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https://issues.apache.org/jira/browse/HADOOP-8395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273859#comment-13273859
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Harsh J commented on HADOOP-8395:
---------------------------------
Committed to trunk.
> Text shell command unnecessarily demands that a SequenceFile's key class be
> WritableComparable
> ----------------------------------------------------------------------------------------------
>
> Key: HADOOP-8395
> URL: https://issues.apache.org/jira/browse/HADOOP-8395
> Project: Hadoop Common
> Issue Type: Bug
> Components: util
> Affects Versions: 2.0.0
> Reporter: Harsh J
> Assignee: Harsh J
> Priority: Trivial
> Labels: shell
> Fix For: 3.0.0
>
> Attachments: HADOOP-8395.patch
>
>
> Text from Display set of Shell commands (hadoop fs -text), has a strict
> subclass check for a sequence-file-header loaded key class to be a subclass
> of WritableComparable.
> The sequence file writer itself has no such checks (one can create sequence
> files with just plain writable keys, comparable is needed for sequence file's
> sorter alone, which not all of them use always), and hence its not reasonable
> for Text command to carry it either.
> We should relax the check and simply just check for "Writable", not
> "WritableComparable".
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