That codes OK - it uses transactions.
Are you starting with a fresh database or an existing one with some data?
Andy
On 03/03/2020 14:45, Diptendu Dutta wrote:
The code that is used to populate the database is given below.
It is called in side a FOR loop. Why is the database getting corrupted?
static public void writeTriple(String corpus_file_id, String subject,
String predicate, String object) {
dataset.begin(ReadWrite.WRITE) ;
Model model = null;
try {
model = dataset.getNamedModel(corpus_file_id);
Resource subjectResource = model.createResource(ns.concat(subject));
Property property = model.createProperty(ns.concat(predicate));
Resource objectResource = model.createResource(ns.concat(object));
model.add(subjectResource, property, objectResource);
Statement statement = model.createStatement(subjectResource,
property, objectResource);
model.add(statement);
model.close();
dataset.commit();
}
catch(Exception ex) {
ex.printStackTrace();
}
finally {
dataset.end();
}
}
I can see that the database has been created:
image.png
On Tue, Mar 3, 2020 at 7:40 PM Andy Seaborne <a...@apache.org
<mailto:a...@apache.org>> wrote:
It looks like previously you were using the database withotu
transactions and didn't shutdown cleanly.
The database has been corrupted. You'll need to rebuild it.
The code below is fine - the problem happened beforehand and is only
now
showing up.
Andy
On 03/03/2020 14:01, Diptendu Dutta wrote:
> I am getting java.lang.StringIndexOutOfBoundsException while writing
> RDF from a model (model.write()). I have tried with other mechanisms
> such as RDFWriter, RDFDataMgr but I get exactly the same error.
> Here is the code:
>
> static public String getRDF(String corpus_file_id) {
>
> String rdfString = null;
>
> Model model = null;
>
> dataset.begin(ReadWrite.READ) ;
>
> try {
> model = dataset.getNamedModel(corpus_file_id);
> model.write(System.out, "RDF/XML");
> } catch (Exception e) {
> // TODO Auto-generated catch block
> e.printStackTrace();
> }finally {
> model.close();
> dataset.end();
> }
> return rdfString;
> }
>
> java.lang.StringIndexOutOfBoundsException: String index out of
range: 46
> at java.lang.String.charAt(String.java:658)
> at org.apache.jena.atlas.lib.StrUtils.decodeHex(StrUtils.java:212)
> at
org.apache.jena.tdb.store.nodetable.NodecSSE.decode(NodecSSE.java:121)
> at org.apache.jena.tdb.lib.NodeLib.decode(NodeLib.java:120)
> at org.apache.jena.tdb.lib.NodeLib.fetchDecode(NodeLib.java:97)
> at
>
org.apache.jena.tdb.store.nodetable.NodeTableNative.readNodeFromTable(NodeTableNative.java:182)
> at
>
org.apache.jena.tdb.store.nodetable.NodeTableNative._retrieveNodeByNodeId(NodeTableNative.java:108)
> at
>
org.apache.jena.tdb.store.nodetable.NodeTableNative.getNodeForNodeId(NodeTableNative.java:67)
> at
>
org.apache.jena.tdb.store.nodetable.NodeTableCache._retrieveNodeByNodeId(NodeTableCache.java:128)
> at
>
org.apache.jena.tdb.store.nodetable.NodeTableCache.getNodeForNodeId(NodeTableCache.java:82)
> at
>
org.apache.jena.tdb.store.nodetable.NodeTableWrapper.getNodeForNodeId(NodeTableWrapper.java:50)
> at
>
org.apache.jena.tdb.store.nodetable.NodeTableInline.getNodeForNodeId(NodeTableInline.java:67)
> at org.apache.jena.tdb.lib.TupleLib.quad(TupleLib.java:126)
> at org.apache.jena.tdb.lib.TupleLib.quad(TupleLib.java:120)
> at
>
org.apache.jena.tdb.lib.TupleLib.lambda$convertToQuads$3(TupleLib.java:59)
> at org.apache.jena.atlas.iterator.Iter$2.next(Iter.java:352)
> at org.apache.jena.atlas.iterator.Iter$2.next(Iter.java:352)
> at org.apache.jena.atlas.iterator.Iter.next(Iter.java:1072)
> at
>
org.apache.jena.util.iterator.WrappedIterator.next(WrappedIterator.java:94)
> at
org.apache.jena.util.iterator.Map1Iterator.next(Map1Iterator.java:46)
> at
org.apache.jena.util.iterator.NiceIterator.asSet(NiceIterator.java:208)
> at
org.apache.jena.util.iterator.NiceIterator.toSet(NiceIterator.java:199)
> at org.apache.jena.graph.GraphUtil.listPredicates(GraphUtil.java:66)
> at
org.apache.jena.rdf.model.impl.ModelCom.listPredicates(ModelCom.java:999)
> at
>
org.apache.jena.rdf.model.impl.ModelCom.listNameSpaces(ModelCom.java:1012)
> at
>
org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.addNameSpaces(BaseXMLWriter.java:219)
> at
>
org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.setupNamespaces(BaseXMLWriter.java:488)
> at
>
org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.write(BaseXMLWriter.java:470)
> at
>
org.apache.jena.rdfxml.xmloutput.impl.BaseXMLWriter.write(BaseXMLWriter.java:460)
> at
>
org.apache.jena.riot.adapters.AdapterRDFWriter.write(AdapterRDFWriter.java:64)
> at org.apache.jena.riot.RDFWriter.write$(RDFWriter.java:202)
> at org.apache.jena.riot.RDFWriter.output(RDFWriter.java:161)
> at org.apache.jena.riot.RDFWriter.output(RDFWriter.java:112)
> at
org.apache.jena.riot.RDFWriterBuilder.output(RDFWriterBuilder.java:205)
> at
org.apache.jena.riot.adapters.RDFWriterRIOT.write(RDFWriterRIOT.java:86)
> at org.apache.jena.rdf.model.impl.ModelCom.write(ModelCom.java:379)
> at knowledgegraph.JenaProcessor.getRDF(JenaProcessor.java:89)
>
