[
https://issues.apache.org/jira/browse/ARIES-1051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845145#comment-13845145
]
Guillaume Nodet edited comment on ARIES-1051 at 12/11/13 7:11 AM:
------------------------------------------------------------------
Fwiw, I think the reason that Karaf switched to synchronous is not really
related to deadlocks, but rather to more closely follow the semantics of bundle
start levels: i.e. in asynchronous mode, bundle start levels is quite useless
as all blueprint bundles are started out of order due to the asychronous
process.
It would be awesome if one of you could come up with an integration test that
would reproduce the issue.
was (Author: gnt):
Fwiw, I think the reason that Karaf switched to synchronous is not really
related to deadlocks, but rather to more closely follow the semantics of bundle
start levels: i.e. in asynchronous mode, bundle start levels is quite useless
as all blueprint bundles are started out of order due to the asychronous
process.
> Blueprint deadlock is occured during Karaf startup or bundle update action
> --------------------------------------------------------------------------
>
> Key: ARIES-1051
> URL: https://issues.apache.org/jira/browse/ARIES-1051
> Project: Aries
> Issue Type: Bug
> Components: Blueprint
> Affects Versions: blueprint-core-1.1.0
> Environment: Windows 7, x64
> java version "1.6.0_24"
> Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
> Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)
> Karaf 2.3.1
> Reporter: Dmitry Konstantinov
> Priority: Critical
>
> There are two locks - felix bundle lock and lock of {{AtomicBoolean
> scheduled}} in BlueprintContainerImpl class and these locks can be occured in
> diferent order for some situations.
> For example:
> 1) In case of container initialization the order is following: blueprint lock
> (inside executor task) -> bundle lock (inside service registration)
> 2) In case of container destroying: bundle lock (bundle tracker) -> blueprint
> lock (BlueprintContainerImpl.namespaceHandlerUnregistered method)
> The thread dump provides a real example of the deadlock:
> {noformat}
> "Blueprint Extender: 3" daemon prio=6 tid=0x0000000006ec4000 nid=0x1658 in
> Object.wait() [0x0000000009b2e000]
> java.lang.Thread.State: WAITING (on object monitor)
> at java.lang.Object.wait(Native Method)
> - waiting on <0x00000000e098fdf0> (a [Ljava.lang.Object;)
> at java.lang.Object.wait(Object.java:485)
> at org.apache.felix.framework.Felix.acquireBundleLock(Felix.java:4871)
> - locked <0x00000000e098fdf0> (a [Ljava.lang.Object;)
> at org.apache.felix.framework.Felix.registerService(Felix.java:3205)
> at
> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
> at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.registerService(BlueprintContainerImpl.java:439)
> at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:379)
> at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:261)
> - locked <0x00000000e0274b50> (a
> java.util.concurrent.atomic.AtomicBoolean)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> org.apache.aries.blueprint.container.ExecutorServiceWrapper.run(ExecutorServiceWrapper.java:106)
> at
> org.apache.aries.blueprint.utils.threading.impl.DiscardableRunnable.run(DiscardableRunnable.java:48)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> "FelixFrameworkWiring" daemon prio=6 tid=0x0000000006eca000 nid=0x900 waiting
> for monitor entry [0x000000000b30e000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.namespaceHandlerUnregistered(BlueprintContainerImpl.java:892)
> - waiting to lock <0x00000000e0274b50> (a
> java.util.concurrent.atomic.AtomicBoolean)
> at
> org.apache.aries.blueprint.namespace.NamespaceHandlerRegistryImpl$NamespaceHandlerSetImpl.unregisterHandler(NamespaceHandlerRegistryImpl.java:582)
> at
> org.apache.aries.blueprint.namespace.NamespaceHandlerRegistryImpl.unregisterHandler(NamespaceHandlerRegistryImpl.java:173)
> at
> org.apache.aries.blueprint.namespace.NamespaceHandlerRegistryImpl.removedService(NamespaceHandlerRegistryImpl.java:144)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerRemoved(ServiceTracker.java:956)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.customizerRemoved(ServiceTracker.java:1)
> at
> org.osgi.util.tracker.AbstractTracked.untrack(AbstractTracked.java:341)
> at
> org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:902)
> at
> org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932)
> at
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:793)
> at
> org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:543)
> at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4260)
> at org.apache.felix.framework.Felix.access$000(Felix.java:74)
> at org.apache.felix.framework.Felix$1.serviceChanged(Felix.java:390)
> at
> org.apache.felix.framework.ServiceRegistry.unregisterService(ServiceRegistry.java:148)
> at
> org.apache.felix.framework.ServiceRegistrationImpl.unregister(ServiceRegistrationImpl.java:127)
> at
> org.apache.aries.util.AriesFrameworkUtil.safeUnregisterService(AriesFrameworkUtil.java:114)
> at
> org.apache.aries.blueprint.container.ServiceRecipe.unregister(ServiceRecipe.java:209)
> at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.unregisterServices(BlueprintContainerImpl.java:701)
> at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.tidyupComponents(BlueprintContainerImpl.java:907)
> at
> org.apache.aries.blueprint.container.BlueprintContainerImpl.destroy(BlueprintContainerImpl.java:857)
> at
> org.apache.aries.blueprint.container.BlueprintExtender$3.run(BlueprintExtender.java:284)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> org.apache.aries.blueprint.container.BlueprintExtender.destroyContainer(BlueprintExtender.java:305)
> at
> org.apache.aries.blueprint.container.BlueprintExtender.modifiedBundle(BlueprintExtender.java:206)
> at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:500)
> at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:433)
> at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.track(BundleHookBundleTracker.java:725)
> at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.bundleChanged(BundleHookBundleTracker.java:463)
> at
> org.apache.aries.util.tracker.hook.BundleHookBundleTracker$BundleEventHook.event(BundleHookBundleTracker.java:422)
> at
> org.apache.felix.framework.util.SecureAction.invokeBundleEventHook(SecureAction.java:1103)
> at
> org.apache.felix.framework.util.EventDispatcher.createWhitelistFromHooks(EventDispatcher.java:695)
> at
> org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:483)
> at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4244)
> at org.apache.felix.framework.Felix.stopBundle(Felix.java:2351)
> at org.apache.felix.framework.Felix$RefreshHelper.stop(Felix.java:4629)
> at org.apache.felix.framework.Felix.refreshPackages(Felix.java:3951)
> at
> org.apache.felix.framework.FrameworkWiringImpl.run(FrameworkWiringImpl.java:172)
> at java.lang.Thread.run(Thread.java:662)
> {noformat}
--
This message was sent by Atlassian JIRA
(v6.1.4#6159)
