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https://issues.apache.org/jira/browse/MAPREDUCE-4251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhijie Shen resolved MAPREDUCE-4251.
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Resolution: Duplicate
It duplicates MAPREDUCE-5157. Reopen it if it is needed for 22 also.
> API Incompatibility - Sampler
> -----------------------------
>
> Key: MAPREDUCE-4251
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4251
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mrv1
> Affects Versions: 0.22.0
> Reporter: Benoy Antony
> Assignee: Benoy Antony
> Priority: Minor
> Attachments: MAPREDUCE-4251.patch
>
>
> org.apache.hadoop.mapred.lib.InputSampler#Sampler in Hadoop 0.20 has been
> moved to org.apache.hadoop.mapreduce.lib.partition.InputSampler#Sampler in
> Hadoop 0.22
> The arguments of the getSample method in the Sampler class have also been
> changed, 0.22 use the new InputFormat, and 0.20 use the deprecated
> InputFormat, 0.22 use org.apache.hadoop.mapreduce.Job and 0.20use
> org.apache.hadoop.mapred.JobConf.
> So the programs compiled with old api has to be changed.
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