{"issue":{"created_at":"2011-12-09T21:54:20Z","state":"open","updated_at":"2011-12-09T21:54:20Z","comments":0,"user":{"gravatar_id":"d62b61123385a1b87d77f77c92d1ef96","id":905563,"url":"https://api.github.com/users/piccolbo","avatar_url":"https://secure.gravatar.com/avatar/d62b61123385a1b87d77f77c92d1ef96?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","login":"piccolbo"},"body":"I thought omitting the reducer was enough. Not so. One has to specify  -D mapred.reduce.tasks=0, which is possible in dev through the tuning parameters options but not recommended so we should probably provide a different mechanism. But it is not totally clear to me what happens when the reducer is not specified and the above option not set.","assignee":null,"id":2507475,"pull_request":{"patch_url":null,"html_url":null,"diff_url":null},"labels":[{"name":"complexity-medium","color":"e102d8","url":"https://api.github.com/repos/RevolutionAnalytics/RHadoop/labels/complexity-medium"},{"name":"importance-medium","color":"0b02e1","url":"https://api.github.com/repos/RevolutionAnalytics/RHadoop/labels/importance-medium"},{"name":"pkg-rmr","color":"02d7e1","url":"https://api.github.com/repos/RevolutionAnalytics/RHadoop/labels/pkg-rmr"},{"name":"type-improvement","color":"02e10c","url":"https://api.github.com/repos/RevolutionAnalytics/RHadoop/labels/type-improvement"}],"number":32,"title":"map only jobs","html_url":"https://github.com/RevolutionAnalytics/RHadoop/issues/32","closed_at":null,"url":"https://api.github.com/repos/RevolutionAnalytics/RHadoop/issues/32","milestone":null},"action":"opened"}