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Posted to dev@felix.apache.org by "Adam Purkiss (JIRA)" <ji...@apache.org> on 2013/05/17 22:15:15 UTC
[jira] [Created] (FELIX-4069) ConcurrentModificationException in
ServiceFactoryComponentManager
Adam Purkiss created FELIX-4069:
-----------------------------------
Summary: 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
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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