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Posted to dev@sling.apache.org by "Stefan Egli (JIRA)" <ji...@apache.org> on 2016/03/22 10:12:25 UTC
[jira] [Created] (SLING-5622) Deadlock between service unregister
(thus unbindTopologyEventListener) and discoveryLiteCheck
Stefan Egli created SLING-5622:
----------------------------------
Summary: Deadlock between service unregister (thus unbindTopologyEventListener) and discoveryLiteCheck
Key: SLING-5622
URL: https://issues.apache.org/jira/browse/SLING-5622
Project: Sling
Issue Type: Bug
Components: Extensions
Affects Versions: Discovery Oak 1.2.6, Resource Resolver 1.4.8
Environment: discovery.oak 1.2.6
resourceresolver 1.4.8
Reporter: Stefan Egli
Priority: Critical
There's a java level deadlock between the following two threads, excerpts below. It's not yet clear if this is an issue of discovery.oak or resourceresolver.
thread 1:
{noformat}
"LeaseFailureHandler-Thread" daemon prio=5 tid=0x7f34 nid=0xffffffff in Object.wait()
java.lang.Thread.State: WAITING (on object monitor)
at sun.misc.Unsafe.park(Native Method)
- waiting to lock <0x575a7644> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) owned by "discovery.connectors.common.runner.e8dd34be-8886-4e5d-891f-5509b4dea0f0.discoveryLiteChec
k" tid=0x4,330
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
at org.apache.sling.discovery.oak.OakDiscoveryService.unbindTopologyEventListener(OakDiscoveryService.java:368)
...
at org.apache.felix.framework.ServiceRegistrationImpl.unregister(ServiceRegistrationImpl.java:144)
at org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator.unregisterFactory(ResourceResolverFactoryActivator.java:611)
at org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator.unregisterFactory(ResourceResolverFactoryActivator.java:602)
at org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator.checkFactoryPreconditions(ResourceResolverFactoryActivator.java:674)
at org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator.access$100(ResourceResolverFactoryActivator.java:79)
at org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator$1.providerRemoved(ResourceResolverFactoryActivator.java:500)
at org.apache.sling.resourceresolver.impl.providers.ResourceProviderTracker.unregister(ResourceProviderTracker.java:224)
- locked <0x35cd7613> (a java.util.HashMap)
at org.apache.sling.resourceresolver.impl.providers.ResourceProviderTracker.access$100(ResourceProviderTracker.java:58)
at org.apache.sling.resourceresolver.impl.providers.ResourceProviderTracker$1.removedService(ResourceProviderTracker.java:109)
...
at org.apache.felix.framework.ServiceRegistrationImpl.unregister(ServiceRegistrationImpl.java:144)
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.unregisterService(AbstractSlingRepositoryManager.java:262)
at org.apache.sling.jcr.base.AbstractSlingRepositoryManager.stop(AbstractSlingRepositoryManager.java:389)
...
at org.apache.felix.framework.BundleImpl.stop(BundleImpl.java:1038)
at org.apache.felix.framework.BundleImpl.stop(BundleImpl.java:1024)
at org.apache.jackrabbit.oak.plugins.document.DocumentNodeStoreService$1.handleLeaseFailure(DocumentNodeStoreService.java:413)
at org.apache.jackrabbit.oak.plugins.document.ClusterNodeInfo$1.run(ClusterNodeInfo.java:696)
at java.lang.Thread.run(Thread.java:745)
Locked ownable synchronizers:
- locked <0x4402f4fd> (a java.util.concurrent.locks.ReentrantLock$FairSync)
- locked <0x1e2230ed> (a java.util.concurrent.locks.ReentrantLock$FairSync)
- locked <0x56ba270f> (a java.util.concurrent.locks.ReentrantLock$FairSync)
{noformat}
and thread 2:
{noformat}
"discovery.connectors.common.runner.e8dd34be-8886-4e5d-891f-5509b4dea0f0.discoveryLiteCheck" daemon prio=5 tid=0x10ea nid=0xffffffff waiting for monitor entry
java.lang.Thread.State: BLOCKED
at org.apache.sling.resourceresolver.impl.providers.ResourceProviderTracker.getResourceProviderStorage(ResourceProviderTracker.java:364)
- waiting to lock <0x35cd7613> (a java.util.HashMap) owned by "LeaseFailureHandler-Thread" tid=0x32,564
at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.createControl(ResourceResolverImpl.java:154)
at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.<init>(ResourceResolverImpl.java:116)
at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.<init>(ResourceResolverImpl.java:110)
at org.apache.sling.resourceresolver.impl.CommonResourceResolverFactoryImpl.getResourceResolverInternal(CommonResourceResolverFactoryImpl.java:257)
at org.apache.sling.resourceresolver.impl.CommonResourceResolverFactoryImpl.getAdministrativeResourceResolver(CommonResourceResolverFactoryImpl.java:140)
at org.apache.sling.resourceresolver.impl.ResourceResolverFactoryImpl.getAdministrativeResourceResolver(ResourceResolverFactoryImpl.java:107)
at org.apache.sling.discovery.oak.cluster.OakClusterViewService.getResourceResolver(OakClusterViewService.java:103)
at org.apache.sling.discovery.oak.cluster.OakClusterViewService.getLocalClusterView(OakClusterViewService.java:110)
at org.apache.sling.discovery.base.commons.BaseDiscoveryService.getTopology(BaseDiscoveryService.java:77)
at org.apache.sling.discovery.oak.OakDiscoveryService.checkForTopologyChange(OakDiscoveryService.java:657)
at org.apache.sling.discovery.oak.pinger.OakViewChecker.discoveryLiteCheck(OakViewChecker.java:232)
- locked <0x740a9729> (a java.lang.Object)
at org.apache.sling.discovery.oak.pinger.OakViewChecker.access$000(OakViewChecker.java:64)
at org.apache.sling.discovery.oak.pinger.OakViewChecker$1.run(OakViewChecker.java:208)
at org.apache.sling.discovery.base.commons.PeriodicBackgroundJob.safelyRun(PeriodicBackgroundJob.java:86)
at org.apache.sling.discovery.base.commons.PeriodicBackgroundJob.run(PeriodicBackgroundJob.java:77)
at java.lang.Thread.run(Thread.java:745)
Locked ownable synchronizers:
- locked <0x575a7644> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
{noformat}
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