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https://issues.apache.org/jira/browse/HADOOP-4065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12631544#action_12631544
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Doug Cutting commented on HADOOP-4065:
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Please don't edit descriptions. It's very difficult to tell what's changed.
The description should describe the problem. The discussion below should
present solutions. Editing descriptions and comments makes it very hard to
follow an issue. This is discussed in the "Jira Guidlines" section of
http://wiki.apache.org/hadoop/HowToContribute.
> support for reading binary data from flat files
> -----------------------------------------------
>
> Key: HADOOP-4065
> URL: https://issues.apache.org/jira/browse/HADOOP-4065
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Joydeep Sen Sarma
> Attachments: HADOOP-4065.0.txt, HADOOP-4065.1.txt, ThriftFlatFile.java
>
>
> Implement generic FlatFileDeserializationRecordReader which assumes a
> Serialization Implementation is specific in the JobConf and that once
> instantiated, that Serialization Implementation can figure out the actual
> class being Deserialized from the JobConf. e.g., the JobConf specifies
> RecordIOSerialization and then the specific class is LogRecordObject.
> Another way one might to do this is to use the SerializationFactory to do the
> lookup of the Serialization Implementation; however, this requires all
> Serialization Implementations to be known apriori and registered and goes
> against the spirit of a very generic FlatFileDeserializeRecordReader. (see
> below re: adding Serialization implementations to contrib).
> To ensure it is generic, I propose implementing the following Serialization
> implementations:
> 1. RecordIOSerialization
> 2. LineReaderSerialization
> 3. ThriftSerialization
> The first 2 should go in io/serialization and the Thrift one in contrib
> somewhere.
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