On 03/12/13 08:32, Andy Seaborne wrote: > 500 is "Internal Server", an error from the server that means it went > wrong. Without any more information, it is impossible to say why. > > Try other queries, both with and without SERVICE to see if anything > works at all. Try also querying > http://wifo5-04.informatik.uni-mannheim.de/sider/sparq directly. > > The standard installation of Fuseki logs all requests and errors at the > server. If /drugbank/sparql has changed that, then I suggest undoing > the change. >
http://wifo5-04.informatik.uni-mannheim.de/drugbank/sparql and .../sider/sparql are both Joseki server (v3.4.4) , not Fuseki. The SPARQL engine is very out of date. Andy > Andy > > > On 03/12/13 03:35, June wrote: >> Hi Andy, >> >> I tried to configure log4j but failed, and I want to leave it at the >> moment ... >> >> I debugged the codes, and I found that in QueryEngineHTTP.execSelect >> method, the HTTPQuery actually is >> >> "http://wifo5-04.informatik.uni-mannheim.de/drugbank/sparql?query=PREFIX++drugbank%3A+%3Chttp%3A%2F%2Fwifo5-04.informatik.uni-mannheim.de%2Fdrugbank%2Fresource%2Fdrugbank%2F%3E%0APREFIX++sider%3A+%3Chttp%3A%2F%2Fwifo5-04.informatik.uni-mannheim.de%2Fsider%2Fresource%2Fsider%2F%3E%0APREFIX++owl%3A++%3Chttp%3A%2F%2Fwww.w3.org%2F2002%2F07%2Fowl%23%3E%0APREFIX++rdf%3A++%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E%0A%0ASELECT++%3Fdrug+%3Fenzyme+%3FsideEffect%0AWHERE%0A++%7B+%3Fdrug+rdf%3Atype+drugbank%3Adrugs+.%0A++++%3Fdrug+drugbank%3Aenzyme+%3Fenzyme+.%0A++++%3Fenzyme+rdf%3Atype+drugbank%3Aenzymes%0A++++SERVICE+%3Chttp%3A%2F%2Fwifo5-04.informatik.uni-mannheim.de%2Fsider%2Fsparql%3E%0A++++++%7B+%3FdrugInSider+owl%3AsameAs+%3Fdrug+.%0A++++++++%3FdrugInSider+rdf%3Atype+sider%3Adrugs+.%0A++++++++%3FdrugInSider+sider%3AsideEffect+%3FsideEffect+.%0A++++++++%3FsideEffect+rdf%3Atype+sider%3Aside_effects%0A++++++%7D%0A++%7D%0ALIMIT+++10%0A&timeout=10000"; >> >> which is simply transformed from the SPARQL query I wrote. If I open it >> in a web browser, "HTTP ERROR 500" appears. >> >> It seems that the query is sent to one single endpoint which doesn't >> support this SERVICE extension, instead of sending subqueries to >> different SPARQL endpoints (which I guess is the way this SERVICE >> extension works). >> >> So I guess maybe the codes I wrote are incorrect, but I didn't find the >> correct way to do it. Could you please give me some helps? Many thanks >> for that! >> >> Best wishes, >> >> June >> >> On 12/03/2013 02:09 AM, Andy Seaborne wrote: >>> On 02/12/13 16:37, zhuman.private wrote: >>>> Hi Andy, >>>> >>>> Sorry for the confusions. >>>> http://wifo5-04.informatik.uni-mannheim.de/drugbank/sparql is a SPARQL >>>> endpoint, so is http://wifo5-04.informatik.uni-mannheim.de/sider/sparql. >>>> I tried queries separately on the two end points, and both of them are >>>> working well. But not when querying on both of them. >>>> >>>> best regards >>>> June >>> June, >>> >>> What are the messages (and stacktrace) from the server log files? >>> >>> Andy >>> >>>>> 在 2013年12月2日，23:26，Andy Seaborne <[email protected]> 写道： >>>>> >>>>>> On 02/12/13 14:33, June wrote: >>>>>> Dear list, >>>>>> >>>>>> I am trying to perform a federated SPARQL query by Jena arq for the >>>>>> first time, and I am using the latest version of Jena. >>>>>> >>>>>> But I encountered a HTTPException:500 exception for executing the >>>>>> following query. It will be very helpful if you can give me some tips >>>>>> about this problem. >>>>> What is http://wifo5-04.informatik.uni-mannheim.de/drugbank/sparql >>>>> running? Is it Jena or another system? >>>>> >>>>> If it's Fuseki, what are the messages (and stacktrace) from the server >>>>> log file? >>>>> >>>>> Andy >>>>> >>>>>> PREFIX drugbank: >>>>>> <http://wifo5-04.informatik.uni-mannheim.de/drugbank/resource/drugbank/> >>>>>> PREFIX sider: >>>>>> <http://wifo5-04.informatik.uni-mannheim.de/sider/resource/sider/> >>>>>> PREFIX owl: <http://www.w3.org/2002/07/owl#> >>>>>> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> >>>>>> >>>>>> SELECT ?drug ?enzyme >>>>>> WHERE >>>>>> { ?drug rdf:type drugbank:drugs . >>>>>> ?drug drugbank:enzyme ?enzyme . >>>>>> ?enzyme rdf:type drugbank:enzymes >>>>>> SERVICE <http://wifo5-04.informatik.uni-mannheim.de/sider/sparql> >>>>>> { ?drugInSider owl:sameAs ?drug . >>>>>> ?drugInSider rdf:type sider:drugs . >>>>>> ?drugInSider sider:sideEffect ?sideEffect . >>>>>> ?sideEffect rdf:type sider:side_effects >>>>>> } >>>>>> } >>>>>> LIMIT 10 >>>>>> >>>>>> The codes I am using are: >>>>>> >>>>>> val query = QueryFactory.create(qStr) >>>>>> val qexec = >>>>>> QueryExecutionFactory.sparqlService("http://wifo5-04.informatik.uni-mannheim.de/drugbank/sparql";, >>>>>> query) >>>>>> try { >>>>>> val results = qexec.execSelect() >>>>>> while (results.hasNext()) { >>>>>> val result = results.next >>>>>> println(result.get("drug") + "\t" + result.get("enzyme"))// + >>>>>> "\t" + result.get("sideEffect")) >>>>>> } >>>>>> } finally { >>>>>> qexec.close(); >>>>>> } >>>>>> >>>>>> Many thanks! >>>>>> >>>>>> Best wishes, >>>>>> >>>>>> June >> >> >
