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https://issues.apache.org/jira/browse/GIRAPH-934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085221#comment-14085221
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Igor Kabiljo commented on GIRAPH-934:
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https://reviews.facebook.net/D21021
> Allow having state in aggregators
> ---------------------------------
>
> Key: GIRAPH-934
> URL: https://issues.apache.org/jira/browse/GIRAPH-934
> Project: Giraph
> Issue Type: Improvement
> Components: graph
> Reporter: Igor Kabiljo
>
> Currently aggregators are specified via Class<Aggregator>, and so are created
> with empty constructor, which makes it extremely hard to have:
> ArrayAggregator(int n, Aggregator<A> elementAggregator)
> but each specific instance needs to be defined as a class.
> Goal is to allow that
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