Rupert Westenthaler created STANBOL-1445:
--------------------------------------------

             Summary: NPE in TrackingDereferencerBase.java:308
                 Key: STANBOL-1445
                 URL: https://issues.apache.org/jira/browse/STANBOL-1445
             Project: Stanbol
          Issue Type: Bug
          Components: Enhancement Engines
         Environment: 
enhancer.engine.dereference.filterContentlanguages=B"false"
enhancer.engines.dereference.ldpath=["{some-ldpath}"]
enhancer.engines.dereference.fields=
            Reporter: Rupert Westenthaler
            Assignee: Rupert Westenthaler
            Priority: Minor


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

{code:none}
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
{code}



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