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From "David Bosschaert (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FELIX-4670) Deadlock in Felix HTTP service
Date Wed, 15 Oct 2014 19:38:34 GMT

    [ https://issues.apache.org/jira/browse/FELIX-4670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14172832#comment-14172832
] 

David Bosschaert commented on FELIX-4670:
-----------------------------------------

I thought a little more about doing a get() call before doing the init() but I think there
is an issue with that. Basically there is a window of opportunity where a servlet is removed
between that get() call and the putIfAbsent() which means that a servlet/filter may not get
added even though the alias/servlet (or filter) isn't there.

Therefore I think it might be better to not do the additional get() and simply do the atomic
putIfAbsent(). I'll put some code in that makes sure that init() doesn't get called multiple
times without destroy in between.

> Deadlock in Felix HTTP service
> ------------------------------
>
>                 Key: FELIX-4670
>                 URL: https://issues.apache.org/jira/browse/FELIX-4670
>             Project: Felix
>          Issue Type: Bug
>          Components: HTTP Service
>    Affects Versions: http-2.2.0
>         Environment: Websphere 7.0, IBM Java 6.0
>            Reporter: Jörg Hoh
>            Assignee: David Bosschaert
>         Attachments: felix-4670.diff, felix_4670_alt.diff
>
>
> When we startup our webapplication, we sometimes run into a deadlock:
> {code}
> 1LKDEADLOCK    Deadlock detected !!!
> NULL           ---------------------
> NULL           
> 2LKDEADLOCKTHR  Thread "server.startup : 1" (0x0000000001DDC800)
> 3LKDEADLOCKWTR    is waiting for:
> 4LKDEADLOCKMON      sys_mon_t:0x00007FFFBBB61F20 infl_mon_t: 0x00007FFFBBB61F90:
> 4LKDEADLOCKOBJ      org/apache/felix/http/whiteboard/internal/manager/ExtenderManager@0x00000001014B3650/0x00000001014B365C:

> 3LKDEADLOCKOWN    which is owned by:
> 2LKDEADLOCKTHR  Thread "FelixStartLevel" (0x0000000002156100)
> 3LKDEADLOCKWTR    which is waiting for:
> 4LKDEADLOCKMON      sys_mon_t:0x00007FFFBBBBA340 infl_mon_t: 0x00007FFFBBBBA3B0:
> 4LKDEADLOCKOBJ      org/apache/felix/http/base/internal/handler/HandlerRegistry@0x00000001070D6EA0/0x00000001070D6EAC:

> 3LKDEADLOCKOWN    which is owned by:
> 2LKDEADLOCKTHR  Thread "server.startup : 1" (0x0000000001DDC800)
> NULL         
> {code}
> The stacktrace of these 2 threads as indicated by the javacore file:
> {code}
> 3XMTHREADINFO      "FelixStartLevel" J9VMThread:0x0000000002156100, j9thread_t:0x00007FFFC938B4B0,
java/lang/Thread:0x0000000101580260, state:B, prio=5
> 3XMJAVALTHREAD            (java/lang/Thread getId:0x70, isDaemon:true)
> 3XMTHREADINFO1            (native thread ID:0x5D3A, native priority:0x5, native policy:UNKNOWN)
> 3XMTHREADINFO2            (native stack address range from:0x00007FFFC530A000, to:0x00007FFFC534B000,
size:0x41000)
> 3XMTHREADINFO3           Java callstack:
> 4XESTACKTRACE                at org/apache/felix/http/base/internal/service/HttpServiceImpl.unregisterFilter(HttpServiceImpl.java:140)
   
> 4XESTACKTRACE                at org/apache/felix/http/base/internal/service/HttpServiceImpl.unregisterFilter(HttpServiceImpl.java:76)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/manager/FilterMapping.unregister(FilterMapping.java:90)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/manager/FilterMapping.unregister(FilterMapping.java:83)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/manager/ExtenderManager.unregisterMapping(ExtenderManager.java:270)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/manager/ExtenderManager.removeMapping(ExtenderManager.java:252)
     
