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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8608) Add Configuration API for parsing time durations
Date Wed, 10 Oct 2012 15:49:04 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473321#comment-13473321
] 

Hadoop QA commented on HADOOP-8608:
-----------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12548457/8608-2.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1597//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1597//console

This message is automatically generated.
                
> Add Configuration API for parsing time durations
> ------------------------------------------------
>
>                 Key: HADOOP-8608
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8608
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>    Affects Versions: 3.0.0
>            Reporter: Todd Lipcon
>            Priority: Minor
>         Attachments: 8608-0.patch, 8608-1.patch, 8608-2.patch
>
>
> Hadoop has a lot of configurations which specify durations or intervals of time. Unfortunately
these different configurations have little consistency in units - eg some are in milliseconds,
some in seconds, and some in minutes. This makes it difficult for users to configure, since
they have to always refer back to docs to remember the unit for each property.
> The proposed solution is to add an API like {{Configuration.getTimeDuration}} which allows
the user to specify the units with a postfix. For example, "10ms", "10s", "10m", "10h", or
even "10d". For backwards-compatibility, if the user does not specify a unit, the API can
specify the default unit, and warn the user that they should specify an explicit unit instead.

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