context.getTaskAttemptID() gives the task attempt id and context,getTaskAttemptID().getTaskID() gives the task id of the reducer. Context.getTaskAttemptID().getTaskID().getId() gives the reducer number.
Thanks Amareshwari On 4/27/10 5:34 AM, "Gang Luo" <[email protected]> wrote: JobConf.get("mapred.task.id") gives you everything (including attempt id). -Gang ----- 原始邮件 ---- 发件人： Farhan Husain <[email protected]> 收件人： [email protected] 发送日期： 2010/4/26 (周一) 7:13:03 下午 主 题： Reducer ID Hello, Is it possible to know the unique id of a reducer inside the reduce or setup method of a reducer class? I tried to find any method of the context class which might help in this regard but could not get any. Thanks, Farhan
