Guillaume Nodet created FELIX-4308:
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Summary: Deadlock with dynamic imports
Key: FELIX-4308
URL: https://issues.apache.org/jira/browse/FELIX-4308
Project: Felix
Issue Type: Bug
Components: Framework
Affects Versions: framework-4.2.1
Reporter: Guillaume Nodet
When a bundle has some dynamic imports, the framework will try to grab the
bundle lock. However, this is triggered by a simple class load, which can not
be easily controller.
This is quite problematic with concurrent access to bundles and can result in
deadlocks.
My use case is the following:
* Configuration admin calls on the service registered by the same bundle
which triggers a getService and a bundle#classLoad
* a thread does a bundle refresh on a bundle
We end up with the following deadlock:
* thread 1
- configadmin wants to update the service
- the framework calls getService grabbing a lock on the service
registration
- the service is backed by scr and triggers a class load, waiting to grab
the global lock
* thread 2
- refreshPackages (acquire global lock)
- stopBundle (acquire bundle lock)
- unregister services
- blocked on the service registration
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