Last modified: 2012-02-11 16:02:35 UTC

Wikimedia Bugzilla is closed!

Wikimedia migrated from Bugzilla to Phabricator. Bug reports are handled in Wikimedia Phabricator.
This static website is read-only and for historical purposes. It is not possible to log in and except for displaying bug reports and their history, links might be broken. See T35687, the corresponding Phabricator task for complete and up-to-date bug report information.
First Last Prev Next    This bug is not in your last search results.
Bug 33687 - Unresolved prefixed name in SPARQL Query
Unresolved prefixed name in SPARQL Query
Status: RESOLVED FIXED
Product: MediaWiki extensions
Classification: Unclassified
Semantic MediaWiki (Other open bugs)
unspecified
All All
: Unprioritized blocker (vote)
: ---
Assigned To: Nobody - You can work on this!
:
Depends on:
Blocks:
  Show dependency tree / graph
 
Reported: 2012-01-12 17:12 UTC by icarnevale
Modified: 2012-02-11 16:02 UTC (History)
2 users (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---

Attachments
Add an attachment (proposed patch, testcase, etc.)

Description icarnevale 2012-01-12 17:12:53 UTC 
Installed software
 - MediaWiki 	1.18.0 (r525)
 - Semantic MediaWiki (Version 1.6.1) 	(r525)


I use SMW whit Joseki as default store.
The configuration in my LocalSettings.php is the following

$smwgDefaultStore = 'SMWSparqlStore';
$smwgSparqlQueryEndpoint = 'http://localhost:8080/joseki/sparql';
$smwgSparqlUpdateEndpoint = 'http://localhost:8080/joseki/update/service';
$smwgSparqlDataEndpoint = ''; # optional location of SPARQL over HTTP service

i have this error on browser while generating SPARQL DELETE query:

Unexpected non-MediaWiki exception encountered, of type "SMWSparqlDatabaseError"
		exception 'SMWSparqlDatabaseError' with message 'A SPARQL query error has occurred
		Query: PREFIX wiki: <http://unbreakable.local/mediawiki/index.php/Special:URIResolver/>
		PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
		PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
		PREFIX owl: <http://www.w3.org/2002/07/owl#>
		PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
		PREFIX property: <http://unbreakable.local/mediawiki/index.php/Special:URIResolver/Property-3A>
		PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
		DELETE { ?s ?p ?o } WHERE { ?s swivt:masterPage state-instances:business_service-609 . ?s ?p ?o }
		Error: Query refused
		Endpoint: http://localhost:8080/joseki/update/service
		HTTP response code: 500
		' in /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/sparql/SMW_SparqlDatabase.php:533
		Stack trace:
		#0 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/sparql/SMW_SparqlDatabase.php(446): SMWSparqlDatabase->throwSparqlErrors('http://localhos...', 'PREFIX wiki: <h...')
		#1 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/sparql/SMW_SparqlDatabase.php(317): SMWSparqlDatabase->doUpdate('PREFIX wiki: <h...')
		#2 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/sparql/SMW_SparqlDatabase.php(337): SMWSparqlDatabase->delete('?s ?p ?o', '?s swivt:master...', Array)
		#3 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/storage/SMW_SparqlStore.php(261): SMWSparqlDatabase->deleteContentByValue('swivt:masterPag...', 'state-instances...')
		#4 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/storage/SMW_SparqlStore.php(66): SMWSparqlStore->deleteSparqlData(Object(SMWExpNsResource))
		#5 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/storage/SMW_Store.php(303): SMWSparqlStore->doDataUpdate(Object(SMWSemanticData))
		#6 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/SMW_ParseData.php(267): SMWStore->updateData(Object(SMWSemanticData))
		#7 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/jobs/SMW_UpdateJob.php(65): SMWParseData::storeData(Object(ParserOutput), Object(Title), false)
		#8 /Evoluzione02/mediawiki/includes/Wiki.php(411): SMWUpdateJob->run()
		#9 /Evoluzione02/mediawiki/includes/Wiki.php(385): MediaWiki->doJobs()
		#10 /Evoluzione02/mediawiki/includes/Wiki.php(627): MediaWiki->finalCleanup()
		#11 /Evoluzione02/mediawiki/includes/Wiki.php(533): MediaWiki->main()
		#12 /Evoluzione02/mediawiki/index.php(57): MediaWiki->run()
		#13 {main}

