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From "Steve Loughran (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4014) Make yarn-common services robust
Date Thu, 15 Mar 2012 21:46:38 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230590#comment-13230590
] 

Steve Loughran commented on MAPREDUCE-4014:
-------------------------------------------

One of the tests in MAPREDUCE-4014 also demonstrates the current sharing of configurations
 -setting a property on the root service sets it in all the children. While this could be
a feature, it could leak configuration between children.
{code}
    conf.set("t2", "should not be shared");
    assertServiceConfigurationContains(svc, "t2");
    assertServiceConfigurationContains(firstChild, "t2");
    assertServiceConfigurationContains(lastChild, "t2");
{code}
                
> Make yarn-common services robust
> --------------------------------
>
>                 Key: MAPREDUCE-4014
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4014
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2
>    Affects Versions: 0.23.1, 0.24.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>              Labels: yarn
>             Fix For: 0.24.0, 0.23.3
>
>         Attachments: MAPREDUCE-4014.patch
>
>
> Review the yarn common services ({{CompositeService}}, {{AbstractLivelinessMonitor}}
and make their service startup _and especially shutdown_ more robust against out-of-lifecycle
invocation and partially complete initialization.
> Write tests for these where possible. 

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