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https://issues.apache.org/jira/browse/FELIX-3675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477243#comment-13477243
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David Jencks commented on FELIX-3675:
-------------------------------------
Original NPE fixed in rev 1381408. There are a couple more opportunities for
problems in update and unbind methods, such as
java.lang.NullPointerException
> at
> org.apache.felix.scr.impl.helper.BindMethod.getParameters(BindMethod.java:610)
> at
> org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:233)
> at
> org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:37)
> at
> org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:611)
> at
> org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:492)
> at
> org.apache.felix.scr.impl.manager.DependencyManager.invokeUnbindMethod(DependencyManager.java:1276)
> at
> org.apache.felix.scr.impl.manager.DependencyManager.unbind(DependencyManager.java:1131)
> at
> org.apache.felix.scr.impl.manager.DependencyManager.close(DependencyManager.java:970)
> at
> org.apache.felix.scr.impl.manager.ImmediateComponentManager.disposeImplementationObject(ImmediateComponentManager.java:274)
> at
> org.apache.felix.scr.impl.manager.ImmediateComponentManager.deleteComponent(ImmediateComponentManager.java:147)
> at
> org.apache.felix.scr.impl.manager.AbstractComponentManager$Active.ungetService(AbstractComponentManager.java:1697)
> at
> org.apache.felix.scr.impl.manager.ImmediateComponentManager.ungetService(ImmediateComponentManager.java:692)
these should be fixed in r1398912.
> [DS] NPE shutting down a component due to service already removed
> -----------------------------------------------------------------
>
> Key: FELIX-3675
> URL: https://issues.apache.org/jira/browse/FELIX-3675
> Project: Felix
> Issue Type: Bug
> Components: Declarative Services (SCR)
> Affects Versions: scr-1.8.0
> Reporter: David Jencks
> Fix For: scr-1.8.0
>
>
> Stack trace looks like this:
> >Stack Dump = java.lang.NullPointerException
> > at
> > org.apache.felix.scr.impl.helper.BindMethod.getParameters(BindMethod.java:610)
> > at
> > org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:233)
> > at
> > org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:37)
> > at
> > org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:611)
> > at
> > org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:492)
> > at
> > org.apache.felix.scr.impl.manager.DependencyManager.invokeUnbindMethod(DependencyManager.java:1276)
> > at
> > org.apache.felix.scr.impl.manager.DependencyManager.unbind(DependencyManager.java:1131)
> > at
> > org.apache.felix.scr.impl.manager.DependencyManager.close(DependencyManager.java:970)
> > at
> > org.apache.felix.scr.impl.manager.ImmediateComponentManager.disposeImplementationObject(ImmediateComponentManager.java:274)
> > at
> > org.apache.felix.scr.impl.manager.ImmediateComponentManager.deleteComponent(ImmediateComponentManager.java:147)
> > at
> > org.apache.felix.scr.impl.manager.AbstractComponentManager$Active.ungetService(AbstractComponentManager.java:1697)
> > at
> > org.apache.felix.scr.impl.manager.ImmediateComponentManager.ungetService(ImmediateComponentManager.java:692)
> I think that one thread is ungetting a service supplied by a DS component,
> and another thread is removing one of the dependencies of the DS component.
> The shutdown thread (a) gets all the service references and then (b) goes
> through and tries to unbind them. The parameter info for a service reference
> can be removed if another thread removes the service reference between (a)
> and (b).
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