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https://issues.apache.org/jira/browse/YARN-1503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848111#comment-13848111
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Siddharth Seth commented on YARN-1503:
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bq. A slightly more detailed explanation of the use-case so everyone can
understand? And why something like YARN-1040 is not enough.
YARN-1040 talks about launching multiple processes within the same container.
This requirement is for a single running process - we want to avoid
re-launching the process due to the cost involved with starting a new Java
process. The specific use case is running different tasks within the same JVM -
where one task may need some additional jars (Hive UDFs for example).
> Support making additional 'LocalResources' available to running containers
> --------------------------------------------------------------------------
>
> Key: YARN-1503
> URL: https://issues.apache.org/jira/browse/YARN-1503
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Siddharth Seth
> Assignee: Siddharth Seth
>
> We have a use case, where additional resources (jars, libraries etc) need to
> be made available to an already running container. Ideally, we'd like this to
> be done via YARN (instead of having potentially multiple containers per node
> download resources on their own).
> Proposal:
> NM to support an additional API where a list of resources can be specified.
> Something like "localiceResource(ContainerId, Map<String, LocalResource>)
> NM would also require an additional API to get state for these resources -
> "getLocalizationState(ContainerId)" - which returns the current state of all
> local resources for the specified container(s).
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