[rules-users] Reading DRL file with large number of rules

Hello, We are trying to run a DRL file that has more than 20K rules, all of which have the simple form: rule "testpeoplenumber" salience 100 dialect "mvel" when LineItem( inventoryItemCode == "8903210392090") then InventoryItem fact0 = new InventoryItem(); fact0.setCategoryCode( "ONPROMO" ); insert(fact0 ); end However, the rule file is not getting parsed by the builder, and either takes a very long time (well over half an hour), or gives a Heap Overflow exception. We tried with a smaller file (about 1K rules, and the situation is the same). The parsing code is: org.drools.KnowledgeBaseConfiguration kbc = org.drools.KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null, cl); org.drools.KnowledgeBase kbase = org.drools.KnowledgeBaseFactory.newKnowledgeBase(kbc); org.drools.builder.KnowledgeBuilderConfiguration knowledgeBuilderConfig = org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null, cl); org.drools.builder.KnowledgeBuilder builder = org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(kbase, knowledgeBuilderConfig); org.drools.builder.impl.KnowledgeBuilderImpl builderImpl = builder as org.drools.builder.impl.KnowledgeBuilderImpl; builder.add(org.drools.io.ResourceFactory.newFileResource(filename), org.drools.builder.ResourceType.DRL); We are using Drools v5. We've tried both with the java jar as well as in .NET (using IKVM to compile it). Any help in understanding why this is happening and how it can be avoided will be appreciated. Warm Regards Krishna. -- http://kpowerinfinity.wordpress.com http://www.linkedin.com/in/kpowerinfinity