apache.org/****jira/**browse/FELIX-3761<http://issues.apache.org/**jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> <http**://issues.apache.org/jira/****browse/FELIX-3761<http://issues.apache.org/jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> <https**://issues.apache.org/**jira/**browse/FELIX-3761<http://issues.apache.org/jira/**browse/FELIX-3761> >>>>>>>>>>>>>>> <https**://issues.apache.org/jira/**browse/FELIX-3761<https://issues.apache.org/jira/browse/FELIX-3761> >>>>>>>>>>>>>>> > >>>>>>>>>>>>>>> This avoid grabbing the bundle lock when registering a >>>>>>>>>>>>>>> service, >>>>>>>>>>>>>>> so >>>>>>>>>>>>>>> maybe >>>>>>>>>>>>>>> it will help your situation. You could try to build the >>>>>>>>>>>>>>> framework >>>>>>>>>>>>>>> from >>>>>>>>>>>>>>> trunk and see if it makes a difference. >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> If you aren't able to build from trunk, let me know and I'll >>>>>>>>>>>>>>> try >>>>>>>>>>>>>>> to >>>>>>>>>>>>>>> publish a snapshot build since I don't think we have a recent >>>>>>>>>>>>>>> one >>>>>>>>>>>>>>> (we >>>>>>>>>>>>>>> should do this no matter what). >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> -> richard >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> If a refresh is happening in another thread, the >>>>>>>>>>>>>>> refresh >>>>>>>>>>>>>>> will >>>>>>>>>>>>>>> be >>>>>>>>>>>>>>> holding >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> the framework's global lock, which will then call >>>>>>>>>>>>>>> IPOJO's >>>>>>>>>>>>>>> extender, >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> which >>>>>>>>>>>>>>> >>>>>>>>>>>>>>> then attempts to call a method on InstanceCreator, hence >>>>>>>>>>>>>>>> leading >>>>>>>>>>>>>>>> to >>>>>>>>>>>>>>>> the >>>>>>>>>>>>>>>> deadlock. >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> Here are the stack traces: >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> 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 >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>> >
