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https://issues.apache.org/jira/browse/YARN-5324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390197#comment-15390197
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Carlo Curino commented on YARN-5324:
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[~yochen] thanks for reviewing this.
# The {{ProbabilisticRouterFederationPolicy}} was renamed to
{{WeightedRandomRouterFederationPolicy}}.
# The snippet you quote was still there, good catch. I added to all test cases
a corner check that forces us to be aware of weights missing info about an
active clusters, and fixed the NPE in {{WeightedRandomRouterFederationPolicy}}
and other classes.
Also:
# The latest patch also includes a {{LoadBasedRouterFederationPolicy}} that
parses the {{ClusterMetricsInfo}} from String capability and picks the cluster
with the most free space {{max(availableMemoryMB}} (and adds tests for that and
{{OrderedRouterFederationPolicy}}.
# We could probably polish the tests (I think there is a bunch of redundancy.
> Stateless router policies implementation
> ----------------------------------------
>
> Key: YARN-5324
> URL: https://issues.apache.org/jira/browse/YARN-5324
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager, resourcemanager
> Reporter: Carlo Curino
> Assignee: Carlo Curino
> Attachments: YARN-5324.01.patch, YARN-5324.02.patch,
> YARN-5324.03.patch, YARN-5324.04.patch
>
>
> These are policies at the Router that do not require maintaing state across
> choices (e.g., weighted random).
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