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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1931) Private API change in YARN-1824 in 2.4 broke compatibility with previous releases
Date Fri, 11 Apr 2014 23:18:16 GMT

    [ https://issues.apache.org/jira/browse/YARN-1931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13967224#comment-13967224

Sandy Ryza commented on YARN-1931:

bq. It'll be great to also put a class level javadoc comment that this is indeed private and
that folks should not use it directly.
addToEnvironment environment and setEnvFromInputString are both used by MapReduce.  As there
is no up-to-date developer documentation, the MapReduce code is currently the best place to
learn about how to build ContainerLaunchContexts, so I think it would be good to make sure
it showcases the best practices for other YARN applications.  Also, addToEnvironment is marked
Public.  Would it make sense to mark the class Public and mark all methods other than these
two as Private?

> Private API change in YARN-1824 in 2.4 broke compatibility with previous releases
> ---------------------------------------------------------------------------------
>                 Key: YARN-1931
>                 URL: https://issues.apache.org/jira/browse/YARN-1931
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: applications
>    Affects Versions: 2.4.0
>            Reporter: Thomas Graves
>            Assignee: Sandy Ryza
>            Priority: Blocker
>         Attachments: YARN-1931-1.patch, YARN-1931.patch
> YARN-1824 broke compatibility with previous 2.x releases by changes the API's in org.apache.hadoop.yarn.util.Apps.{setEnvFromInputString,addToEnvironment}
 The old api should be added back in.
> This affects any ApplicationMasters who were using this api.  It also breaks previously
built MapReduce libraries from working with the new Yarn release as MR uses this api. 

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