Issue

• After some times successfully calling fireAllRules the code starts throwing NoSuchMethodError as shown below in BRMS 6.0.x . How to fix this issue?

java.lang.NoSuchMethodError: java.lang.StringBuilder.append(Ljava/lang/Integer;)Ljava/lang/StringBuilder;
        at ConditionEvaluator03bc5c0523904001b3bec49b1ed5c257.evaluate(Unknown Source)
        at org.drools.core.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:217)
        at org.drools.core.rule.constraint.MvelConstraint.isAllowedCachedLeft(MvelConstraint.java:186)
        at org.drools.core.common.TripleBetaConstraints.isAllowedCachedLeft(TripleBetaConstraints.java:112)
        at org.drools.core.phreak.PhreakJoinNode.doLeftInserts(PhreakJoinNode.java:98)
        at org.drools.core.phreak.PhreakJoinNode.doNode(PhreakJoinNode.java:60)
        at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:547)
        at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:533)
        at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:334)
        at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
        at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
        at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:193)
        at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:68)
        at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:936)
        at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1201)
        at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:952)
        at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:931)
        at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:260)

• Similar issues seems to be reported in the Drools community https://issues.jboss.org/browse/DROOLS-469 . Could that be related?