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https://issues.apache.org/jira/browse/MAPREDUCE-815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790835#action_12790835
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Doug Cutting commented on MAPREDUCE-815:
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> What is the current line of thought on how keys and values will interact with
> the schema for an avro file?
I think, similar toTextInputFormat and TextOutputFormat, only one of key and
value will be useful and the other will be null. It doesn't matter much which.
If input keys have the Avro datum and values are null then the default
identity mapper can be used to sort data, while if input values contain the
Avro datum and keys are null then InverseMapper must be specified.
> Add AvroInputFormat and AvroOutputFormat so that hadoop can use Avro
> Serialization
> ----------------------------------------------------------------------------------
>
> Key: MAPREDUCE-815
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-815
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Reporter: Ravi Gummadi
> Assignee: Ravi Gummadi
>
> MapReduce needs AvroInputFormat similar to other InputFormats like
> TextInputFormat to be able to use avro serialization in hadoop. Similarly
> AvroOutputFormat is needed.
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