Intermittent IllegalArgumentException while using declarative services
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Key: FELIX-539
URL: https://issues.apache.org/jira/browse/FELIX-539
Project: Felix
Issue Type: Bug
Components: Declarative Services (SCR)
Affects Versions: felix-1.0.4
Reporter: Rajini Sivaram
I get an intermittent (very rare) exception while running tests using
declarative services under Felix.
The exception stack trace shows:
java.lang.IllegalArgumentException: Service object cannot be null.
at org.apache.felix.framework.Felix.registerService(Felix.java:2661)
at
org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:254)
at
org.apache.felix.scr.impl.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:598)
at
org.apache.felix.scr.impl.AbstractComponentManager.activateInternal(AbstractComponentManager.java:426)
at
org.apache.felix.scr.impl.AbstractComponentManager.enableInternal(AbstractComponentManager.java:323)
at
org.apache.felix.scr.impl.AbstractComponentManager.access$000(AbstractComponentManager.java:36)
at
org.apache.felix.scr.impl.AbstractComponentManager$1.run(AbstractComponentManager.java:94)
at
org.apache.felix.scr.impl.ComponentActorThread.run(ComponentActorThread.java:85)
Whenever I have seen the exception, logs suggest that the components were being
reactivated at around the same time. The stack trace from the debugger when
reactivate occurs shows:
ImmediateComponentManager.disposeImplementationObject(Object,
ComponentContext) line: 273
ImmediateComponentManager.deleteComponent() line: 151
ImmediateComponentManager(AbstractComponentManager).deactivateInternal() line:
469
ImmediateComponentManager(AbstractComponentManager).reactivate() line:
142
ImmediateComponentManager.reconfigure(Dictionary) line: 399
ImmediateComponentManager$1.updated(Dictionary) line: 90
ConfigurationManager$ManagedServiceUpdate.run() line: 863
UpdateThread.run() line: 89
Would it be possible to introduce some synchronization during
activate/deactivate to avoid the service/component being set to null? I am
using Felix framework 1.1.0-SNAPSHOT and SCR 1.0.0.
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