[
https://issues.apache.org/jira/browse/JENA-576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15568105#comment-15568105
]
ASF GitHub Bot commented on JENA-576:
-------------------------------------
Github user afs commented on the issue:
https://github.com/apache/jena/pull/151
This
```
HttpClient hc = HttpOp.createPoolingHttpClient() ;
HttpOp.setDefaultHttpClient(hc);
String queryString = "SELECT * { ?s ?p ?o }" ;
String service = "http://sparql.org/books/sparql"; ;
Query query = QueryFactory.create(queryString) ;
QueryExecution qExec = QueryExecutionFactory.sparqlService(service,
query) ;
QueryExecUtils.executeQuery(qExec);
```
causes this:
```
Exception in thread "main" java.lang.UnsupportedOperationException
at
org.apache.http.impl.client.InternalHttpClient.getParams(InternalHttpClient.java:210)
at
org.apache.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java:325)
at org.apache.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:292)
at
org.apache.jena.sparql.engine.http.QueryEngineHTTP.execResultSetInner(QueryEngineHTTP.java:362)
at
org.apache.jena.sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngineHTTP.java:354)
at
org.apache.jena.sparql.util.QueryExecUtils.doSelectQuery(QueryExecUtils.java:196)
at
org.apache.jena.sparql.util.QueryExecUtils.executeQuery(QueryExecUtils.java:78)
at
org.apache.jena.sparql.util.QueryExecUtils.executeQuery(QueryExecUtils.java:66)
at
org.apache.jena.sparql.util.QueryExecUtils.executeQuery(QueryExecUtils.java:62)
at dev.DevMain.main(DevMain.java:65)
```
because `HttpQuery` does this:
```
private void selectClient() {
// May use configured default client where appropriate
this.client = HttpOp.getDefaultHttpClient();
```
> Upgrade Apache HTTP Client to 4.3
> ---------------------------------
>
> Key: JENA-576
> URL: https://issues.apache.org/jira/browse/JENA-576
> Project: Apache Jena
> Issue Type: Dependency upgrade
> Components: ARQ
> Affects Versions: Jena 2.11.0
> Reporter: Rob Vesse
> Assignee: Rob Vesse
> Priority: Minor
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> As of 2.11.0 ARQ centralizes all HTTP operations through HttpOp which relies
> on Apache HTTP Client. Currently we are using 4.2.3 while the latest stable
> release is actually 4.3.1
> Therefore we should look at upgrading our code to use the latest version
> which may entail some refactoring since there appears to have been some
> breaking changes across the minor version bump which users have seen in usage
> - e.g.
> https://github.com/pyvandenbussche/sparqles/issues/9#issuecomment-27220738
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