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Posted to dev@felix.apache.org by "David Jencks (JIRA)" <ji...@apache.org> on 2013/02/05 08:12:12 UTC

[jira] [Created] (FELIX-3891) [DS] synchronization around registerService can create deadlocks

David Jencks created FELIX-3891:
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             Summary: [DS] synchronization around registerService can create deadlocks
                 Key: FELIX-3891
                 URL: https://issues.apache.org/jira/browse/FELIX-3891
             Project: Felix
          Issue Type: Bug
          Components: Declarative Services (SCR)
    Affects Versions: scr-1.8.0
            Reporter: David Jencks
            Assignee: David Jencks
             Fix For: scr-1.8.0


We've found a deadlock from the synchronization around the service registration.  This particular one comes from two threads trying to activate the service concurrently.  The losing thread came from PackageAdmin refresh bundles thread, whereas the winning thread triggered another component creation whose activate method calls Package admin to do some work.  (this is eclipse package admin, not sure if felix has the same problem).

Thinking about it some more I don't think we need to synchronize, it doesn't matter which thread wins the service registration as long as it's registered soon.

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