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https://issues.apache.org/jira/browse/HADOOP-3700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sharad Agarwal resolved HADOOP-3700.
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Resolution: Won't Fix
There exists a workaround for this. Applications can avoid calling
output.collect for getting the skip behavior.
Also, the mechanism of notifying the framework by throwing exception is not
ideal as it doesn't work for streaming/pipes.
> Define User exception which can be thrown by user code to skip records
> ----------------------------------------------------------------------
>
> Key: HADOOP-3700
> URL: https://issues.apache.org/jira/browse/HADOOP-3700
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Reporter: Sharad Agarwal
>
> Currently there is no way, where user code can throw a specific Exception to
> notify the framework about skipping that record and move forward.
> This can be implemented in map, reduce, combine, and output format (maybe) as
> well as input method.
> To get the skip behavior, the user needs to write code that throws these
> exceptions, so this would not change the systems default behavior.
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