Intermittent deadlock while using declarative services in Tuscany
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Key: FELIX-489
URL: https://issues.apache.org/jira/browse/FELIX-489
Project: Felix
Issue Type: Bug
Components: Declarative Services
Affects Versions: 1.0.0
Reporter: Rajini Sivaram
One of my tests using declarative services hangs intermittently. The stack
trace from a debugger shows two threads waiting for locks owned by the other. I
am using Felix framework 1.0.3 and SCR 1.0.0. The call from the main thread to
getService is triggered by Tuscany - I am not sure if there are times when it
shouldn't call bundleContext.getService. But the order of locking in the two
threads are different leading to the deadlock - is it something that could be
fixed? The main thread owns the ServiceRegistry lock and is waiting for the
lock on ServiceFactoryComponentManager, while the configuration updater owns
the ServiceFactoryComponentManager lock and is waiting for the ServiceRegistry
lock.
Thread [main] (Suspended)
ServiceFactoryComponentManager.getService(Bundle, ServiceRegistration) line:
111
ServiceRegistrationImpl.getFactoryUnchecked(Bundle) line: 245
ServiceRegistrationImpl.getService(Bundle) line: 179
ServiceRegistry.getService(Bundle, ServiceReference) line: 238
Felix.getService(Bundle, ServiceReference) line: 2835
BundleContextImpl.getService(ServiceReference) line: 417
.............. (Tuscany)
Thread [Configuration Updater] (Suspended)
ServiceRegistry.unregisterService(Bundle, ServiceRegistration) line: 78
ServiceRegistrationImpl.unregister() line: 99
ServiceFactoryComponentManager(AbstractComponentManager).unregisterComponentService()
line: 610
ServiceFactoryComponentManager(AbstractComponentManager).deactivateInternal()
line: 464
ServiceFactoryComponentManager(AbstractComponentManager).reactivate() line:
142
ServiceFactoryComponentManager(ImmediateComponentManager).reconfigure(Dictionary)
line: 399
ImmediateComponentManager$1.updated(Dictionary) line: 90
ConfigurationManager$ManagedServiceUpdate.run() line: 863
UpdateThread.run() line: 89
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