I want to get the id of each mapper and reducer task because I want to tag the output of these mappers and reducers according to the mapper and reducer id. How can I retrieve the ids of each?
Than开发者_StackOverflow中文版ks
You can print taskId in map, setup etc. functions by utilizing following code.
context.getTaskAttemptID().getTaskID();
you can do it using: org.apache.hadoop.mapreduce.MapContext::getTaskAttemptID().
u盘插电视上播放显示打开文件失败咋回事，类型都是mp4的...u盘插电视上播放显示打开文件失败咋回事，类型都是mp4的展开世纪勇士
海信电视黑屏但有声音如何办...海信电视黑屏但有声音如何办展开克雷西亚 11小时前
电视怎么连接wifi陌上柳絮飞横行九州sadwqr 7小时前 操作方法如下：设备：海信电视1、以海信电视为例，首先确定电视有WIFI功能，可以连接的WiFi。2、打开电视进入系统设置界面，并点击无线网络。3、进入无线网络
z1.jpg (133.23 KB, 下载次数: 0) 下载附件 2022-7-30 19:26 上传z2.jpg (111.41 KB, 下载次数: 0)
治不孕去那好 补充说明：治不孕去那好志木市乾隆 2小时前 不孕不育症的原因有输卵管因素不孕,卵巢因素不孕,子宫因素不孕,内排泄因素不孕等许多原因,不过假如你须要医治,提议你正规的医院门诊医治。
I need to generate an XML output using Perl code.I\'m trying not to use any libraries,as it\'s very simple, temporary XML that gets used by another step in the process.
It seems to me Apple won\'t allow this, but I need to make sure. For an app we\'re building, we want to ask the user to enter payment information (including credit card details) to pay for tickets. T
是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
Is there anyway to use a PostgreSQL GUI to modify the database contents without doing a db:pul开发者_开发技巧l?
加载中,请稍侯......
精彩评论