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https://issues.apache.org/jira/browse/YARN-122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13620024#comment-13620024
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Steve Loughran commented on YARN-122:
-------------------------------------
This requires {{Configuration}} to implement {{clone()}} as a public method, so
that any subclass of it, such as {{YarnConfiguration}} will still be passed
down to the children
> CompositeService should clone the Configurations it passes to children
> ----------------------------------------------------------------------
>
> Key: YARN-122
> URL: https://issues.apache.org/jira/browse/YARN-122
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Steve Loughran
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> {{CompositeService.init(Configuration)}} saves the configuration passed in
> *and* passes the same instance down to all managed services. This means a
> change in the configuration of one child could propagate to all the others.
> Unless this is desired, the configuration should be cloned for each child.
> Fast and easy fix; tests can be added to those coming in MAPREDUCE-4014
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