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/manager/ExtenderManager.remove(ExtenderManager.java:183)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/tracker/FilterTracker.removed(FilterTracker.java:48)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/tracker/FilterTracker.removed(FilterTracker.java:24)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/tracker/AbstractTracker.removedService(AbstractTracker.java:52)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerRemoved(ServiceTracker.java:956)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerRemoved(ServiceTracker.java:864)
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.untrack(AbstractTracked.java:341(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:902(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireEventImmediately(EventDispatcher.java:793(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireServiceEvent(EventDispatcher.java:543(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.fireServiceEvent(Felix.java:4401(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.access$000(Felix.java:74(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix$1.serviceChanged(Felix.java:390(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/ServiceRegistry.unregisterService(ServiceRegistry.java:151(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/ServiceRegistrationImpl.unregister(ServiceRegistrationImpl.java:127(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/scr/impl/manager/AbstractComponentManager.unregisterComponentService(AbstractComponentManager.java:702(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/scr/impl/manager/AbstractComponentManager$State.doDeactivate(AbstractComponentManager.java:1301(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/scr/impl/manager/AbstractComponentManager$Satisfied.dispose(AbstractComponentManager.java:1617)
> 4XESTACKTRACE                at org/apache/felix/scr/impl/manager/AbstractComponentManager.disposeInternal(AbstractComponentManager.java:574(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/scr/impl/manager/AbstractComponentManager.dispose(AbstractComponentManager.java:404(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/scr/impl/config/ImmediateComponentHolder.disposeComponents(ImmediateComponentHolder.java:371(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/scr/impl/BundleComponentActivator.dispose(BundleComponentActivator.java:320(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/scr/impl/Activator.disposeComponents(Activator.java:316)
> 4XESTACKTRACE                at org/apache/felix/scr/impl/Activator.bundleChanged(Activator.java:183(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:868(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireEventImmediately(EventDispatcher.java:789(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireBundleEvent(EventDispatcher.java:514(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.fireBundleEvent(Felix.java:4385(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.stopBundle(Felix.java:2508)
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.setActiveStartLevel(Felix.java:1297(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)
> 4XESTACKTRACE                at java/lang/Thread.run(Thread.java:761)
> {code}
> {code}
> 3XMTHREADINFO      "server.startup : 1" J9VMThread:0x0000000001DDC800, j9thread_t:0x00007FFFC8C61340,
java/lang/Thread:0x00000001014B35A8, state:B, prio=5
> 3XMJAVALTHREAD            (java/lang/Thread getId:0x68, isDaemon:true)
> 3XMTHREADINFO1            (native thread ID:0x5A08, native priority:0x5, native policy:UNKNOWN)
> 3XMTHREADINFO2            (native stack address range from:0x00007FFFC64D4000, to:0x00007FFFC6515000,
size:0x41000)
> 3XMTHREADINFO3           Java callstack:
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/manager/ExtenderManager.remove(ExtenderManager.java:183)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/tracker/ServletTracker.removed(ServletTracker.java:48)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/tracker/ServletTracker.removed(ServletTracker.java:24)
> 4XESTACKTRACE                at org/apache/felix/http/whiteboard/internal/tracker/AbstractTracker.removedService(AbstractTracker.java:52)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerRemoved(ServiceTracker.java:956)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerRemoved(ServiceTracker.java:864)
