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https://issues.apache.org/jira/browse/HADOOP-9310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13579191#comment-13579191
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Steve Loughran commented on HADOOP-9310:
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To fix this, I propose
# the javadocs for the out of range -> empty array policy is defined. The test
{{TestGetFileBlockLocations}} does implicitly test for this against the default
FS, but it isn't part of the contract test suite.
# The expected behaviour for a directory argument needs to be defined, an FS
Contract test written, and all filesystems for which there is built in support
must pass the test.
> {FileSystem,FileContext}.getFileBlockLocations() are incompletely and
> incorrectly specified
> -------------------------------------------------------------------------------------------
>
> Key: HADOOP-9310
> URL: https://issues.apache.org/jira/browse/HADOOP-9310
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Reporter: Steve Loughran
>
> The javadocs of the {{getFileBlockLocations()}} methods in {{FileSystem}} and
> {{FileContext}} incorrectly specify the result when a nonexistent region is
> passed in (it's an empty array, not null), and nowhere is the response to a
> call of the method against a directory defined.
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