Hi Bharati, Your mapper class implementation methods have access to a MapContext:
http://hadoop.apache.org/docs/current/api/org/apache/hadoop/mapreduce/MapContext.html This is a subclass of TaskAttemptContext: http://hadoop.apache.org/docs/current/api/org/apache/hadoop/mapreduce/TaskAttemptContext.html You can use the TaskAttemptContext to call getTaskAttemptId and retrieve a TaskAttemptID object: http://hadoop.apache.org/docs/current/api/org/apache/hadoop/mapreduce/TaskAttemptID.html A task attempt ID consists of the task ID + an attempt number. Note that task ID alone is not guaranteed to be unique across execution of the whole job. Due to speculative execution or transient task failures, multiple attempts of the same task can run, and they'll all have the same task ID. The task ID + attempt number is guaranteed to be unique within the job. BTW, it's pretty much the same process for a reducer too, except you're working with a ReduceContext instead of a MapContext. Hope this helps, --Chris On Thu, Apr 25, 2013 at 8:45 AM, Bharati <bharati.ad...@mparallelo.com>wrote: > Hi Folks, > > I need to find the task ID of the map task. > Please send me any ideas or suggestions. > > Thanks, > Bharati > > Sent from my iPad > > Fortigate Filtered > >
