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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12078) Add time unit to the description of property dfs.namenode.stale.datanode.interval in hdfs-default.xml
Date Mon, 03 Jul 2017 04:02:00 GMT
Weiwei Yang created HDFS-12078:
----------------------------------

             Summary: 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: hdfs
            Reporter: Weiwei Yang
            Assignee: Weiwei Yang
            Priority: Trivial


The description of property {{dfs.namenode.stale.datanode.interva}} 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. And this should be only one property
needs the fix in hdfs-default.xml.



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