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https://issues.apache.org/jira/browse/HADOOP-4466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12641731#action_12641731
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Chris K Wensel commented on HADOOP-4466:
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via ant test-patch
[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
> SequenceFileOutputFormat is coupled to WritableComparable and Writable
> ----------------------------------------------------------------------
>
> Key: HADOOP-4466
> URL: https://issues.apache.org/jira/browse/HADOOP-4466
> Project: Hadoop Core
> Issue Type: Bug
> Components: io
> Affects Versions: 0.19.0
> Reporter: Chris K Wensel
> Attachments: hadoop-4466.patch
>
>
> For some reason SequenceFileOutputFormat calls asSubclass() for
> OutputKeyClass and OutputValueClass. This throws a ClassCastException when
> using non-Writable types with the new Serialization framework.
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