Tom Lomax created STANBOL-1144:
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Summary: NamedEntityTaggingEngine produces invalid TextAnnotations
leading to NullPointerException during enhancement
Key: STANBOL-1144
URL: https://issues.apache.org/jira/browse/STANBOL-1144
Project: Stanbol
Issue Type: Bug
Components: Enhancement Engines
Affects Versions: enhancement-engines-0.10.0
Environment: Any
Reporter: Tom Lomax
Priority: Critical
Some particular pieces of text, when sent to the enhancer, cause a crash in the
Solr Yard code. e.g. trying to enhance the following:
Syrian regime!"
(That's "Syrian regime" followed by an exclamation point and a double quote).
...results in a NullPointerException in the dbpediaLinking phase:
Caused by: java.lang.NullPointerException
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrQueryFactory.initTextConstraint(SolrQueryFactory.java:415)
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrQueryFactory.createIndexConstraint(SolrQueryFactory.java:330)
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrQueryFactory.parseFieldQuery(SolrQueryFactory.java:235)
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrYard.find(SolrYard.java:267)
at
org.apache.stanbol.entityhub.yard.solr.impl.SolrYard.findRepresentation(SolrYard.java:362)
at
org.apache.stanbol.entityhub.core.site.CacheImpl.findRepresentation(CacheImpl.java:192)
at
org.apache.stanbol.entityhub.core.impl.ReferencedSiteImpl.findEntities(ReferencedSiteImpl.java:151)
at
org.apache.stanbol.enhancer.engines.entitytagging.impl.NamedEntityTaggingEngine.computeEntityRecommentations(NamedEntityTaggingEngine.java:505)
at
org.apache.stanbol.enhancer.engines.entitytagging.impl.NamedEntityTaggingEngine.computeEnhancements(NamedEntityTaggingEngine.java:370)
at
org.apache.stanbol.enhancer.jobmanager.event.impl.EnhancementJobHandler.processEvent(EnhancementJobHandler.java:271)
at
org.apache.stanbol.enhancer.jobmanager.event.impl.EnhancementJobHandler.handleEvent(EnhancementJobHandler.java:189)
at
org.apache.felix.eventadmin.impl.tasks.HandlerTaskImpl.execute(HandlerTaskImpl.java:88)
at
org.apache.felix.eventadmin.impl.tasks.SyncDeliverTasks.execute(SyncDeliverTasks.java:221)
at
org.apache.felix.eventadmin.impl.tasks.AsyncDeliverTasks$TaskExecuter.run(AsyncDeliverTasks.java:110)
at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unknown
Source)
at java.lang.Thread.run(Thread.java:724)
I believe the cause of this is in
enhancement-engines/entitytagging/src/main/java/org/apache/stanbol/enhancer/engines/entitytagging/impl/NamedEntity::createFromTextAnnotation,
called by NamedEntityTaggingEngine::computeEnhancements, where it verifies the
supplied entity name is not null or empty, but later removes punctuation and
calls trim() again (the cleanupKeywords method), resulting in a possibility for
an empty entity name to be included in the TextAnnotation being generated.
Should be an easy fix - providing this is the correct place to fix it. I will
attach a patch.
I have reproduced this on clean installs of 0.10.10, and trunk as of this
morning (r1509579).
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