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<p class=MsoNormal>Hello,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am getting the following intermittent error from drools
5.0.1 when removing a knowledge package from a knowledge base:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>org.drools.reteoo.BetaMemory cannot be cast to
org.drools.reteoo.RuleTerminalNode$TerminalNodeMemory<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I iterate over knowledgeBase.getKnowledgePackages() and the error
occurs, but only occasionally.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>The full trace is as follows:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>java.lang.ClassCastException:
org.drools.reteoo.BetaMemory cannot be cast to
org.drools.reteoo.RuleTerminalNode$TerminalNodeMemory</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>at
org.drools.reteoo.RuleTerminalNode.doRemove(RuleTerminalNode.java:357)</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>at
org.drools.common.BaseNode.remove(BaseNode.java:95)</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>at org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:237)</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>at
org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:366)</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>at
org.drools.common.AbstractRuleBase.removeRule(AbstractRuleBase.java:712)</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>at org.drools.common.AbstractRuleBase.removePackage(AbstractRuleBase.java:640)</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:#3F7F5F'>at
org.drools.impl.KnowledgeBaseImpl.removeKnowledgePackage(KnowledgeBaseImpl.java:166)</span><span
style='font-size:10.0pt;font-family:"Courier New"'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any ideas why this would potentially happen?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas'>Cheerio,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas'>Nic<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Nicholas Hemley<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Senior Developer<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Sidonis | Powering a New Generation of Service Assurance</span></b><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p></o:p></span></p>
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