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https://issues.apache.org/jira/browse/YARN-1098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13751687#comment-13751687
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Karthik Kambatla commented on YARN-1098:
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Currently, RM is a {{CompositeService}} and its constituent services are
started via {{CompositeService#serviceStart()}}. To separate out the services
into two sets, and starting/stopping a single set, we should do one of the
following:
# RM should start these services directly, and not call super.serviceStart().
# RM itself should be an abstract service with CompositeService fields -
Stateless and Stateful services. These CompositeServices can then be started as
and when we want them.
> Separate out stateless services from stateful services in the RM
> ----------------------------------------------------------------
>
> Key: YARN-1098
> URL: https://issues.apache.org/jira/browse/YARN-1098
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 2.1.0-beta
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Labels: ha
>
> From discussion on YARN-1027, it makes sense to separate out services that
> are stateful and stateless. The stateless services be HA-agnostic, while the
> stateful services need to be aware of HA.
> Separating them out and adding cleanup methods should help the cause.
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