Closed GoogleCodeExporter closed 8 years ago
This usually means that FaCT++ needs more memory for the reasoning than it is
available for it. So , you can treat is as a "Run out of memory" exception.
However,
if you are sure that it is not a case, I'd like to see the ontology(-es) and
what are
you doing with them to check what might it be.
PS. I assume you are using the latest version of FaCT++
Original comment by dmitry.t...@gmail.com
on 15 Oct 2009 at 6:52
Thanks very much for your comments.
I am using FaCTpp-OWLAPI-v1.3.0.1.jar and FaCTpp-win-v1.3.0.zip on Windows XP
pack3.
I run java with '-Xms 128m -Xmx1024m'. After runing my program, I monitored
memory
status with jvisualvm.exe included in JDK package(1.6.0_16). But, my program
pops
the exeception before reaching 1024m, specifically at the moment near 120m.
About what am I doing,-
In constructor, I used following code, it called only one time during program
life
time - manager, reasonerFactory, reasoner are member objects of this class.
private OWLOntologyManager manager;
manager = OWLManager.createOWLOntologyManager();
private OWLReasonerFactory reasonerFactory;
reasonerFactory = new FaCTPlusPlusReasonerFactory();
private OWLReasoner reasoner;
reasoner = reasonerFactory.createReasoner(manager);
And then, executes following pattern of code(called by other object), more than
thousands of times.
pattern: call block 2, whenever finishing block 1. means that at some time,
reasoner
always loads only 1~3 ontologies.
1{
ont = manager.reloadOntology(uri);
Set<OWLOntology> imports = manager.getImportsClosure(ont);
reasoner.loadOntologies(imports);
//some inferences ...(i.e. SubClassOf)
}
2{
reasoner.clearOntologies();
}
Attached files are some parameter of reloadOntology() function.
There are pizza0 ~ pizza99 ontologies. and pizza0-pizza1 includes alignments
between
pizza0 and pizza1. So, there are 100x100 alignments.
Execuse my English, Thanks you.
Original comment by dhkim1...@gmail.com
on 16 Oct 2009 at 4:40
Attachments:
1G for such a big problem is not enough. Increasing the memory by passing
-Xmx4G or so will help.
Original comment by dmitry.t...@gmail.com
on 8 Apr 2015 at 4:40
Original issue reported on code.google.com by
dhkim1...@gmail.com
on 15 Oct 2009 at 8:40