High CPU in org.drools.reteoo.BetaNode.doRemove() loop

Issue

• We have following thread consuming more CPU cycle almost 50% CPU.

"Thread-551" daemon prio=5 RUNNABLE
org.drools.reteoo.BetaNode.doRemove(BetaNode.java:381)
org.drools.common.BaseNode.remove(BaseNode.java:105)
org.drools.reteoo.RuleTerminalNode.doRemove(RuleTerminalNode.java:367)
org.drools.common.BaseNode.remove(BaseNode.java:105)
org.drools.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:242)
org.drools.reteoo.ReteooRuleBase.removeRule(ReteooRuleBase.java:453)
org.drools.common.AbstractRuleBase.removeRule(AbstractRuleBase.java:971)
org.drools.common.AbstractRuleBase.mergePackage(AbstractRuleBase.java:739)
org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:557)
org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:466)
org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:150)
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1083)
org.drools.agent.impl.KnowledgeAgentImpl.(KnowledgeAgentImpl.java:969)
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:673)
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:201)
org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1268)
java.lang.Thread.run(Unknown Source)