Hi Carmen,
Please post more of the exception stack trace, not enough here for me to
figure anything out. :)
Thanks
--John
On Wed, Jul 2, 2014 at 7:33 AM, <soozandjohny...@gmail.com> wrote:
> Hi Carmen,
>
> Glad that one problem is fixed, and I can take a look at this one as well.
>
> --John
>
> Sent from my iPhone
>
> On Jul 2, 2014, at 6:50 AM, Carmen Manzulli <carmenmanzu...@gmail.com>
> wrote:
>
>
> ok; i've done what you have told me...but now i've got this problem..
>
> ava.lang.Throwable: Child Error
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
> Caused by: java.io.IOException: Task process exit with nonzero status of 1.
> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)
>
> this is my Computation code:
> import org.apache.giraph.GiraphRunner;
> import org.apache.giraph.graph.BasicComputation;
> import org.apache.giraph.graph.Vertex;
> import org.apache.giraph.edge.Edge;
>
> import org.apache.hadoop.io.Text;
> import org.apache.hadoop.io.NullWritable;
> import org.apache.hadoop.util.ToolRunner;
>
>
>
> public class SimpleSelectionComputation extends
> BasicComputation<Text,NullWritable,Text,NullWritable> {
>
>
> @Override
> public void compute(Vertex<Text,NullWritable,Text>
> vertex,Iterable<NullWritable> messages){
>
>
> Text source = new Text("http://dbpedia.org/resource/1040s";);
>
>
> if (getSuperstep()==0)
> {
> if(vertex.getId()==source)
> {
> System.out.println("il soggetto "+vertex.getId()+" ha i
> seguenti predicati e oggetti:");
> for(Edge<Text,Text> e : vertex.getEdges())
>
> {
>
> System.out.println(e.getValue()+"\t"+e.getTargetVertexId());
> }
> }
> vertex.voteToHalt();
> }
>
> }
>
> public static void main(String[] args) throws Exception {
> System.exit(ToolRunner.run(new GiraphRunner(), args));
>
> }
>
>
> }
>
>
