Luis, Did you solve this problem? Did you try setting the -Xmx property on the Java command line? I don't recall what the default is but you could set it to something like -Xmx:1g to allocate 1 gig of memory.
Claude On Wed, Feb 5, 2020 at 12:24 PM Luis Enrique Ramos García <luisenriqueramos1...@googlemail.com.invalid> wrote: > > > > Dear members of jena community > > > > I am working with two ontologies, merged in a model, the size of the > ontologies is as follows: > > *ontology1* 2,7 Mbytes, 25K axioms and 6000 individuals > > *ontology2* 8,1 Mbytes, 72 K axioms, and 9000 items, > > I implemented a rule that checks if an item of o1 has the same label of an > item of o2, with a generic rule reasoner of jena > > when I use less items in ontology 2, 3000 and 6000 i get the result in 7,2 > and 21, sec, but with 9000 items, I get the following error: > > Exception in thread "main" java.lang.OutOfMemoryError: Java heap space > at > > org.apache.jena.reasoner.rulesys.impl.BindingVectorMultiSet.getSubSet(BindingVectorMultiSet.java:144) > at org.apache.jena.reasoner.rulesys.impl.RETEQueue.fire(RETEQueue.java:114) > at org.apache.jena.reasoner.rulesys.impl.RETEQueue.fire(RETEQueue.java:128) > at org.apache.jena.reasoner.rulesys.impl.RETEQueue.fire(RETEQueue.java:128) > at > > org.apache.jena.reasoner.rulesys.impl.RETEClauseFilter.fire(RETEClauseFilter.java:227) > at > > org.apache.jena.reasoner.rulesys.impl.RETEEngine.inject(RETEEngine.java:492) > at > > org.apache.jena.reasoner.rulesys.impl.RETEEngine.runAll(RETEEngine.java:474) > at > > org.apache.jena.reasoner.rulesys.impl.RETEEngine.fastInit(RETEEngine.java:163) > at > > org.apache.jena.reasoner.rulesys.FBRuleInfGraph.prepare(FBRuleInfGraph.java:471) > at > > org.apache.jena.reasoner.rulesys.BasicForwardRuleInfGraph.getDeductionsGraph(BasicForwardRuleInfGraph.java:392) > at > > org.apache.jena.rdf.model.impl.InfModelImpl.getDeductionsModel(InfModelImpl.java:169) > > > My question is if there is a way to solve this memory issue in jena side?, > given that the available memory of my computer is 1,2 gb, and I think that > should not be the cause, however I could be wrong. > > Any support is thanked > > > Luis Ramos > -- I like: Like Like - The likeliest place on the web <http://like-like.xenei.com> LinkedIn: http://www.linkedin.com/in/claudewarren
