The map and reduce functions are running a different JVM, so they
never ran the main() method. You can implement a configure(JobConf
job) method in your map and reduce classes which will be passed the
JobConf you used to launch the job.
-Joey
On Wed, Sep 21, 2011 at 9:36 AM, pranjal shrivastava
<brillian...@gmail.com> wrote:
>
> pranjal shrivastava to mapreduce-user.
> show details 9:12 AM (22 minutes ago)
> Hi
> I declared JobConf object static and globally in the main class and
> initialized it in the main function.Since it is global and static to inner
> mapper and reducer classes ,I tried to JobConf object in the mapper and
> reducer function.But on doing this I find JobConf object to be null.Why is
> this happening .
>
> Code is like
> class wordcount{
> private static JobConf conf;
>
> //public static mapperclass{
> //I try to access conf object here which comes to be null
>
> }
> //public static reducerclass{
> }
> public static void main(String args[]){
> conf=new JobConf(wordcount.class)
> //set mapper class
> //setreducer class
> //set job client
> //launch the mappers,reducers
> }
> }
>
> Whats going wrong?Why I am not able to access conf object in mapper.I need
> this for using distributed cache files.
>
> Thank you
> Pranjal
--
Joseph Echeverria
Cloudera, Inc.
443.305.9434
