java.util.ConcurrentModificationException 异常

public static LinkedList<Member> pollMemberList = new LinkedList<>();

当我们移除pollMemberList里面元素Member的时候，不要使用for循环

if (pollMemberList.size()>0){
    //清空全局轮询的list
    Iterator<Member> iteratorlist = pollMemberList.iterator();
    while(iteratorlist.hasNext()){
         Member integer = iteratorlist.next();
         iteratorlist.remove();   //注意这个地方
    }
}