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.untrack(AbstractTracked.java:341(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:902(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.invokeServiceLi
stenerCallback(EventDispatcher.java:932(Compiled Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireEventImmediately(EventDispatcher.java:793(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireServiceEvent(EventDispatcher.java:543(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.fireServiceEvent(Felix.java:4401(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.access$000(Felix.java:74(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix$1.serviceChanged(Felix.java:390(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/ServiceRegistry.unregisterService(ServiceRegistry.java:151(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/ServiceRegistrationImpl.unregister(ServiceRegistrationImpl.java:127(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/inventory/impl/InventoryPrinterAdapter.unregisterConsole(InventoryPrinterAdapter.java:84)
> 4XESTACKTRACE                at org/apache/felix/inventory/impl/InventoryPrinterManagerImpl.addService(InventoryPrinterManagerImpl.java:196)
> 4XESTACKTRACE                at org/apache/felix/inventory/impl/InventoryPrinterManagerImpl.addingService(InventoryPrinterManagerImpl.java:128)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:932(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:864(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.trackAdding(AbstractTracked.java:256(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.track(AbstractTracked.java:229(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:894(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireEventImmediately(EventDispatcher.java:793(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireServiceEvent(EventDispatcher.java:543(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.fireServiceEvent(Felix.java:4401(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.registerService(Felix.java:3411(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/BundleContextImpl.registerService(BundleContextImpl.java:346(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/BundleContextImpl.registerService(BundleContextImpl.java:320)
> 4XESTACKTRACE                at org/apache/felix/inventory/impl/webconsole/WebConsoleAdapter.add(WebConsoleAdapter.java:125)
> 4XESTACKTRACE                at org/apache/felix/inventory/impl/webconsole/WebConsoleAdapter.addingService(WebConsoleAdapter.java:155)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:932(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:864(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.trackAdding(AbstractTracked.java:256(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.track(AbstractTracked.java:229(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:894(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireEventImmediately(EventDispatcher.java:793(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireServiceEvent(EventDispatcher.java:543(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.fireServiceEvent(Felix.java:4401(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.registerService(Felix.java:3411(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/BundleContextImpl.registerService(BundleContextImpl.java:346(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/BundleContextImpl.registerService(BundleContextImpl.java:320)
> 4XESTACKTRACE                at de/xxx/yyy/modules/common/servlet/dispatcher/jsp/JspTldLocationsCache.<init>(JspTldLocationsCache.java:81)
> 4XESTACKTRACE                at de/xxx/yyy/modules/common/servlet/dispatcher/jsp/engine/JspScriptEngineFactory.activate(JspScriptEngineFactory.java:235)
> 4XESTACKTRACE                at de/xxx/yyy/modules/common/servlet/ContainerServlet.init(ContainerServlet.java:96)
> 4XESTACKTRACE                at org/apache/felix/http/base/internal/handler/ServletHandler.init(ServletHandler.java:55)
> 4XESTACKTRACE                at org/apache/felix/http/base/internal/handler/HandlerRegistry.addServlet(HandlerRegistry.java:65)
                    
