Get a ServiceFactory.getService() resulted in a cycle message when registering
a service inside a DS activation method
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Key: FELIX-2923
URL: https://issues.apache.org/jira/browse/FELIX-2923
Project: Felix
Issue Type: Bug
Components: Declarative Services (SCR)
Affects Versions: scr-1.6.0
Reporter: David Humeniuk
I've run into an issue with Felix SCR where I get the message:
ServiceFactory.getService() resulted in a cycle
The reason this appers to be occuring is because within an activation method of
a service component, call it ServiceAImpl (which provides ServiceA), the
component registers another service, call it ServiceB.
I have another service component, call it ServiceCImpl, which depends on both
ServiceA and ServiceB. When ServiceAImpl registers ServiceB, ServiceCImpl is
attemted to be activated within the call to activate ServiceAImpl. As part of
the activation, the ServiceCImpl binding methods are called (at least
attempted). When the binding method for ServiceA is attempted, the cycle is
detected and the component fails to initialize.
I guess what doesn't make sense is why the SCR will activate ServiceCImpl
within the activation method of ServiceAImpl. I wouldn't think that
ServiceCImpl would be considered satisfied until after the activation method
has exited. Perhaps this is an issue of using declarative services while still
registering services directly with the framework?
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