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https://issues.apache.org/jira/browse/HADOOP-3413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598008#action_12598008
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Arun C Murthy commented on HADOOP-3413:
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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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