> 4XESTACKTRACE                at org/apache/felix/http/base/internal/service/HttpServiceImpl.registerServlet(HttpServiceImpl.java:95)
> 4XESTACKTRACE                at de/xxx/yyy/modules/common/osgi/webapp/WebappModuleServiceTracker.addingService(WebappModuleServiceTracker.java:82)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:932(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:864(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.trackAdding(AbstractTracked.java:256(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.track(AbstractTracked.java:229(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:894(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireEventImmediately(EventDispatcher.java:793(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/util/EventDispatcher.fireServiceEvent(EventDispatcher.java:543(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.fireServiceEvent(Felix.java:4401(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/Felix.registerService(Felix.java:3411(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/framework/BundleContextImpl.registerService(BundleContextImpl.java:346(Compiled
Code))
> 4XESTACKTRACE                at org/apache/felix/http/base/internal/HttpServiceController.register(HttpServiceController.java:135)
> 4XESTACKTRACE                at org/apache/felix/http/base/internal/DispatcherServlet.init(DispatcherServlet.java:48)
> 4XESTACKTRACE                at org/apache/felix/http/proxy/DispatcherTracker.initDispatcher(DispatcherTracker.java:97)
> 4XESTACKTRACE                at org/apache/felix/http/proxy/DispatcherTracker.setDispatcher(DispatcherTracker.java:77)
> 4XESTACKTRACE                at org/apache/felix/http/proxy/DispatcherTracker.addingService(DispatcherTracker.java:52)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:932)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:864)
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.trackAdding(AbstractTracked.java:256(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/AbstractTracked.trackInitial(AbstractTracked.java:183(Compiled
Code))
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker.open(ServiceTracker.java:317)
> 4XESTACKTRACE                at org/osgi/util/tracker/ServiceTracker.open(ServiceTracker.java:261)
> 4XESTACKTRACE                at org/apache/felix/http/proxy/ProxyServlet.doInit(ProxyServlet.java:51)
> 4XESTACKTRACE                at org/apache/felix/http/proxy/ProxyServlet.init(ProxyServlet.java:39)
> 4XESTACKTRACE                at org/apache/sling/launchpad/base/webapp/SlingServletDelegate.init(SlingServletDelegate.java:208)
> 4XESTACKTRACE                at javax/servlet/GenericServlet.init(GenericServlet.java:241)
> 4XESTACKTRACE                at org/apache/sling/launchpad/webapp/SlingServlet.startSling(SlingServlet.java:384)
> 4XESTACKTRACE                at org/apache/sling/launchpad/webapp/SlingServlet.startSling(SlingServlet.java:325)
> 4XESTACKTRACE                at org/apache/sling/launchpad/webapp/SlingServlet.init(SlingServlet.java:118)
> 4XESTACKTRACE                at javax/servlet/GenericServlet.init(GenericServlet.java:241)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/servlet/ServletWrapper.init(ServletWrapper.java:363)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/servlet/ServletWrapperImpl.init(ServletWrapperImpl.java:171)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/servlet/ServletWrapper.initialize(ServletWrapper.java:1844)
> 4XESTACKTRACE                at com/ibm/wsspi/webcontainer/extension/WebExtensionProcessor.createServletWrapper(WebExtensionProcessor.java:98)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/webapp/WebApp.getServletWrapper(WebApp.java:1048(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/webapp/WebApp.getServletWrapper(WebApp.java:969)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/webapp/WebApp.initializeTargetMappings(WebApp.java:648(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/webapp/WebApp.commonInitializationFinally(WebApp.java:450)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/webapp/WebAppImpl.initialize(WebAppImpl.java:304(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/webapp/WebGroupImpl.addWebApplication(WebGroupImpl.java:100)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/VirtualHostImpl.addWebApplication(VirtualHostImpl.java:166)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/WSWebContainer.addWebApp(WSWebContainer.java:732)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/WSWebContainer.addWebApplication(WSWebContainer.java:617)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/component/WebContainerImpl.install(WebContainerImpl.java:376)
> 4XESTACKTRACE                at com/ibm/ws/webcontainer/component/WebContainerImpl.start(WebContainerImpl.java:668)
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/ApplicationMgrImpl.start(ApplicationMgrImpl.java:1128(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1319)
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/DeployedModuleImpl.start(DeployedModuleImpl.java:611(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/DeployedApplicationImpl.start(DeployedApplicationImpl.java:944(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:741(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/ApplicationMgrImpl$3.run(ApplicationMgrImpl.java:2056)
> 4XESTACKTRACE                at com/ibm/ws/security/auth/ContextManagerImpl.runAs(ContextManagerImpl.java:5395)
> 4XESTACKTRACE                at com/ibm/ws/security/auth/ContextManagerImpl.runAsSystem(ContextManagerImpl.java:5483)
> 4XESTACKTRACE                at com/ibm/ws/security/core/SecurityContext.runAsSystem(SecurityContext.java:255)
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/ApplicationMgrImpl.start(ApplicationMgrImpl.java:2061)
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:389(Compiled
Code))
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/CompositionUnitImpl.start(CompositionUnitImpl.java:123)
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:332)
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/CompositionUnitMgrImpl.access$300(CompositionUnitMgrImpl.java:117)
> 4XESTACKTRACE                at com/ibm/ws/runtime/component/CompositionUnitMgrImpl$CUInitializer.run(CompositionUnitMgrImpl.java:899)
> 4XESTACKTRACE                at com/ibm/wsspi/runtime/component/WsComponentImpl$_AsynchInitializer.run(WsComponentImpl.java:496)
> 4XESTACKTRACE                at com/ibm/ws/util/ThreadPool$Worker.run(ThreadPool.java:1656(Compiled
Code))
> {code}
> We run into this quite often, so it's kind of reproducible. We have the same behaviour
as well with other thread combinations (e.g. Sling Notifier and FelixFrameworkWiring) hitting
the same locks.



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