蜂巢总是减少到 0%答案

【问题标题】：hive always reduce on 0%蜂巢总是减少到 0%
【发布时间】：2012-12-08 13:59:41
【问题描述】：

我使用 hive 来分析数据我创建表并将本地文件加载到配置单元当我在 hive 上运行 hiveql 时

select sum(qlog_test.contlength) from qlog_test where qlog_test.area='HK' limit 10; 它卡在地图上 100% 减少 0%

2012-12-08 21:39:28,349 Stage-1 map = 80%, reduce = 0%, Cumulative CPU 29.72 sec 2012-12-08 21:39:29,370 Stage-1 map = 80%, reduce = 0%, Cumulative CPU 29.72 sec 2012-12-08 21:39:30,385 Stage-1 map = 80%, reduce = 0%, Cumulative CPU 29.72 sec 2012-12-08 21:39:31,401 Stage-1 map = 80%, reduce = 0%, Cumulative CPU 29.72 sec 2012-12-08 21:39:32,413 Stage-1 map = 80%, reduce = 0%, Cumulative CPU 29.72 sec 2012-12-08 21:39:33,423 Stage-1 map = 80%, reduce = 0%, Cumulative CPU 29.72 sec 2012-12-08 21:39:34,434 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:35,445 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:36,455 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:37,466 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:38,485 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:39,503 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:40,515 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:41,526 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:42,536 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:43,551 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:44,561 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:45,570 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:46,580 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:47,589 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:48,603 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:49,619 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:50,632 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:51,647 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:52,661 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:53,675 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:54,686 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:55,698 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:56,710 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:57,720 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:58,732 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:39:59,747 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:00,758 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:01,768 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:02,777 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:03,786 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:04,795 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:05,804 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:06,815 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:07,828 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:08,840 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:09,854 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 2012-12-08 21:40:10,867 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 35.89 sec 这是我的 hadoop 节点详细信息

这是 map/reduce 作业的详细信息

【问题讨论】：

是否有可用的插槽供减速器运行？
如何查看reducer slot是否可用？
它显示在工作跟踪器 web ui 的顶层

标签： hadoop mapreduce hive bigdata

【解决方案1】：

我遇到了这个问题。确保查看减速器日志。参考您的屏幕截图，单击减少行中的 1 并跟踪记录所有数据的文件。然后，单击全部，然后查看导致问题的原因。我遇到的问题是 IP 配置错误，因此 mapper 和 reducer 无法通信。重新启动我的系统有帮助。编辑您的问题以包括减少日志所说的内容，也许我们可以进一步帮助您。

【讨论】：