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https://issues.apache.org/jira/browse/HADOOP-4408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12639274#action_12639274
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Tsz Wo (Nicholas), SZE commented on HADOOP-4408:
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+1 patch looks good.
> FsAction operations shouldn't create new Objects
> ------------------------------------------------
>
> Key: HADOOP-4408
> URL: https://issues.apache.org/jira/browse/HADOOP-4408
> Project: Hadoop Core
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.16.0
> Reporter: Chris Douglas
> Priority: Minor
> Fix For: 0.20.0
>
> Attachments: 4408-0.patch
>
>
> FsAction::and and related operations use {{values()[<expr>]}}, referencing a
> member var {{INDEX}}. This creates a new array object and uses member indices
> identical to {{ordinal()}}. It should either keep a reference to {{values()}}
> and use {{ordinal()}} explicitly or observe semantics consistent with
> {{INDEX}}.
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