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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1915) adding counters methods using String (as opposed to Enum)
Date Fri, 14 Mar 2008 17:58:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12578869#action_12578869
] 

Hadoop QA commented on HADOOP-1915:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12377780/hadoop-1915.patch
against trunk revision 619744.

    @author +1.  The patch does not contain any @author tags.

    tests included -1.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1961/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1961/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1961/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1961/console

This message is automatically generated.

> adding counters methods using String (as opposed to Enum)
> ---------------------------------------------------------
>
>                 Key: HADOOP-1915
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1915
>             Project: Hadoop Core
>          Issue Type: New Feature
>         Environment: all
>            Reporter: Alejandro Abdelnur
>            Assignee: Christopher Zimmerman
>            Priority: Minor
>             Fix For: 0.17.0
>
>         Attachments: hadoop-1915.patch
>
>
> Currently to use the counters from within Map/Reduce code Enums have to be used, the
Enum class defines the group and the Enum itself the counter. Internally they are converted
to Strings (the class name and the enum toString) and you can retrieve them as strings from
the client API.
> Using dynamic counters (driven by configuration of the map/reduce) is not easy with the
counters Enum based API. For example, currently I have an Enum class with 50 enums and we
have to map the cardinality to the counter name on the client. This is cumbersome.
> This could be easily improve by adding a String based counter method increment(String
group, String counter, long count) to allow use of the counters without Enums.
> Internally this method already exists, so the changes are minimal.

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