DRL file with a rule having long LHS expression takes very long time to parse ----------------------------------------------------------------------------- Key: DROOLS-982 URL: https://issues.jboss.org/browse/DROOLS-982 Project: Drools Issue Type: Enhancement Reporter: Soumitra Kumar Assignee: Mark Proctor My DRL file is: package sk.rule.ruleset.r1; import sk.event.Event; // Event declaration declare Event @role(event) @timestamp(time) end rule "Long LHS" when $event : Event ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( (contains ("name", "foo") && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) && contains ("name", "foo")) ) then // Empty end // Event definition package sk.event sealed case class Event (time: Long, map: Map [String, String]) { def contains (key: String, value: String): Boolean = false } // Main class package sk.apps import java.io.File import com.typesafe.scalalogging.LazyLogging import org.kie.api.io.ResourceType import org.kie.internal.io.ResourceFactory import org.kie.internal.builder.KnowledgeBuilderFactory object DrlParsing extends LazyLogging { def main (args: Array [String]): Unit = { logger.info (s"Starting KnowledgeBuilder") val kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder () args.foreach { fileName => logger.info (s"Adding file $fileName") kbuilder.add (ResourceFactory.newFileResource (new File (fileName)), ResourceType.DRL) } if (kbuilder.hasErrors ()) logger.error (kbuilder.getErrors ().toString ()) } } The project URL is https://github.com/soumitrak/drl-parsing