Improve logging on IllegalStateException getting a service
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Key: FELIX-2372
URL: https://issues.apache.org/jira/browse/FELIX-2372
Project: Felix
Issue Type: Improvement
Components: Declarative Services (SCR)
Affects Versions: scr-1.4.0
Reporter: Felix Meschberger
Assignee: Felix Meschberger
Fix For: scr-1.4.2
BundleContext.getService() may throw an IllegalStateException if the bundle
context is invalid. In addition the Felix implementation may also throw this
exception of the service to be trieved is a ServiceFactory whose real service
cannot be retrieved due to a cycle in service dependencies.
The DependencyManager should log this exception clearly to help solve the
actual problem.
In the current Felix Declarative Service implementation such a loop can be
created if there is a depedency loop amongst delayed service components, like
this:
Delayed Component A, provides Service A, requires Service C
Delayed Component B, provides Service B, requires Service A
Delayed Component C, provides Service C, requires Service B
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