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https://issues.apache.org/jira/browse/HADOOP-6234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12780673#action_12780673
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Suresh Srinivas commented on HADOOP-6234:
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For 0.20 patch, the problem described in HDFS-760 is not relevant. On trunk we
use a different backward compatibility mechanism to map deprecated
configuration key to new configuration key, using DeprecatedKeyInfo. That patch
has its own mechanism to provide backward compatibility.
> Permission configuration files should use octal and symbolic
> ------------------------------------------------------------
>
> Key: HADOOP-6234
> URL: https://issues.apache.org/jira/browse/HADOOP-6234
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Allen Wittenauer
> Assignee: Jakob Homan
> Fix For: 0.21.0
>
> Attachments: COMMON-126.patch, COMMON-6234.patch,
> COMMON-6234.rel20.1.patch, COMMON-6234.rel20.patch, COMMON-6234.rel20.patch
>
>
> Currently, the settings for the default umask in Hadoop configuration files
> require the input format be in decimal. Considering that every admin in the
> world thinks of permissions in octal and/or symbolic format, the config files
> should really use those two formats and drop decimal.
> [... and, yes, I'm aware this breaks backwards compatibility. But in this
> case, I think that is perfectly acceptable.]
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