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HADOOP-12730. Hadoop streaming -mapper and -reducer options are wrongly documented as required. Contributed by Kengo Seki.

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This commit is contained in:
Akira Ajisaka 2016-01-22 21:08:31 +09:00
parent 6831634682
commit 0bae506c22
2 changed files with 5 additions and 2 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -1642,6 +1642,9 @@ Release 2.8.0 - UNRELEASED
HADOOP-12659. Incorrect usage of config parameters in token manager of
KMS. (Mingliang Liu via xyao)
HADOOP-12730. Hadoop streaming -mapper and -reducer options are wrongly
documented as required. (Kengo Seki via aajisaka)
Release 2.7.3 - UNRELEASED
INCOMPATIBLE CHANGES

4
hadoop-tools/hadoop-streaming/src/site/markdown/HadoopStreaming.md.vm
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@ -96,8 +96,8 @@ The Hadoop streaming command options are listed here:
|:---- |:---- |:---- |
| -input directoryname or filename | Required | Input location for mapper |
| -output directoryname | Required | Output location for reducer |
| -mapper executable or JavaClassName | Required | Mapper executable |
| -reducer executable or JavaClassName | Required | Reducer executable |
| -mapper executable or JavaClassName | Optional | Mapper executable. If not specified, IdentityMapper is used as the default |
| -reducer executable or JavaClassName | Optional | Reducer executable. If not specified, IdentityReducer is used as the default |
| -file filename | Optional | Make the mapper, reducer, or combiner executable available locally on the compute nodes |
| -inputformat JavaClassName | Optional | Class you supply should return key/value pairs of Text class. If not specified, TextInputFormat is used as the default |
| -outputformat JavaClassName | Optional | Class you supply should take key/value pairs of Text class. If not specified, TextOutputformat is used as the default |