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https://issues.apache.org/jira/browse/FELIX-4069?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
David Jencks updated FELIX-4069:
--------------------------------
Summary: [DS] ConcurrentModificationException in
ServiceFactoryComponentManager (was: ConcurrentModificationException in
ServiceFactoryComponentManager)
> [DS] ConcurrentModificationException in ServiceFactoryComponentManager
> ----------------------------------------------------------------------
>
> Key: FELIX-4069
> URL: https://issues.apache.org/jira/browse/FELIX-4069
> Project: Felix
> Issue Type: Bug
> Components: Declarative Services (SCR)
> Affects Versions: scr-1.6.2
> Environment: Windows 7
> Reporter: Adam Purkiss
> Assignee: David Jencks
> Fix For: scr-1.8.0
>
>
> During startup of our application that is heavily dependant on DS and felix
> we occasionally see the following error:
> ERROR: Bundle DwsCoreImpl.DwsCoreLogProviderImpl [37] EventDispatcher: Error
> during dispatch. (java.util.ConcurrentModificationException)
> java.util.ConcurrentModificationException
> at
> java.util.IdentityHashMap$IdentityHashMapIterator.nextIndex(IdentityHashMap.java:732)
> at
> java.util.IdentityHashMap$KeyIterator.next(IdentityHashMap.java:822)
> at
> org.apache.felix.scr.impl.manager.ServiceFactoryComponentManager.invokeBindMethod(ServiceFactoryComponentManager.java:204)
> at
> org.apache.felix.scr.impl.manager.DependencyManager.serviceAdded(DependencyManager.java:402)
> at
> org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:159)
> 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:4419)
> at org.apache.felix.framework.Felix.registerService(Felix.java:3423)
> at
> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:660)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:644)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:688)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1481)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:550)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:261)
> at
> org.apache.felix.scr.impl.config.ImmediateComponentHolder.enableComponents(ImmediateComponentHolder.java:328)
> at
> org.apache.felix.scr.impl.BundleComponentActivator.initialize(BundleComponentActivator.java:158)
> at
> org.apache.felix.scr.impl.BundleComponentActivator.<init>(BundleComponentActivator.java:113)
> at
> org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:261)
> at
> org.apache.felix.scr.impl.Activator.bundleChanged(Activator.java:179)
> at
> org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:868)
> at
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:789)
> at
> org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:514)
> at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4403)
> at org.apache.felix.framework.Felix.startBundle(Felix.java:2092)
> at
> org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1291)
> at
> org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)
> at java.lang.Thread.run(Thread.java:722)
> FrameworkEvent ERROR
> java.util.ConcurrentModificationException
> at
> java.util.IdentityHashMap$IdentityHashMapIterator.nextIndex(IdentityHashMap.java:732)
> at
> java.util.IdentityHashMap$KeyIterator.next(IdentityHashMap.java:822)
> at
> org.apache.felix.scr.impl.manager.ServiceFactoryComponentManager.invokeBindMethod(ServiceFactoryComponentManager.java:204)
> at
> org.apache.felix.scr.impl.manager.DependencyManager.serviceAdded(DependencyManager.java:402)
> at
> org.apache.felix.scr.impl.manager.DependencyManager.serviceChanged(DependencyManager.java:159)
> at
> org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:932)
> at
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:793)
> at
> org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:543)
> at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4419)
> at org.apache.felix.framework.Felix.registerService(Felix.java:3423)
> at
> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:660)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:644)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:688)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1481)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:550)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:261)
> at
> org.apache.felix.scr.impl.config.ImmediateComponentHolder.enableComponents(ImmediateComponentHolder.java:328)
> at
> org.apache.felix.scr.impl.BundleComponentActivator.initialize(BundleComponentActivator.java:158)
> at
> org.apache.felix.scr.impl.BundleComponentActivator.<init>(BundleComponentActivator.java:113)
> at
> org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:261)
> at
> org.apache.felix.scr.impl.Activator.bundleChanged(Activator.java:179)
> at
> org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:868)
> at
> org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:789)
> at
> org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:514)
> at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4403)
> at org.apache.felix.framework.Felix.startBundle(Felix.java:2092)
> at
> org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1291)
> at
> org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:304)
> at java.lang.Thread.run(Thread.java:722)
> Looking at the ServiceFactoryComponentManager we see there is no protection
> around the iteration over components which makes it no surprise that the code
> is not thread safe and is suffering from concurrent modification. Although
> most of our system seems to be working this exception at startup is cause for
> wider concern on how thread safe the code is and if later on when we have
> even more services we will start seeing bigger issues that mean ditching scr
> and using some other solution.
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