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