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https://issues.apache.org/jira/browse/BEAM-579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15438757#comment-15438757
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ASF GitHub Bot commented on BEAM-579:
-------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/incubator-beam/pull/867
> Integrate NamedAggregators into Spark's sink system
> ---------------------------------------------------
>
> Key: BEAM-579
> URL: https://issues.apache.org/jira/browse/BEAM-579
> Project: Beam
> Issue Type: Task
> Components: runner-spark
> Reporter: Stas Levin
> Assignee: Amit Sela
>
> At the moment {{NamedAggregators}} is an adapter between Beam's
> {{Aggregator}} and Spark's {{Accumulator}} and is implemented as a single
> Spark {{Accumulator}}, holding a map of metrics that can be augmented with
> new metrics dynamically, after the the pipeline has already started.
> Spark's out-of-the-box metrics mechanism does not support adding metrics to
> {{Source}} s that have already registered (it pulls their metrics upon
> registration and never updates them again).
> In light of the above, it would seem that there is a gap to bridge between
> the dynamic nature of {{NamedAggregators}} and Spark's current metric system
> so that metrics that are added dynamically are also reported to the defined
> Spark {{Sink}} s.
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