<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin:0cm;
margin-bottom:.0001pt;
text-align:justify;
text-justify:inter-ideograph;
text-indent:21.0pt;
font-size:10.5pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
/* Page Definitions */
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1343895525;
mso-list-type:hybrid;
mso-list-template-ids:-1644248578 1500779726 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:18.0pt;
text-indent:-18.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'>
<div class=WordSection1>
<p class=MsoNormal><span lang=EN-US>Hi, folks,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I’m using Drools 5.1, JDK 1.6 on
tomcat 6.0.28 to build a OLTP application. System’s volume is about 1.5
million transactions a day. The pilot PROD release was done about 1 week ago
and we’ve noticed many NoClassDefFoundError exception run time. A sample
piece is pasted below. For information security concern, I masked class names
here. This happened much more frequent when system load pressure is big –
memory is between 80% to 100% and disk is between 80% - 100%. As we are running
on a cloud virtual instance environment, virtual node has relatively small
profile – 40GB disk, 4GB memory, 2 core Intel 3.0 GHz CPU. I’ve
searched through the web and found some reported bug - <a
href="https://issues.jboss.org/browse/JBRULES-2253?_sscc=t">https://issues.jboss.org/browse/JBRULES-2253?_sscc=t</a>.
here I got two questions:<o:p></o:p></span></p>
<p class=MsoListParagraph style='margin-left:18.0pt;text-indent:-18.0pt;
mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-US>If anybody in the community has
met similar issue before and how you fix it?<o:p></o:p></span></p>
<p class=MsoListParagraph style='margin-left:18.0pt;text-indent:-18.0pt;
mso-list:l0 level1 lfo1'><![if !supportLists]><span lang=EN-US><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span lang=EN-US>It seems I can either convert
my rule into Java Dialect or turn off MVEL2 JIT attribute: </span><span
lang=EN-US style='font-family:"Arial","sans-serif";color:black'>Dmvel2.disable.jit=true.
Does anybody have summary information about the good and bad between MVEL and
JAVA dialect?</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>ERROR>2012-03-09 10:00:22,432 com.xxx.xxx.xxx.drools.SessionManager[pool-5-thread-6]:
Unexpected error :<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>java.lang.NoClassDefFoundError: com/xxx/xxx/xxx/xxx/xxx/GetAmountTolerance<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
ASMAccessorImpl_20916505061331280591040.getValue(Unknown Source)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:73)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:110)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:124)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.mvel2.MVELRuntime.execute(MVELRuntime.java:89)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:125)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.mvel2.MVEL.executeExpression(MVEL.java:928)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.base.mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.java:101)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.rule.PredicateConstraint.isAllowedCachedLeft(PredicateConstraint.java:314)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.common.DefaultBetaConstraints.isAllowedCachedLeft(DefaultBetaConstraints.java:226)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.JoinNode.assertLeftTuple(JoinNode.java:98)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:197)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:146)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:154)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:450)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:368)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:193)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:191)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:332)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:293)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:905)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:864)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:255)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
com.ssc.gce.reconcile.drools.SessionManager.insert(SessionManager.java:116)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
com.ssc.gce.reconcile.drools.SessionManager.run(SessionManager.java:171)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
java.lang.Thread.run(Thread.java:662)<o:p></o:p></span></p>
</div>
</body>
</html>