Mark, thanks for responding. Do you have a recommendation as to how much I
should
increase the perm gen space?
Also, is there anything else I can do to run my decision tables more
efficiently?
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)
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