[
https://issues.apache.org/jira/browse/FELIX-4670?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jörg Hoh updated FELIX-4670:
----------------------------
Description:
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.
was:
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.
> 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
>
> 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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