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yarn-site.xml and aux-services
I notice the yarn-site.xml

    <description>shuffle service that needs to be set for Map Reduce to run </description>

Is this a general-purpose hook?
Can I tell yarn to run *my* per-node service?
Is there some other way (within the recommended Hadoop framework) to run a per-node service that exists during the lifetime of the NodeManager?

John Lilley
Chief Architect, RedPoint Global Inc.
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