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https://issues.apache.org/jira/browse/GIRAPH-998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14378817#comment-14378817
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Sergey Edunov commented on GIRAPH-998:
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+1 lgtm
> Close writers in parallel
> -------------------------
>
> Key: GIRAPH-998
> URL: https://issues.apache.org/jira/browse/GIRAPH-998
> Project: Giraph
> Issue Type: Improvement
> Reporter: Maja Kabiljo
> Assignee: Maja Kabiljo
> Priority: Minor
> Attachments: GIRAPH-998.patch
>
>
> When thread-safe per superstep output is used, in the end of application we
> close all the writers in a single thread. Closing a writer can take time, and
> we are not reporting progress while doing so, so it happens that tasks
> timeout during this stage. Doing it in multiple threads and calling progress
> while doing it will make it faster and prevent tasks from timing out.
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