[rules-users] memory leak in Guvnor 5.3 when rules have incorrect regular expressions ?

[vadlam]

we have hundreds of rules created  in Guvnor 5.3..Final.

 some of them use regular expressions when using the matches operator.

when business users enter an incorrect regular expression and rules are
built in guvnor subsequently, we have noticed heap  consumption grow quite a
bit and not released subsequenlty. 
currently, on a windows server that has approximately 1.3 GB heap available,
running 1 or builds consumes the whole memory and eventually crashes the
server.

The following is from one such log trace

[Near : {... **HST ....}]
               ^
[Line: 1, Column: 3]
[Error: Missing left node]
[Near : {... **HST ....}]
               ^
[Line: 1, Column: 3]
	at
org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:293)
	at
org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)
	at
org.drools.rule.builder.PatternBuilder.setInputs(PatternBuilder.java:903)
	at
org.drools.rule.builder.PatternBuilder.buildRelationalExpression(PatternBuilder.java:599)
	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:540)
	at
org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternBuilder.java:398)
	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:314)
	at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:131)
	at
org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65)
	at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2289)
	at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:807)
	at
org.drools.guvnor.server.contenthandler.GuidedDTContentHandler.compile(GuidedDTContentHandler.java:63)
	at
org.drools.guvnor.server.builder.PackageAssembler.loadAllButDRLAssets(PackageAssembler.java:83)
	at
org.drools.guvnor.server.builder.PackageAssembler.loadAssets(PackageAssembler.java:73)
	at
org.drools.guvnor.server.builder.PackageAssembler.buildPackage(PackageAssembler.java:65)
	at
org.drools.guvnor.server.builder.PackageAssembler.compile(PackageAssembler.java:55)
	at
org.drools.guvnor.server.RepositoryPackageOperations.buildPackage(RepositoryPackageOperations.java:506)
	at
org.drools.guvnor.server.RepositoryPackageOperations.buildPackage(RepositoryPackageOperations.java:475)
	at
org.drools.guvnor.server.RepositoryPackageService.buildPackage(RepositoryPackageService.java:314)

Any thoughts or suggestions around these memory leak issues? 

--
View this message in context: http://drools.46999.n3.nabble.com/memory-leak-in-Guvnor-5-3-when-rules-have-incorrect-regular-expressions-tp3711977p3711977.html
Sent from the Drools: User forum mailing list archive at Nabble.com.