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From "Micah Whitacre (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CRUNCH-300) Support reflected Avro record writing from MemPipeline
Date Wed, 20 Nov 2013 18:34:36 GMT

    [ https://issues.apache.org/jira/browse/CRUNCH-300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13827944#comment-13827944
] 

Micah Whitacre commented on CRUNCH-300:
---------------------------------------

As an FYI, I think there is going to be a conflict between this patch and the proposed changes
for CRUNCH-293.

> Support reflected Avro record writing from MemPipeline
> ------------------------------------------------------
>
>                 Key: CRUNCH-300
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-300
>             Project: Crunch
>          Issue Type: Improvement
>          Components: Core
>            Reporter: David Whiting
>            Priority: Minor
>         Attachments: 0001-Allow-MemPipeline-to-write-Avro-files-by-reflection.patch
>
>
> MemPipeline doesn't support writing Avro records via reflection. It seems that this was
half implemented but never finished, but I needed it to create some test data to run through
a cluster MapReduce test. The current implementation correctly reflects the schema, but then
uses a GenericDatumWriter to try and write the record, causing a ClassCastException. The correct
way would be to get a ReflectDatumWriter from the ReflectDataFactory.



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