决策集循环规则遍历报java.util.ConcurrentModificationException错误

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• 当前使用的URule的具体版本号：

URule Pro试用版 : urule-pro-3.0.0-RC4

• 遇到的问题详细描述：

无法删除满足条件的集合元素

• 涉及到的异常信息（完整异常信息）：

错误发生位置：执行规则[医嘱排班集合判空(jcr:/schedule/testRemove.rs.xml)]动作错误发生位置：执行规则[筛选被限制的排班(jcr:/schedule/testRemove.rs.xml)]动作错误发生位置：执行规则[筛选被限制的排班(jcr:/schedule/testRemove.rs.xml)]动作
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
at java.util.ArrayList$Itr.next(ArrayList.java:859)
at com.bstek.urule.model.rule.loop.LoopRule.execute(LoopRule.java:57)
at com.bstek.urule.runtime.agenda.ActivationImpl.execute(ActivationImpl.java:58)
at com.bstek.urule.runtime.agenda.ActivationRuleBox.execute(ActivationRuleBox.java:41)
at com.bstek.urule.runtime.agenda.Agenda.a(Agenda.java:98)
at com.bstek.urule.runtime.agenda.Agenda.activePendedGroupAndExecute(Agenda.java:66)
at com.bstek.urule.runtime.AbstractWorkingMemory.activePendedGroupAndExecute(AbstractWorkingMemory.java:97)
at com.bstek.urule.model.function.ActiveAndExecutePendedFunctionDescriptor.doFunction(ActiveAndExecutePendedFunctionDescriptor.java:29)
at com.bstek.urule.action.ExecuteCommonFunctionAction.execute(ExecuteCommonFunctionAction.java:50)
at com.bstek.urule.runtime.agenda.ActivationImpl.a(ActivationImpl.java:87)
at com.bstek.urule.runtime.agenda.ActivationImpl.execute(ActivationImpl.java:63)
at com.bstek.urule.runtime.agenda.ActivationRuleBox.execute(ActivationRuleBox.java:41)
at com.bstek.urule.runtime.agenda.Agenda.execute(Agenda.java:56)
at com.bstek.urule.runtime.execution.RuleExecution.a(RuleExecution.java:68)
at com.bstek.urule.runtime.execution.RuleExecution.fireRules(RuleExecution.java:41)
at com.bstek.urule.runtime.KnowledgeSessionImpl.a(KnowledgeSessionImpl.java:98)
at com.bstek.urule.runtime.KnowledgeSessionImpl.fireRules(KnowledgeSessionImpl.java:77)
at com.bstek.urule.model.rule.loop.LoopRule.doLoop(LoopRule.java:95)
at com.bstek.urule.model.rule.loop.LoopRule.execute(LoopRule.java:58)
at com.bstek.urule.runtime.agenda.ActivationImpl.execute(ActivationImpl.java:58)
at com.bstek.urule.runtime.agenda.ActivationRuleBox.execute(ActivationRuleBox.java:41)
at com.bstek.urule.runtime.agenda.Agenda.execute(Agenda.java:56)
at com.bstek.urule.runtime.execution.RuleExecution.a(RuleExecution.java:68)
at com.bstek.urule.runtime.execution.RuleExecution.fireRules(RuleExecution.java:41)
at com.bstek.urule.runtime.KnowledgeSessionImpl.a(KnowledgeSessionImpl.java:98)
at com.bstek.urule.runtime.KnowledgeSessionImpl.fireRules(KnowledgeSessionImpl.java:65)
at com.bstek.urule.console.servlet.respackage.PackageServletHandler.doQuickTest(PackageServletHandler.java:638)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.bstek.urule.console.servlet.BaseServletHandler.invokeMethod(BaseServletHandler.java:29)
at com.bstek.urule.console.servlet.respackage.PackageServletHandler.execute(PackageServletHandler.java:106)
at com.bstek.urule.console.servlet.URuleServlet.service(URuleServlet.java:106)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:660)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:808)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

• 相关截图：

情景1：传入为“医嘱集合“的医嘱，””“医嘱集合”的字段“医嘱”size为1，医嘱的字段“空腹”为true，医嘱的字段“排班集合”size为1，预期：排班集合为空，实际：报错
情景2：传入为“医嘱集合“的医嘱，“医嘱集合”的字段“医嘱”size为1，医嘱的字段“空腹”为true，医嘱的字段“排班集合”size为2，预期：排班集合为空，实际：只删除了第一个元素且没遍历第二个元素
情景3：传入为“医嘱集合“的医嘱，“医嘱集合”的字段“医嘱”size为1，医嘱的字段“空腹”为true，医嘱的字段“排班集合”size为3，预期：排班集合为空，实际：报错
情景4：传入为医嘱的排班集合，删除某个位置的元素，预期：准确删除特定位置的元素，实际：除了元素在最后一个位置的情况下报错，其他位置可删除成功

[Askerlve]

在知识包执行之前会对参数进行初始化赋默认值，集合类的对象都不是线程安全的对象，要不只迭代，要么将集合类的初始化为线程安全的对象。具体代码就在KnowledgeSessionImpl的构造器，相对还是比较好找。