		#0 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/sparql/SMW_SparqlDatabase.php(446): SMWSparqlDatabase->throwSparqlErrors('http://localhos...', 'PREFIX wiki: <h...')
		#1 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/sparql/SMW_SparqlDatabase.php(317): SMWSparqlDatabase->doUpdate('PREFIX wiki: <h...')
		#2 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/sparql/SMW_SparqlDatabase.php(337): SMWSparqlDatabase->delete('?s ?p ?o', '?s swivt:master...', Array)
		#3 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/storage/SMW_SparqlStore.php(261): SMWSparqlDatabase->deleteContentByValue('swivt:masterPag...', 'state-instances...')
		#4 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/storage/SMW_SparqlStore.php(66): SMWSparqlStore->deleteSparqlData(Object(SMWExpNsResource))
		#5 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/storage/SMW_Store.php(303): SMWSparqlStore->doDataUpdate(Object(SMWSemanticData))
		#6 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/SMW_ParseData.php(267): SMWStore->updateData(Object(SMWSemanticData))
		#7 /Evoluzione02/mediawiki/extensions/SemanticMediaWiki/includes/jobs/SMW_UpdateJob.php(65): SMWParseData::storeData(Object(ParserOutput), Object(Title), false)
		#8 /Evoluzione02/mediawiki/includes/Wiki.php(411): SMWUpdateJob->run()
		#9 /Evoluzione02/mediawiki/includes/Wiki.php(385): MediaWiki->doJobs()
		#10 /Evoluzione02/mediawiki/includes/Wiki.php(627): MediaWiki->finalCleanup()
		#11 /Evoluzione02/mediawiki/includes/Wiki.php(533): MediaWiki->main()
		#12 /Evoluzione02/mediawiki/index.php(57): MediaWiki->run()
		#13 {main}


On Joseki log i have:

PREFIX wiki: <http://unbreakable.local/mediawiki/index.php/Special:URIResolver/>
		PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
		PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
		PREFIX owl: <http://www.w3.org/2002/07/owl#>
		PREFIX swivt: <http://semantic-mediawiki.org/swivt/1.0#>
		PREFIX property: <http://unbreakable.local/mediawiki/index.php/Special:URIResolver/Property-3A>
		PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
		DELETE { ?s ?p ?o } WHERE { ?s swivt:masterPage state-instances:business_service-609 . ?s ?p ?o }"
		 WARN [http-bio-8080-exec-7] (ProcessorBase.java:153) - Internal error - unexpected exception: 
		com.hp.hpl.jena.query.QueryParseException: Line 8, column 49: Unresolved prefixed name: state-instances:business_service-609
			at com.hp.hpl.jena.sparql.lang.ParserBase.throwParseException(ParserBase.java:538)
			at com.hp.hpl.jena.sparql.lang.ParserBase.resolvePName(ParserBase.java:237)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.PrefixedName(ARQParser.java:4958)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.IRIref(ARQParser.java:4942)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GraphTerm(ARQParser.java:3503)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.VarOrTerm(ARQParser.java:3445)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GraphNode(ARQParser.java:3401)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Object(ARQParser.java:2793)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.ObjectList(ARQParser.java:2774)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.PropertyListNotEmptyPath(ARQParser.java:2885)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.TriplesSameSubjectPath(ARQParser.java:2849)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.TriplesBlock(ARQParser.java:2230)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GroupGraphPatternSub(ARQParser.java:2135)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GroupGraphPattern(ARQParser.java:2097)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Modify(ARQParser.java:1693)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Update1(ARQParser.java:1450)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Update(ARQParser.java:1379)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.UpdateUnit(ARQParser.java:1369)
			at com.hp.hpl.jena.sparql.lang.ParserARQUpdate._parse(ParserARQUpdate.java:54)
			at com.hp.hpl.jena.sparql.lang.ParserARQUpdate.parse(ParserARQUpdate.java:45)
			at org.joseki.processors.SPARQLUpdate.execOperation(SPARQLUpdate.java:78)
			at org.joseki.processors.ProcessorBase.exec(ProcessorBase.java:136)
			at org.joseki.ServiceRequest.exec(ServiceRequest.java:36)
			at org.joseki.Dispatcher.dispatch(Dispatcher.java:59)
			at org.joseki.http.Servlet.doCommon(Servlet.java:178)
			at org.joseki.http.ServletUpdate.doPost(ServletUpdate.java:39)
			at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
			at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
			at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
			at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
			at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
			at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
			at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
			at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
			at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
			at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
			at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
			at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
			at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
			at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
			at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304)
			at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
			at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
			at java.lang.Thread.run(Thread.java:722)
		 WARN [http-bio-8080-exec-7] (Servlet.java:183) - Internal server error
		com.hp.hpl.jena.query.QueryParseException: Line 8, column 49: Unresolved prefixed name: state-instances:business_service-609
			at com.hp.hpl.jena.sparql.lang.ParserBase.throwParseException(ParserBase.java:538)
			at com.hp.hpl.jena.sparql.lang.ParserBase.resolvePName(ParserBase.java:237)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.PrefixedName(ARQParser.java:4958)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.IRIref(ARQParser.java:4942)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GraphTerm(ARQParser.java:3503)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.VarOrTerm(ARQParser.java:3445)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GraphNode(ARQParser.java:3401)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Object(ARQParser.java:2793)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.ObjectList(ARQParser.java:2774)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.PropertyListNotEmptyPath(ARQParser.java:2885)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.TriplesSameSubjectPath(ARQParser.java:2849)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.TriplesBlock(ARQParser.java:2230)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GroupGraphPatternSub(ARQParser.java:2135)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.GroupGraphPattern(ARQParser.java:2097)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Modify(ARQParser.java:1693)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Update1(ARQParser.java:1450)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.Update(ARQParser.java:1379)
			at com.hp.hpl.jena.sparql.lang.arq.ARQParser.UpdateUnit(ARQParser.java:1369)
			at com.hp.hpl.jena.sparql.lang.ParserARQUpdate._parse(ParserARQUpdate.java:54)
			at com.hp.hpl.jena.sparql.lang.ParserARQUpdate.parse(ParserARQUpdate.java:45)
			at org.joseki.processors.SPARQLUpdate.execOperation(SPARQLUpdate.java:78)
			at org.joseki.processors.ProcessorBase.exec(ProcessorBase.java:136)
			at org.joseki.ServiceRequest.exec(ServiceRequest.java:36)
			at org.joseki.Dispatcher.dispatch(Dispatcher.java:59)
			at org.joseki.http.Servlet.doCommon(Servlet.java:178)
			at org.joseki.http.ServletUpdate.doPost(ServletUpdate.java:39)
			at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
			at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
			at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
			at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
			at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
			at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
			at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
			at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
			at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
			at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
			at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
			at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
			at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
			at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
			at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304)
			at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
			at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
			at java.lang.Thread.run(Thread.java:722)

