[STANBOL-1445] NPE in TrackingDereferencerBase.java:308

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.0.0, 0.12.1
• Component/s: Enhancement Engines
• Environment: enhancer.engine.dereference.filterContentlanguages=B"false"; enhancer.engines.dereference.ldpath=["{some-ldpath}"]; enhancer.engines.dereference.fields=
• Assignee: Rupert Westenthaler
• Reporter: Rupert Westenthaler
• Created: 29/Oct/15 11:27
• Updated: 29/Oct/15 11:43
• Resolved: 29/Oct/15 11:42

Description

In the case filterContentLanguages is false, no dereference fields and some LDPath is configured (see environment for details) the following NPE appears

Caused by: java.lang.NullPointerException
	at org.apache.stanbol.enhancer.engines.dereference.entityhub.TrackingDereferencerBase.dereference(TrackingDereferencerBase.java:308)
	at org.apache.stanbol.enhancer.engines.dereference.EntityDereferenceEngine.computeEnhancements(EntityDereferenceEngine.java:324)
	at org.apache.stanbol.enhancer.jobmanager.event.impl.EnhancementJobHandler.processEvent(EnhancementJobHandler.java:279)
	at org.apache.stanbol.enhancer.jobmanager.event.impl.EnhancementJobHandler.handleEvent(EnhancementJobHandler.java:197)
	at org.apache.felix.eventadmin.impl.handler.EventHandlerProxy.sendEvent(EventHandlerProxy.java:415)
	at org.apache.felix.eventadmin.impl.tasks.SyncDeliverTasks.execute(SyncDeliverTasks.java:118)
	at org.apache.felix.eventadmin.impl.tasks.AsyncDeliverTasks$TaskExecuter.run(AsyncDeliverTasks.java:159)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	... 1 more