Jarql doesn't support federated queries

[alemela]

Trying to put a SERVICE with external endpoint SPARQL I got:

Exception in thread "main" java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V
	at org.apache.commons.logging.impl.SLF4JLocationAwareLog.debug(SLF4JLocationAwareLog.java:133)
	at org.apache.http.impl.conn.PoolingClientConnectionManager.requestConnection(PoolingClientConnectionManager.java:186)
	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:448)
	at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
	at org.apache.http.impl.client.DecompressingHttpClient.execute(DecompressingHttpClient.java:137)
	at org.apache.http.impl.client.DecompressingHttpClient.execute(DecompressingHttpClient.java:118)
	at org.apache.jena.riot.web.HttpOp.exec(HttpOp.java:1108)
	at org.apache.jena.riot.web.HttpOp.execHttpGet(HttpOp.java:385)
	at org.apache.jena.riot.web.HttpOp.execHttpGet(HttpOp.java:447)
	at com.hp.hpl.jena.sparql.engine.http.HttpQuery.execGet(HttpQuery.java:346)
	at com.hp.hpl.jena.sparql.engine.http.HttpQuery.exec(HttpQuery.java:295)
	at com.hp.hpl.jena.sparql.engine.http.Service.exec(Service.java:185)
	at com.hp.hpl.jena.sparql.engine.main.iterator.QueryIterService.nextStage(QueryIterService.java:56)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.makeNextStage(QueryIterRepeatApply.java:110)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding(QueryIterRepeatApply.java:67)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIterProcessBinding.hasNextBinding(QueryIterProcessBinding.java:66)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:40)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:40)
	at com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
	at org.apache.jena.atlas.iterator.Iter$5.hasNext(Iter.java:359)
	at com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execConstruct(QueryExecutionBase.java:216)
	at com.hp.hpl.jena.sparql.engine.QueryExecutionBase.execConstruct(QueryExecutionBase.java:191)
	at io.synapta.jarql.JarqlExecutor.execute(JarqlExecutor.java:84)
	at io.synapta.jarql.JarqlExecutor.main(JarqlExecutor.java:72)