[rules-users] DROOLS 5.6.0 Final Decision Table PermGen space OutOfMemoryError

[Mark Proctor]

On 17 Aug 2014, at 01:42, Jan Rose <ufos at comcast.net> wrote:

> Mark, thanks for responding.   Do you have a recommendation as to how much I should 
> increase the perm gen space?  
The more rules, the more permgen space. So there is no recommendation, other than “enough”.
>  Also, is there anything else I can do to run my decision tables more efficiently?
You can try using the MVEL dialect for your decision table - this uses reflection based executions, instead of code and uses less perm gen, in return for using more heap.
http://lists.jboss.org/pipermail/rules-users/2011-November/022912.html

Mark
> 
> Jan
> 
> 
> try increasing your perm gen space.
>  Mark On 16 Aug 2014, at 04:11, Jan Rose <ufos at comcast.net> wrote: > 
> Would like some advice regarding using Decision Tables in DROOLS 5.6.0 Final. 
>  We have decision tables with over 12,000 rows. 
>  It is a basic ‘look-up’ table with 3 conditions and 2 actions. 
>  The conditions are, for example: Company = X Dept = X Class = X then value = X and log X.
>  When I reduced the number of rows to approx. 500 . .. it works. > I have set the max memory in the JVM to 2 gigs. 
>  We have tried compiling the decision tables using the spreadsheet compiler as well as the decision table compiler. > 
> Below is the error when using the decision table compiler. 
>  However, we get the same PermGen space error with the spreadsheet compiler. > > 
> Obviously, we need to be able to have more than 500 rows in our decision table(s). Any advice would be appreciated. > > 
> Aug 14, 2014 6:33:09 PM com.macys.test.rules.engine.AttribDecisionTbl main > INFO: found file:c:\attribute-data.xls > Aug 14, 2014 6:33:10 PM com.macys.test.test_drools.RuleRunner loadRules >INFO: Loading file: log-rules.drl > Aug 14, 2014 6:33:10 PM com.macys.test.test_drools.RuleRunner loadRuleFile > INFO: found rule file:log-rules.drl > Aug 14, 2014 6:33:11 PM com.macys.test.test_drools.RuleRunner loadRules > INFO: Loading file: AttributeRules-MDSLife-V1.xls >Aug 14, 2014 6:33:11 PM com.macys.test.test_drools.RuleRunner loadExcelRules > INFO: found file:AttributeRules-MDSLife-V1.xls > Exception in thread "main" java.lang.OutOfMemoryError: PermGen space > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClass(ClassLoader.java:800) > at org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:624) > at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254) >at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237) > at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88) > at java.lang.ClassLoader.loadClass(ClassLoader.java:358) > at org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:434) > at org.drools.rule.JavaDialectRuntimeData.wire(JavaDialectRuntimeData.java:429) > at org.drools.rule.JavaDialectRuntimeData.onBeforeExecute(JavaDialectRuntimeData.java:257) > at org.drools.rule.DialectRuntimeRegistry.onBeforeExecute(DialectRuntimeRegistry.java:139) > at org.drools.compiler.PackageBuilder.reloadAll(PackageBuilder.java:1202) > at org.drools.compiler.PackageBuilder.compileAllRules(PackageBuilder.java:951) > at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:938) > at org.drools.compiler.PackageBuilder.addPackageFromDecisionTable(PackageBuilder.java:451) > at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:715) > at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:51) > at com.macys.test.test_drools.RuleRunner.loadExcelRules(RuleRunner.java:161) > at com.macys.test.test_drools.RuleRunner.loadRules(RuleRunner.java:53) > at com.macys.test.test_drools.RuleRunner.runStatelessRules(RuleRunner.java:217) > at com.macys.test.rules.engine.AttribDecisionTbl.main(AttribDecisionTbl.java:99) > > >_______________________________________________ > rules-users mailing list > rules-users at lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.jboss.org/pipermail/rules-users/attachments/20140816/e86011b7/attachment-0001.html
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