Carsten Ziegeler created FELIX-5028:
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Summary: ServiceFactory for components might return null
Key: FELIX-5028
URL: https://issues.apache.org/jira/browse/FELIX-5028
Project: Felix
Issue Type: Bug
Components: Declarative Services (SCR)
Affects Versions: scr-2.0.0
Reporter: Carsten Ziegeler
Fix For: scr-2.0.2
There seems to be an uneven handling of locking/status information in
getService/ungetService of the service factory registered by the
SingleComponentManager. (I didn't check the other factories)
We have a concurrent get/ungetService for the same service. While the unget
service uses a lock around decrementing the counter, incrementing the counter
and other actions in getService are not using the lock. There is a partial lock
there.
But this can lead to the problem that while the preconditions for getService
are still fine, ungetService cleans up which then makes getService to return
null.
We have a huge app where we can reproduce the problem, I'll try to trim this
down to a simple test case.
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