Re: Problems when connect and query data from DBPedia online.

[Olivier Rossel]

Could you please try the same code with this SPARQL query instead:
select * WHERE {<http://dbpedia.org/resource/Beijing> ?p ?o.} limit 100


On Fri, Apr 11, 2014 at 11:36 AM, Wang Dongsheng <dswang2...@gmail.com>wrote:

> Hi all,
> I want to query data from dbpedia, but meet the exception as following. I
> think it a common effort that we use often.
>  I hope anyone can help me.
>
> --------------------------------main code ------------------
> String queryStr = "select * {<http://dbpedia.org/resource/Beijing> ?p ?o.}
> limit 100";
>  QueryExecution qexec = QueryExecutionFactory.sparqlService("
> http://dbpedia.org/sparql";, queryStr);
> ResultSet results = qexec.execSelect();
>
> -------------------------------------------------------------------
>
>
> --------------------------------------Exception-------------------------
>
> log4j:WARN No appenders could be found for logger
> (com.hp.hpl.jena.util.FileManager).
> log4j:WARN Please initialize the log4j system properly.
> log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for
> more info.
> Exception in thread "main" HttpException: java.net.SocketException:
> Software caused connection abort: recv failed: java.net.SocketException:
> Software caused connection abort: recv failed
> at
> com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:529)
>  at
> com.hp.hpl.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java:289)
> at com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:240)
>  at
>
> com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngineHTTP.java:302)
> at com.wds.ttl.OnlineQuery.demo(OnlineQuery.java:59)
>  at com.wds.ttl.OnlineQuery.main(OnlineQuery.java:39)
> Caused by: java.net.SocketException: Software caused connection abort: recv
> failed
> at java.net.SocketInputStream.socketRead0(Native Method)
>  at java.net.SocketInputStream.read(SocketInputStream.java:173)
> at java.net.SocketInputStream.read(SocketInputStream.java:122)
>  at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
> at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
>  at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
> at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:687)
>  at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
> at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:658)
>  at
>
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1323)
> at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:468)
>  at
> com.hp.hpl.jena.sparql.engine.http.HttpQuery.execCommon(HttpQuery.java:412)
> ... 5 more
>
> ----------------------------------------
>
> If there is any links related to the similar problem, please send to me?
> Thanks in advance!
>