Re: why to force a single reduce task for Local Runner?

[Owen O'Malley]

On Nov 7, 2006, at 5:48 AM, Feng Jiang wrote:
look at the code:

job.setNumReduceTasks(1);                 // force a single reduce  
task

why? Is there any difficulty there to allow multiple reduce tasks?

There is not a good reason and a long standing bug to fix it:

http://issues.apache.org/jira/browse/HADOOP-206

Fixing it would allow a lot more of the framework code to be  
exercised in local runner mode.

-- Owen