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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3413) SequenceFile.Reader doesn't use the Serialization framework
Date Mon, 19 May 2008 17:27:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598008#action_12598008
] 

Arun C Murthy commented on HADOOP-3413:
---------------------------------------

Tom, makes sense - thanks for weighing in!

The minor jarring note is that a simple app which writes a SequenceFile with Java Serialization,
they won't be able to read it back... on the bright side most Map-Reduce applications are
*ok* since SequenceFile{Input|Output}Format doesn't support non-Writables yet.


> SequenceFile.Reader doesn't use the Serialization framework
> -----------------------------------------------------------
>
>                 Key: HADOOP-3413
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3413
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.17.0
>            Reporter: Arun C Murthy
>            Assignee: Arun C Murthy
>            Priority: Critical
>             Fix For: 0.18.0
>
>         Attachments: hadoop-3413.patch
>
>
> Currently SequenceFile.Reader only works with Writables, since it doesn't use the new
Serialization framework. This is a glaring considering that SequenceFile.Writer uses the Serializer
and handles arbitrary types via the SerializationFactory.

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