I have a thread that does a Bundle.update() call.
I have an EventAdmin based EventHandler that listens for bundle updated
events. The event handler will call Bundle.findEntries which causes a
resolve of the updated bundle.
The update call will sometimes fail with the exception:
[java] ERROR 20130321 23:34:11 ID#19 - Request to update bundle 9
failed.
[java] org.osgi.framework.BundleException: Unable to acquire global
lock for resolve.
[java] Caused by: org.apache.felix.log.LogException:
org.osgi.framework.BundleException: Unable to acquire global lock for
resolve.
[java] at
org.apache.felix.framework.Felix.resolveBundleRevision(Felix.java:3980)
[java] at
org.apache.felix.framework.Felix.startBundle(Felix.java:2037)
[java] at
org.apache.felix.framework.Felix.updateBundle(Felix.java:2404)
[java] at
org.apache.felix.framework.BundleImpl.update(BundleImpl.java:973)
We are running the latest Framework 4.2.1. We also seen this happen
previously on 4.0.3.
So the event handler will be triggered to resolve bundles and acquires
the global lock, then later the thread doing the update will try to
resolve and get the global lock (but the other thread wants its bundle
lock). So I guess the code does what it needs to, to prevent a deadlock
state. I guess I'm wondering, how should I be trying to interact with
the API in this case. Should I be putting a retry on my update call?
Something else? Is there something that explains the different locks
and how to work with them in the API or elsewhere?
Thanks,
Dave Humeniuk
Software Engineer
Sensor System Division (SSD)
University of Dayton Research Institute
