[jboss-jira] [JBoss JIRA] Commented: (JBRULES-2477) Time spent in org.mvel2.integration.impl.ClassImportResolverFactory constructor causing transaction timeouts

Time spent in org.mvel2.integration.impl.ClassImportResolverFactory constructor causing transaction timeouts ------------------------------------------------------------------------------------------------------------ Key: JBRULES-2477 URL: https://jira.jboss.org/browse/JBRULES-2477 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-core Affects Versions: 5.0.0.FINAL Reporter: Sam Doyle Assignee: Edson Tirelli Priority: Critical We have hit a critical bottleneck in our application as a result of attempting to execute rules on more facts then we have in the past. I didn't think it was Drools at first but after profiling it is pretty evident that it is. The callgraph is showing 560s in org.mvel2.integration.impl.ClassImportResolverFactory constructor and 152530 calls. This also translates into org.mvel2.integration.impl.SimpleValueResolver constructor 18,454,778 calls for my present case. This is being invoked from the following in CompiledExpression: public Object getValue(Object staticContext, VariableResolverFactory factory) { if (!optimized) setupOptimizers(); if (importInjectionRequired) { return execute(false, this, staticContext, new ClassImportResolverFactory(parserContext.getParserConfiguration(), factory)); } Where importInjectionRequired is almost always going to be true because of: public void setParserContext(ParserContext parserContext) { if ((this.parserContext = parserContext) != null) { this.importInjectionRequired = parserContext.getImports() != null && parserContext.getImports().size() != 0; } } The parsercontext.imports seems to be always greater then 0 and to make matters worse I'm seeing a new Factory not only being created per rule but for the same rule multiple times.