问题描述 类型不匹配:不能从 Integer 转换为 int <% //隐式对象,系统对象 jsp简化程序员的工作,已经建好的对象 //servletContext对象 net application //当前在线人数 int num = (Integer)application.getAttribute("usernum"); num++; application.setAttribute("usernum",new Integer(num)); %>
问题描述 spark streaming运行一段时间报以下异常,怎么解决 Exception in thread "main" org.apache.spark.SparkException: Job aborted due to stage failure: Task 2 in stage 1568735.0 failed 4 times, most recent failure: Lost task 2.3 in stage 1568735.0 (TID 11808399, iZ9