Are you inserting facts from different threads in a statefull session?<br><br><div class="gmail_quote">On Tue, Jun 22, 2010 at 10:21 AM, <span dir="ltr"><<a href="mailto:Tom.E.Murphy@wellsfargo.com">Tom.E.Murphy@wellsfargo.com</a>></span> wrote:<br>
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<div>Anybody have any ideas on this?</div>
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<div>We are seeing <font face="Times New Roman, serif" size="3">ConcurrentModificationException</font> while inserting objects into working memory. This happens occasionally, either at service start-up, where the first transaction is being submitted and the
rules are loading for the first time, or sometimes under heavy loads with lots of transactions being processed by the service:</div>
<div>Drools 5.0.1-GA</div>
<div>AS: Web Logic</div>
<div>JVM: 1.5</div>
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<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">Fragment of stack trace:</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">Caused by: java.util.ConcurrentModificationException</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">java.util.HashMap$HashIterator.nextEntry(HashMap.java:2117)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">java.util.HashMap$ValueIterator.next(HashMap.java:2147)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.reteoo.EntryPointNode.updateSink(EntryPointNode.java:285)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.reteoo.ObjectTypeNode.attach(ObjectTypeNode.java:279)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.reteoo.builder.PatternBuilder.attachObjectTypeNode(PatternBuilder.java:234)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.reteoo.ClassObjectTypeConf.<init>(ClassObjectTypeConf.java:93)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.common.ObjectTypeConfigurationRegistry.getObjectTypeConf(ObjectTypeConfigurationRegistry.java:58)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:849)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:788)</font></div>
<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Times New Roman, serif" size="3">org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:216)</font></div>
<div><font face="Times New Roman, serif" size="3">com.wellsfargo.ARGenT.Execution.DefaultLoader.Load(DefaultLoader.java:16)</font></div>
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<div style="margin-top: 5pt; margin-bottom: 5pt;"><font face="Georgia, serif" size="2"><b>Tom Murphy<br>
<br>
</b><font face="Verdana, sans-serif" size="1">Business Process Consultant<br>
Wells Fargo HCFG - CORE Deal Decisioning Platform<br>
<br>
</font><font color="#7f7f7f" face="Verdana, sans-serif" size="1">800 S. Jordan Creek Parkway | West Des Moines, IA 50266<br>
MAC: X2301-01B<br>
</font><font color="#7f7f7f" face="Verdana, sans-serif" size="1">Office: 515 324 4853 | Mobile: 515 423 4334<br>
<br>
</font><font face="Verdana, sans-serif" size="1"><a href="mailto:tom.e.murphy@wellsfargo.com" target="_blank">tom.e.murphy@wellsfargo.com</a><br>
<br>
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