[
https://issues.apache.org/jira/browse/SLING-4556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14502691#comment-14502691
]
Carsten Ziegeler commented on SLING-4556:
-----------------------------------------
I see this on a shutdown of Sling's launchpad sometimes:
ERROR: Error calling StartupListener
org.apache.sling.discovery.impl.common.heartbeat.HeartbeatHandler@37958652
(java.lang.NullPointerException)
java.lang.NullPointerException
at
org.apache.sling.resourceresolver.impl.ResourceResolverImpl.create(ResourceResolverImpl.java:1123)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:611)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:599)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:599)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:599)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:599)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
at
org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
at
org.apache.sling.discovery.impl.common.resource.ResourceHelper.getOrCreateResource(ResourceHelper.java:45)
at
org.apache.sling.discovery.impl.common.heartbeat.HeartbeatHandler.issueClusterLocalHeartbeat(HeartbeatHandler.java:298)
at
org.apache.sling.discovery.impl.common.heartbeat.HeartbeatHandler.issueHeartbeat(HeartbeatHandler.java:262)
at
org.apache.sling.discovery.impl.common.heartbeat.HeartbeatHandler.startupFinished(HeartbeatHandler.java:140)
at
org.apache.sling.discovery.impl.common.heartbeat.HeartbeatHandler.inform(HeartbeatHandler.java:133)
at
org.apache.sling.launchpad.base.impl.DefaultStartupHandler$1.addingService(DefaultStartupHandler.java:146)
at
org.apache.sling.launchpad.base.impl.DefaultStartupHandler$1.addingService(DefaultStartupHandler.java:129)
at
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:941)
at
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:870)
at
org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229)
at
org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:901)
at
org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:987)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
at
org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4547)
at org.apache.felix.framework.Felix.registerService(Felix.java:3521)
at
org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:1003)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:992)
at
org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:134)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:1044)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:841)
at
org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:931)
at
org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:895)
at
org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1480)
at
org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1401)
at
org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:1210)
at
org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:1148)
at
org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1432)
at
org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:987)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
at
org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4547)
at org.apache.felix.framework.Felix.registerService(Felix.java:3521)
at
org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:1003)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:992)
at
org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:134)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:1044)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:841)
at
org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:931)
at
org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:895)
at
org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1480)
at
org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1401)
at
org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:1210)
at
org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:1148)
at
org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1432)
at
org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:987)
at
org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
at
org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4547)
at org.apache.felix.framework.Felix.registerService(Felix.java:3521)
at
org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)
at
org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:322)
at
org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator.registerFactory(ResourceResolverFactoryActivator.java:584)
at
org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator.checkFactoryPreconditions(ResourceResolverFactoryActivator.java:611)
at
org.apache.sling.resourceresolver.impl.ResourceResolverFactoryActivator.run(ResourceResolverFactoryActivator.java:706)
at java.lang.Thread.run(Thread.java:745)
Maybe this is a race condition, where the new resource resolver factory is
registered - at this moment the jcr provider is active. However when the call
is made to the resource resolver from the discovery code, the jcr provider is
already gone and the unregistration of the resource resolver factory is in
process. This could also happen on startup, if e.g. the jcr provider bundle
restarts.
If this assumption is true, then it's more a problem of the resource resolver
factory and its reregistration
> NPE in DiscoveryServiceImpl#activate
> ------------------------------------
>
> Key: SLING-4556
> URL: https://issues.apache.org/jira/browse/SLING-4556
> Project: Sling
> Issue Type: Bug
> Components: Extensions
> Affects Versions: Discovery Impl 1.1.0
> Reporter: Carsten Ziegeler
> Fix For: Discovery Impl 1.1.2
>
>
> 31.03.2015 05:33:44.001 *ERROR* [Thread-77] org.apache.sling.discovery.impl
> [org.apache.sling.discovery.impl.DiscoveryServiceImpl(85)] The activate
> method has thrown an exception (java.lang.NullPointerException)
> java.lang.NullPointerException: null
> at
> org.apache.sling.resourceresolver.impl.ResourceResolverImpl.create(ResourceResolverImpl.java:1123)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:611)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:599)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:599)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResourceInternal(ResourceUtil.java:599)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:554)
> at
> org.apache.sling.api.resource.ResourceUtil.getOrCreateResource(ResourceUtil.java:528)
> at
> org.apache.sling.discovery.impl.common.resource.ResourceHelper.getOrCreateResource(ResourceHelper.java:45)
> at
> org.apache.sling.discovery.impl.topology.announcement.AnnouncementRegistryImpl.listAnnouncementsInSameCluster(AnnouncementRegistryImpl.java:150)
> at
> org.apache.sling.discovery.impl.topology.announcement.AnnouncementRegistryImpl.listInstances(AnnouncementRegistryImpl.java:542)
> at
> org.apache.sling.discovery.impl.DiscoveryServiceImpl.getTopology(DiscoveryServiceImpl.java:443)
> at
> org.apache.sling.discovery.impl.DiscoveryServiceImpl.activate(DiscoveryServiceImpl.java:149)
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