I was using ext4:
/etc/mtab ==>
/dev/sda1 / ext4 rw,errors=remount-ro,user_xattr,commit=0 0 0
(default when I installed Ubuntu).
What is the mtab entry for your setup?
Andy
On 20/06/11 20:30, Andy Seaborne wrote:
Hi there,
I tried to recreate this but couldn't, but I don't have an SSD to hand
at the moment (being fixed :-)
I've put my test program and the data from the jamendo-rdf you sent me in:
http://people.apache.org/~andy/
so we can agree on exactly a test case. This code is single threaded.
The conversion from .rdf to .nt wasn't pure.
I tried running using the in-memory store as well.
downloads.dbpedia.org was down atthe weekend - I'll try to get the same
dbpedia data.
Could you run exactly what I was running? The file name needs changing.
You can also try uncommenting
SystemTDB.setFileMode(FileMode.direct) ;
and run it using non-mapped files in about 1.2 G of heap.
Looking through the stacktarce, there is a point where the code has
passed an internal consistence test then fails with something that
should be caught by that test - and the code is sync'ed or single
threaded. This is, to put it mildly, worrying.
Andy
On 18/06/11 16:38, jp wrote:
Hey Andy,
My entire program is run on one jvm as follows.
public static void main(String[] args) throws IOException{
DatasetGraphTDB datasetGraph = TDBFactory.createDatasetGraph(tdbDir);
/* I saw the BulkLoader had two ways of loading data based on whether
the dataset existed already. I did two runs one with the following two
lines commented out to test both ways the BulkLoader runs. Hopefully
this had the desired effect. */
datasetGraph.getDefaultGraph().add(new
Triple(Node.createURI("urn:hello"), RDF.type.asNode(),
Node.createURI("urn:house")));
datasetGraph.sync();
InputStream inputStream = new FileInputStream(dbpediaData);
BulkLoader bulkLoader = new BulkLoader();
bulkLoader.loadDataset(datasetGraph, inputStream, true);
}
The data can be found here
http://downloads.dbpedia.org/3.6/en/mappingbased_properties_en.nt.bz2
I appended the ontology to end of file it can be found here
http://downloads.dbpedia.org/3.6/dbpedia_3.6.owl.bz2
The tdbDir is an empty directory.
On my system the error starts occurring after about 2-3minutes and
8-12 million triples loaded.
Thanks for looking over this and please let me know if I can be of
further assistance.
-jp
[email protected]
On Jun 17, 2011 9:29 am, andy wrote:
jp,
How does this fit with running:
datasetGraph.getDefaultGraph().add(new
Triple(Node.createURI("urn:hello"), RDF.type.asNode(),
Node.createURI("urn:house")));
datasetGraph.sync();
Is the preload of one triple a separate JVM or the same JVM as the
BulkLoader call - could you provide a single complete minimal example?
In attempting to reconstruct this, I don't want to hide the problem by
guessing how things are wired together.
Also - exactly which dbpedia file are you loading (URL?) although I
doubt the exact data is the cause here.
