[jira] [Resolved] (HADOOP-13699) Configuration does not substitute multiple references to the same var

["Andrew Wang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-13699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Wang resolved HADOOP-13699.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 3.0.0-alpha2

Committed to trunk, thanks for reviewing Xiao!

> Configuration does not substitute multiple references to the same var
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-13699
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13699
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: conf
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>            Priority: Critical
>             Fix For: 3.0.0-alpha2
>
>         Attachments: HADOOP-13699.001.patch
>
>
> Config var loop detection was originally introduced by HADOOP-6871. Due to cycle detection changes in the trunk patch for HADOOP-11506, resolution for multiple references to the same variable no longer resolved, e.g.
> {noformat}
> somekey = "${otherkey} ${otherkey}"
> {noformat}
> This loop detection business is fragile, expensive, and not in branch-2, so let's reduce it.



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