<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:10pt">Hi,<br><br>I will.<br>Should I file it again under <a rel="nofollow" class="yiv1608119382moz-txt-link-freetext" target="_blank" href="https://issues.jboss.org/browse/JBRULES">https://issues.jboss.org/browse/JBRULES</a>
in component drools-planner ?<br><br>Regards,<br><br>Michiel<br><div><span><br></span></div><div> </div><div>-----------------<br>http://www.codessentials.com - Your essential software, for free!<br>Follow us at http://twitter.com/#!/Codessentials<br></div> <div style="font-family: tahoma, new york, times, serif; font-size: 10pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Geoffrey De Smet <ge0ffrey.spam@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> Rules Users List <rules-users@lists.jboss.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, January 16, 2013 10:51 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [rules-users] NullPointerException at org.mvel2.ast.IntSub.getReducedValueAccelerated<br> </font>
</div> <br>
<div id="yiv1262365888">
<div>
The DRL uses mvel under the covers.<br>
<br>
Looks like a bug in mvel, possibly in the JIT compilation (which
could explain the 1 out of 5 runs behaviour).<br>
File an issue in our jira: include the stacktrace, versions of
drools-core and the mvel jar<br>
and - if possible - the rule to which it applies.<br>
<br>
<div class="yiv1262365888moz-cite-prefix">Op 16-01-13 09:59, Michiel Vermandel
schreef:<br>
</div>
<blockquote type="cite">
<div style="color:#000;background-color:#fff;font-family:tahoma, new york, times, serif;font-size:10pt;">
<div>Hi,</div>
<div><br>
</div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;">When starting the planning
solver I sometimes get the error as listed beneath.</div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;">I think it happens about 1
out of 5 runs.</div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;">It doesn't seem to have much
influence on the solving process as everything continues
normally (I think).</div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;">I do not use any mvel
expressions to my knowledge.</div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;"><br>
</div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;">Anyway, it would be nice to
understand why this happens and how to get this resolved.<br>
<span></span></div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;"><br>
<span></span></div>
<div style="color:rgb(0, 0, 0);font-size:13.3333px;font-family:tahoma, new york, times, serif;
background-color:transparent;font-style:normal;"><span>Exception in thread
"Thread-1" java.lang.NullPointerException<br>
at
org.mvel2.ast.IntSub.getReducedValueAccelerated(IntSub.java:17)<br>
at
org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:38)<br>
at
org.mvel2.ast.Substatement.getReducedValueAccelerated(Substatement.java:44)<br>
at
org.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:108)<br>
at
org.mvel2.ast.And.getReducedValueAccelerated(And.java:34)<br>
at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)<br>
at
org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)<br>
at
org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)<br>
at
org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:113)<br>
at org.mvel2.MVEL.executeExpression(MVEL.java:930)<br>
at
org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:70)<br>
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureBranchEvaluation(MvelConditionEvaluator.java:117)<br>
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:102)<br>
at
org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:90)<br>
at
org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:82)<br>
at
org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:270)<br>
at
org.drools.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:51)<br>
at
org.drools.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:250)<br>
at
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown
Source)<br>
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown
Source)<br>
at java.lang.Thread.run(Unknown Source)</span></div>
<div> <br>
Thanks,<br>
<br>
Michiel<br>
</div>
<div>-----------------<br>
http://www.codessentials.com - Your essential software, for
free!<br>
Follow us at http://twitter.com/#!/Codessentials</div>
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