The problem is that in the PREFIX list i don't have the "state-instances" prefix.

In SMW_SparqlDatabase.php the method 
public function delete( $deletePattern, $where, $extraNamespaces = array() ) 
"extraNamespaces" that is an array (associative) of namespaceId => namespaceUri, 
and it contains prefix different from wiki, swivt, rdf, owl, rdfs, property, xsd.


The method 
SMW_SparqlStore.php:deleteSparqlData( SMWExpResource $expResource )
invoke SMW_SparqlDatabase.php:delete like

smwfGetSparqlDatabase()->delete( "$resourceUri ?p ?o", "$resourceUri ?p ?o" );

and "extraNamespaces" isn't in the parameters list.

Solution:
1) Fill extraNamespaces int he following way

	$extraNamespaces = array();
	$extraNamespaces[$expResource->getNamespaceId()]=$expResource->getNamespace();

2) Pass the filled array to SMW_SparqlDatabase.php:delete method like

	smwfGetSparqlDatabase()->delete( "$resourceUri ?p ?o", "$resourceUri ?p ?o", $extraNamespaces );


and the result is

/**
 * Delete from the SPARQL database all data that is associated with the
 * given resource.
 *
 * @param $expResource SMWExpResource
 * @return boolean success
 */
protected function deleteSparqlData( SMWExpResource $expResource ) {
        $resourceUri = SMWTurtleSerializer::getTurtleNameForExpElement( $expResource );
        $masterPageProperty = SMWExporter::getSpecialNsResource( 'swivt', 'masterPage' );
        $masterPagePropertyUri = SMWTurtleSerializer::getTurtleNameForExpElement( $masterPageProperty );
        $extraNamespaces = array();
        $extraNamespaces[$expResource->getNamespaceId()]=$expResource->getNamespace();
        $success = smwfGetSparqlDatabase()->deleteContentByValue( $masterPagePropertyUri, $resourceUri, $extraNamespaces );
        if ( $success ) {
                return smwfGetSparqlDatabase()->delete( "$resourceUri ?p ?o", "$resourceUri ?p ?o", $extraNamespaces );
        } else {
                return false;
        }
}
Comment 1 Markus Krötzsch 2012-02-11 16:02:35 UTC 
Thanks for the detailed report. Fixed in r111243 in the way you suggested.

As a side remark (not related to this bug, but maybe a new bug/request ...), I note that custom URIs will not work well with the SPARQL backend in general. You should not be able to retrieve pages with custom URIs (using "vocabulary import") in #ask queries, since SMW has no way of translating custom URIs (retrieved by SPARQL) back into wiki pages. Anyway, custom URIs should still not lead to critical errors, so it is good that this bug is fixed now.
Note You need to log in before you can comment on or make changes to this bug.
First Last Prev Next    This bug is not in your last search results.

Navigation
Links