[FELIX-3000] Move sending service registered event out of bundle lock

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: framework-3.0.7, framework-3.2.2
• Fix Version/s: framework-4.0.0
• Component/s: Framework
• Assignee: Richard S. Hall
• Reporter: Felix Meschberger
• Created: 16/Jun/11 06:49
• Updated: 20/Oct/11 08:26
• Resolved: 26/Aug/11 21:11

Description

We have a strange situation on a Framework 3.0.7 based system here which is not reproducible on all platforms.

We can track down a system freeze/deadlock to three threads all contending for bundle locks and the global lock. See attached FELIX-3000-stacktrace.txt for the stack trace.

Looking at the Framework source, particularly acquireBundleLock and acquireGlobalLock I cannot see where this "deadlock" can occur.

The only hint I have is a note in the Felix.registerService:

> // TODO: CONCURRENCY - Reconsider firing event here, outside of the
> // bundle lock.

I wonder whether this situation can be fixed with moving the service registration event ?

Looking at the code it seems to have not been changed. Thus I report this against 3.0.7 where we saw this and 3.2.2 being the latest release.

Issue Links

• relates to: FELIX-3174 Startup freeze caused in acquireBundleLock