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https://issues.apache.org/jira/browse/MAPREDUCE-7468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17805195#comment-17805195
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ASF GitHub Bot commented on MAPREDUCE-7468:
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brumi1024 opened a new pull request, #6436:
URL: https://github.com/apache/hadoop/pull/6436
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### Description of PR
### How was this patch tested?
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> Change add-opens flag's default value from true to false
> --------------------------------------------------------
>
> Key: MAPREDUCE-7468
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7468
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 3.4.0, 3.3.7
> Reporter: Benjamin Teke
> Assignee: Benjamin Teke
> Priority: Major
>
> To support avoid issues when a newer JobClient is used with Hadoop versions
> without MAPREDUCE-7449 the default value of
> mapreduce.jvm.add-opens-as-default should be false. Currently it's true, this
> can cause if a newer JobClient is used to submit apps, as the placeholder
> replacement won't happen during a container launch, resulting in a failed
> submission.
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