I'm using Felix 4.0.2 and SCR 1.6.2 (all components below are DS
components).
Actual system is more complicated, but here's basically what I have:
An immediate component (called MessageServiceImpl) with a service
reference (call it MessageRouter) and another delayed component (called
MessageRouterImpl) and it provides MessageRouter. There's another
component (call it X) that also has a service reference for
MessageRouter.
When the delayed component MessgaeRouterImpl is activated, MessageRouter
is provided and then the immediate component MessageServiceImpl can be
activated as well as component X (which is a factory component
instance). Everything works fine until the factory component instance X
is removed. When component X is removed, the MessageRouterImpl is
deactivated because the reference count for MessageRouter is 0.
However, the reference count should be higher, because
MessageServiceImpl still references it.
When debugging, I notice that the reference count for MessageRouter is
decremented twice when the factory component X is disposed. So why does
this happen? I notice in the stack trace below that
"AbstractComponentManager$FactoryInstance(AbstractComponentManager$State
).doDeactivate" will call deleteComponent at line 1305 that ungets the
service (and decrements the counter) and deactivateDependencyManagers at
line 1306 that ungets the service again (and decrements the counter).
Daemon Thread [Thread-3] (Suspended (breakpoint at line 403 in
ServiceRegistry))
owns: ServiceRegistry (id=197)
owns: RemoteChannelLookupImpl (id=236)
ServiceRegistry.ungetService(Bundle, ServiceReference)
line: 403
Felix.ungetService(Bundle, ServiceReference) line: 3432
BundleContextImpl.ungetService(ServiceReference) line:
486
DependencyManager.ungetService(ServiceReference) line:
961
DependencyManager.unbind(Object, ServiceReference[])
line: 1204
DependencyManager.close(Object) line: 1031
ComponentFactoryImpl$ComponentFactoryNewInstance(ImmediateComponentManag
er).disposeImplementationObject(Object, ComponentContext, int) line: 284
ComponentFactoryImpl$ComponentFactoryNewInstance(ImmediateComponentManag
er).deleteComponent(int) line: 152
AbstractComponentManager$FactoryInstance(AbstractComponentManager$State)
.doDeactivate(AbstractComponentManager, int, boolean) line: 1305
Daemon Thread [Thread-3] (Suspended (breakpoint at line 403 in
ServiceRegistry))
owns: ServiceRegistry (id=197)
owns: RemoteChannelLookupImpl (id=236)
ServiceRegistry.ungetService(Bundle, ServiceReference)
line: 403
Felix.ungetService(Bundle, ServiceReference) line: 3432
BundleContextImpl.ungetService(ServiceReference) line:
486
DependencyManager.ungetService(ServiceReference) line:
961
DependencyManager.deactivate() line: 652
ComponentFactoryImpl$ComponentFactoryNewInstance(AbstractComponentManage
r).deactivateDependencyManagers() line: 1065
AbstractComponentManager.access$200(AbstractComponentManager) line: 62
AbstractComponentManager$FactoryInstance(AbstractComponentManager$State)
.doDeactivate(AbstractComponentManager, int, boolean) line: 1306
Thanks,
Dave Humeniuk
Software Engineer
Sensor System Division (SSD)
University of Dayton Research Institute
