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https://issues.apache.org/jira/browse/HADOOP-12994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15223453#comment-15223453
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Steve Loughran commented on HADOOP-12994:
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new tests show that HDFS client doesn't validate is arguments completely; while
still failing, it fails in "odd" ways
> Specify PositionedReadable, add contract tests, fix problems
> ------------------------------------------------------------
>
> Key: HADOOP-12994
> URL: https://issues.apache.org/jira/browse/HADOOP-12994
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.8.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
>
> Some work on S3a has shown up that there aren't tests catching regressions in
> readFully, reviewing the documentation shows that its specification could be
> improved.
> # review the spec
> # review the implementations
> # add tests (proposed: to the seek contract; streams which support seek
> should support positioned readable)
> # fix code, where it differs significantly from HDFS or LocalFS
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