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Automatically exported from code.google.com/p/h2rdf
What steps will reproduce the problem?
-->hadoop jar H2RDF_server.jar sampler.SamplerEx input_Path HBaseTable
What is the expected output? What do you see instead?
-->hadoop job is ok.but when import hbase table,the information below showed
--------------------
14/04/01 23:35:32 WARN ipc.HBaseClient: Unexpected exception receiving call
responses
java.lang.OutOfMemoryError: Java heap space
at java.lang.reflect.Array.newArray(Native Method)
at java.lang.reflect.Array.newInstance(Array.java:52)
at org.apache.hadoop.hbase.io.HbaseObjectWritable.readObject(HbaseObjectWritable.java:542)
at org.apache.hadoop.hbase.io.HbaseObjectWritable.readFields(HbaseObjectWritable.java:289)
at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.receiveResponse(HBaseClient.java:593)
at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:505)
-----------
What version of the product are you using? On what operating system?
1.i install hadoop-1.0.1 and hbase-0-92.0 and zookeeper-3.3.2;
2.install h2rdf 0.3
Please provide any additional information below.
>
Original issue reported on code.google.com by [email protected]
on 1 Apr 2014 at 3:59
Hi,
Can you please give us more details about the manipulation of RDF data stored on H2RDF and the jena java Framework (load data through jena, inference) ?
Best Regards,
Hiba
Hi,
Can we run H2RDF on top of cloudera 5.13 (Hadoop 2.6.0) ?
Best Regards,
Hiba
What steps will reproduce the problem?
1.The current hadoop and hbase configuration is pseudo distributed mode.
2. The code which was said to be run is from partialJoin.Ex2.java which
contained commented lines which demonstrated the mapreduce operation, which we
later uncommented for execution.
3. We also commented mapred.fairscheduler.pool configuration lines to disable
the pool name as we use the default one.
4. When the algorithm is set to 'map reduce' by using 1, we are getting FATAL
org.apache.hadoop.mapred.Child: Error running
child:java.lang.noClassDefFoundError: javaewah/EWAHCompressedBitmap
5. The data is generated using
gr.ntua.h2rdf.examples.HbaseSequentialImportExample in H2RDF client. The
following code is used for generating:
for (int i = 1; i < 10; i++) {
Node s = Node.createURI("<"+d0_0+"GraduateStudent"+i+">");
Node p = Node.createURI("<"+rdf+"type"+">");
Node o = Node.createURI("<"+arco+"term"+">");
Triple triple = Triple.create(s, p, o);
store.add(triple);
s=Node.createURI("<"+d0_0+"GraduateStudent"+i+">");
p=Node.createURI("<"+arco+"kyotoDomainRelevance"+">"); o=Node.createURI("\"8
0\"^^<http://www.w3.org/2001/XMLSchema#double>"); triple=Triple.create(s, p,
o);
store.add(triple);
s=Node.createURI("<"+d0_0+"GraduateStudent"+i+">"); p=Node.createURI("<http:
//www.w3.org/2000/01/rdf-schema#label>");
o=Node.createURI("<"+d0_0+"Label"+i+">"); triple=Triple.create(s, p,
o); store.add(triple);
}
What is the expected output? What do you see instead?
The query I am using is in partialJoin.Ex2.java:
String prolog = "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>"+
"PREFIX arco: <http://www.gate.ac.uk/ns/ontologies/arcomem-data-model.rdf#>" +
"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>";
String NL = System.getProperty("line.separator") ;
String q = prolog + NL +
"SELECT ?termInstance ?score ?termLabel " +
"WHERE { ?termInstance rdf:type arco:Term . " +
"?termInstance arco:kyotoDomainRelevance ?score ." +
"?termInstance rdfs:label ?termLabel . " +
" }";
As you can see, I am expecting the entire table contents to be viewed but the
map reduce itself is not working.
What version of the product are you using? On what operating system?
The OS used is RHEL6.0 and the hbase used is 0.92.0 while hadoop is 0.20.205.0
and zookeper is 3.4.3. We tried to use javaewah 0.5.2 version instead of 0.3.2
for trying to resolve the run time error. And also added the jar for javaewah
in hadoop and hbase folders which we are using just in case it was searching
for the jar in those lib directories and was unable to find it.
Please provide any additional information below.
I have attached the stacktrace error as well as the Ex2.java program that we
are using.
Kindly let us know what exactly we are supposed to do to execute map reduce
job.
Original issue reported on code.google.com by [email protected]
on 5 Nov 2012 at 3:51
Attachments:
Hi niko,
I want to install h2rdf-0.2 on Rhel6.
I didn't get proper document having h2rdf configuration details.please help me
on this issue.
my mail id: [email protected]
Thanks,
Yerriswamy.A
Original issue reported on code.google.com by [email protected]
on 22 Sep 2012 at 6:06
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