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https://issues.apache.org/jira/browse/HDFS-12078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16073149#comment-16073149
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Weiwei Yang commented on HDFS-12078:
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Thanks a lot [~ajisakaa] :).
> Add time unit to the description of property
> dfs.namenode.stale.datanode.interval in hdfs-default.xml
> -----------------------------------------------------------------------------------------------------
>
> Key: HDFS-12078
> URL: https://issues.apache.org/jira/browse/HDFS-12078
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: documentation, hdfs
> Reporter: Weiwei Yang
> Assignee: Weiwei Yang
> Priority: Minor
> Fix For: 2.9.0, 3.0.0-beta1, 2.8.2
>
> Attachments: HDFS-12078.001.patch
>
>
> The description of property {{dfs.namenode.stale.datanode.interval}} in
> hdfs-default.xml doesn't mention about the time unit, we should add that to
> avoid confusing users.
> I have reviewed all properties in hdfs-default.xml, this is the only one
> property causes such confusion, user should be able to easily figure out the
> appropriate time unit for properties by either
> * Specified by property name, e.g
> dfs.namenode.full.block.report.lease.length.ms
> * Specified by property value with time unit suffix, e.g
> dfs.blockreport.initialDelay=0s
> * Explained by description of the property, e.g
> dfs.namenode.safemode.extension=3000, description: Determines extension of
> safe mode in milliseconds ...
> change to the property name and value will be an incompatible change, to
> minimize the impact, propose to simply add the time unit in the description
> (3rd approach). And this should be only one property needs the fix in
> hdfs-default.xml.
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