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https://issues.apache.org/jira/browse/AVRO-1306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13638360#comment-13638360
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Mina Naguib commented on AVRO-1306:
-----------------------------------
Hi Doug
I don't think AvroReducer is involved here. The patch is for the section of
the doc titled:
{code}
For jobs whose input is an Avro data file and which use an AvroMapper, but
whose reducer is a non-Avro Reducer and whose output is a non-Avro format
{code}
In this case, I had an AvroMapper, and a vanilla hadoop reducer (input
AvroKey/AvroValue, output Text/IntWritable). Since the output is not
AvroKey/AvroValue, it's not suitable for being used as a combiner, as it's
output can't be re-fed into its input.
> Clarify documentation for hadoop input-avro output-non-avro instructions
> ------------------------------------------------------------------------
>
> Key: AVRO-1306
> URL: https://issues.apache.org/jira/browse/AVRO-1306
> Project: Avro
> Issue Type: Improvement
> Components: java
> Affects Versions: 1.7.5
> Reporter: Mina Naguib
> Priority: Minor
> Labels: documentation, patch
> Attachments: input_avro_output_nonavro_doc_update.diff
>
>
> The documentation for hadoop usage (input avro, output non-avro) is
> misleading, as the Reducer is likely not usable as a combiner. Attached
> patch clarifies documentation.
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