I was able to reduce the query and still get the error
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX rs: <http://www.SemanticRecommender.com/rs#>
PREFIX bo: <http://www.BookOntology.com/bo#>
PREFIX : <http://www.SemanticBookOntology.com/sbo#>
SELECT distinct ?item ?itemClass ?userContext ?skip ?userContextWeight ?reason
((?similarity * ?importance * ?levelImportance * ?ratingValue) as
?finalSimilarity) ?userClass
WHERE
{
{
VALUES ?user { bo:ania }
values ?item {:exampleBook}
}
#
OPTIONAL
{
# VALUES ?user { rs:Issac_Newton }
?userContext rdf:type rs:UserContext ;
rs:appliedOnItems ?itemClass ;
rs:appliedOnUsers ?userClass .
OPTIONAL
{ ?userContext rs:hasWeightIfContextMatched ?weightMatched }
OPTIONAL
{ ?userContext rs:hasWeightIfContextDoesNotMatch ?weightNotMatched }
OPTIONAL
{ ?userContext rs:doNotRecommendInCaseNotMatch true
BIND(1 AS ?skip_)
}
}
VALUES ?user { bo:ania }
bind(if (bound(?skip_) && (not EXISTS {?user a ?userClass}) && (EXISTS
{?item a ?itemClass}) , ?skip_, 0) as ?skip1)
values (?defaultUserMatched ?defaultUserNotMatched) {(1 0.5)}
BIND(if(EXISTS { ?user rdf:type ?userClass },
coalesce(?weightMatched, ?defaultUserMatched), coalesce(?weightNotMatched,
?defaultUserNotMatched)) AS ?weight)
bind (if ( exists {?item a ?itemClass }, true , false) as
?doesItemBelongToUserContextItemClass)
values ?defaultNoUserContext {1}
BIND(if(bound(?skip1), ?skip1, 0) as ?skip)
BIND( if ( !?doesItemBelongToUserContextItemClass , ?defaultNoUserContext
,if(bound(?weight), ?weight, ?defaultNoUserContext)) AS ?userContextWeight)
}
________________________________________
From: Ania david <ania_david_1987_pol...@outlook.com>
Sent: Wednesday, May 18, 2016 10:39:06 AM
To: users@jena.apache.org
Subject: Fuseki null pointer exception with minimum data
Hello,
I have a small data, which I uploaded for you on this link
http://www.mediafire.com/download/0bv89wfc65a50sl/data.ttl
data.ttl<http://www.mediafire.com/download/0bv89wfc65a50sl/data.ttl>
www.mediafire.com
MediaFire is a simple to use free service that lets you put all your photos,
documents, music, and video in a single place so you can access them anywhere
and share them everywhere.
and when I apply the query that I uploaded for you on this link
http://www.mediafire.com/download/bjz4zpnj0220szz/query.sparql
I am working with fuseki apache-jena-fuseki-2.4.0
Fuseki gives me this error:
java.lang.NullPointerException
at
org.apache.jena.sparql.engine.binding.BindingBase.hashCode(BindingBase.java:203)
at
org.apache.jena.sparql.engine.binding.BindingBase.hashCode(BindingBase.java:183)
at java.util.HashMap.hash(HashMap.java:338)
at java.util.HashMap.containsKey(HashMap.java:595)
at java.util.HashSet.contains(HashSet.java:203)
at
org.apache.jena.sparql.engine.iterator.QueryIterDistinct.getInputNextUnseen(QueryIterDistinct.java:106)
at
org.apache.jena.sparql.engine.iterator.QueryIterDistinct.hasNextBinding(QueryIterDistinct.java:70)
at
org.apache.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:111)
at
org.apache.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:39)
at
org.apache.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:111)
at
org.apache.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:39)
at
org.apache.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:111)
at
org.apache.jena.sparql.engine.ResultSetStream.hasNext(ResultSetStream.java:74)
at
org.apache.jena.sparql.engine.ResultSetCheckCondition.hasNext(ResultSetCheckCondition.java:59)
at
org.apache.jena.sparql.resultset.ResultSetApply.apply(ResultSetApply.java:38)
at org.apache.jena.sparql.resultset.JSONOutput.format(JSONOutput.java:34)
at
org.apache.jena.query.ResultSetFormatter.outputAsJSON(ResultSetFormatter.java:500)
at
org.apache.jena.fuseki.servlets.ResponseResultSet$2.output(ResponseResultSet.java:211)
at
org.apache.jena.fuseki.servlets.ResponseResultSet.output(ResponseResultSet.java:303)
at
org.apache.jena.fuseki.servlets.ResponseResultSet.jsonOutput(ResponseResultSet.java:229)
at
org.apache.jena.fuseki.servlets.ResponseResultSet.doResponseResultSet$(ResponseResultSet.java:149)
at
org.apache.jena.fuseki.servlets.ResponseResultSet.doResponseResultSet(ResponseResultSet.java:93)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.sendResults(SPARQL_Query.java:396)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.execute(SPARQL_Query.java:272)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.executeWithParameter(SPARQL_Query.java:228)
at
org.apache.jena.fuseki.servlets.SPARQL_Query.perform(SPARQL_Query.java:213)
at
org.apache.jena.fuseki.servlets.ActionSPARQL.executeLifecycle(ActionSPARQL.java:134)
at
org.apache.jena.fuseki.servlets.SPARQL_UberServlet.executeRequest(SPARQL_UberServlet.java:354)
at
org.apache.jena.fuseki.servlets.SPARQL_UberServlet.serviceDispatch(SPARQL_UberServlet.java:315)
at
org.apache.jena.fuseki.servlets.SPARQL_UberServlet.executeAction(SPARQL_UberServlet.java:271)
at
org.apache.jena.fuseki.servlets.ActionSPARQL.execCommonWorker(ActionSPARQL.java:85)
at org.apache.jena.fuseki.servlets.ActionBase.doCommon(ActionBase.java:81)
at
org.apache.jena.fuseki.servlets.FusekiFilter.doFilter(FusekiFilter.java:72)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
at
org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61)
at
org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108)
at
org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137)
at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
at
org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66)
at
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449)
at
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365)
at
org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)
at
org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)
at
org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383)
at
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362)
at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
at
org.apache.jena.fuseki.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:285)
at
org.apache.jena.fuseki.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:248)
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1156)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1088)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:119)
at org.eclipse.jetty.server.Server.handle(Server.java:517)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:306)
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:242)
at
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:245)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
at
org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:75)
at
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:213)
at
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:147)
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
at
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
at java.lang.Thread.run(Thread.java:745)
[2016-05-18 10:20:00] Fuseki INFO [11] 500 Server Error (186 ms)
r
<http://www.mediafire.com/download/bjz4zpnj0220szz/query.sparql>
query.sparql<http://www.mediafire.com/download/bjz4zpnj0220szz/query.sparql>
www.mediafire.com
MediaFire is a simple to use free service that lets you put all your photos,
documents, music, and video in a single place so you can access them anywhere
and share them everywhere.
