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https://issues.apache.org/jira/browse/SPARK-13051?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-13051.
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Resolution: Incomplete
> Do not maintain global singleton map for accumulators
> -----------------------------------------------------
>
> Key: SPARK-13051
> URL: https://issues.apache.org/jira/browse/SPARK-13051
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.0.0
> Reporter: Andrew Or
> Priority: Major
> Labels: bulk-closed
>
> Right now we register accumulators through `Accumulators.register`, and then
> read these accumulators in DAGScheduler through `Accumulators.get`. This
> design is very awkward and makes it hard to associate a list of accumulators
> with a particular SparkContext. Global singleton is not a good pattern in
> general.
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