[jboss-jira] [JBoss JIRA] Updated: (JBRULES-2284) OutOfMemoryException at DT loading

OutOfMemoryException at DT loading ---------------------------------- Key: JBRULES-2284 URL: https://issues.jboss.org/browse/JBRULES-2284 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-decisiontables Affects Versions: 5.0.1.FINAL Environment: Core2Quad Windows XP Pro 64 Reporter: Sergey Vanskov Assignee: Michael Anstis Fix For: 5.2.0.CR2 Attachments: benchmark20000.csv I have created DT having 20.000 rows with 4 conditions and 1 action in CSV format and set the following parameters for JVM -Xmx3072M -XX:MaxPermSize=256M. I haveOutOfMemoryException with the following stack trace java.lang.OutOfMemoryError: Java heap space at java.lang.String.format(String.java:2558) at org.drools.lang.DroolsParserExceptionFactory.formatParserLocation(DroolsParserExceptionFactory.java:203) at org.drools.lang.DroolsParserExceptionFactory.createErrorMessage(DroolsParserExceptionFactory.java:104) at org.drools.lang.DroolsParserExceptionFactory.createDroolsException(DroolsParserExceptionFactory.java:89) at org.drools.lang.DRLParser.reportError(DRLParser.java:350) at org.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken(BaseRecognizer.java:624) at org.antlr.runtime.BaseRecognizer.match(BaseRecognizer.java:115) at org.drools.lang.DRLParser.fact(DRLParser.java:9841) at org.drools.lang.DRLParser.lhs_pattern(DRLParser.java:9388) at org.drools.lang.DRLParser.pattern_source(DRLParser.java:7432) at org.drools.lang.DRLParser.lhs_unary(DRLParser.java:6582) at org.drools.lang.DRLParser.lhs_and(DRLParser.java:6229) at org.drools.lang.DRLParser.lhs_or(DRLParser.java:5877) at org.drools.lang.DRLParser.lhs(DRLParser.java:5673) at org.drools.lang.DRLParser.normal_lhs_block(DRLParser.java:5580) at org.drools.lang.DRLParser.when_part(DRLParser.java:3975) at org.drools.lang.DRLParser.rule(DRLParser.java:3769) at org.drools.lang.DRLParser.statement(DRLParser.java:993) at org.drools.lang.DRLParser.compilation_unit(DRLParser.java:484) at org.drools.compiler.DrlParser.compile(DrlParser.java:238) at org.drools.compiler.DrlParser.parse(DrlParser.java:78) at org.drools.compiler.DrlParser.parse(DrlParser.java:83) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:275) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:510) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:31) .... Is 3Gb not enough for such a problem?! How may memory requirements be estimated?