[ https://issues.apache.org/jira/browse/MAPREDUCE-5457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sandy Ryza updated MAPREDUCE-5457: ---------------------------------- Attachment: MAPREDUCE-5457-branch-1-1.patch > Add a KeyOnlyTextOutputReader to enable streaming to write out text files > without separators > -------------------------------------------------------------------------------------------- > > Key: MAPREDUCE-5457 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5457 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Affects Versions: 2.1.0-beta > Reporter: Sandy Ryza > Assignee: Sandy Ryza > Attachments: MAPREDUCE-5457-1.patch, MAPREDUCE-5457-2.patch, > MAPREDUCE-5457-branch-1-1.patch, MAPREDUCE-5457-branch-1.patch, > MAPREDUCE-5457.patch > > > MR jobs sometimes want to just output lines of text, not key/value pairs. > TextOutputFormat handles this by, if a null value is given, outputting only > the key with no separator. Streaming jobs are unable to take advantage of > this, because they can't output null values. A text output format reader > takes each line as a key and outputs NullWritables for values would allow > streaming jobs to output lines of text. -- This message was sent by Atlassian JIRA (v6.1#6144)