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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3413) SequenceFile.Reader doesn't use the Serialization framework
Date Mon, 19 May 2008 19:11:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12598049#action_12598049
] 

Tom White commented on HADOOP-3413:
-----------------------------------

bq. a simple app which writes a SequenceFile with Java Serialization won't be able to read
it back... 

But it would have to write its own SequenceFileOutputFormat as things stand, so while possible,
it's not likely to be a common occurrence.

Thanks for picking this up Arun - I hope we can get this fixed in 0.18. There are also few
other places that can remove their dependency on Writables without much effort - e.g. SequenceFileInputFilter,
and MultipleOutputFormat (and subclasses).

> 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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