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https://issues.apache.org/jira/browse/HADOOP-17631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-17631.
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Fix Version/s: 3.3.2
Resolution: Fixed
> Configuration ${env.VAR:-FALLBACK} should eval FALLBACK when
> restrictSystemProps=true
> --------------------------------------------------------------------------------------
>
> Key: HADOOP-17631
> URL: https://issues.apache.org/jira/browse/HADOOP-17631
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.3.2
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> When configuration reads in resources with a restricted parser, it skips
> evaluaging system ${env. } vars. But it also skips evaluating fallbacks
> As a result, a property like
> ${env.LOCAL_DIRS:-${hadoop.tmp.dir}} ends up evaluating as
> ${env.LOCAL_DIRS:-${hadoop.tmp.dir}}
> It should instead fall back to the "env var unset" option of
> ${hadoop.tmp.dir}. This allows for configs (like for s3a buffer dirs) which
> are usable in restricted mode as well as unrestricted deployments.
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