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https://issues.apache.org/jira/browse/GIRAPH-477?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alessandro Presta updated GIRAPH-477:
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Attachment: GIRAPH-477.patch
This patch adds a flag to optionally disable storing locality info and fetching
it from ZK.
> Fetching locality info in InputSplitPathOrganizer causes jobs to hang
> ---------------------------------------------------------------------
>
> Key: GIRAPH-477
> URL: https://issues.apache.org/jira/browse/GIRAPH-477
> Project: Giraph
> Issue Type: Bug
> Reporter: Alessandro Presta
> Assignee: Alessandro Presta
> Attachments: GIRAPH-477.patch
>
>
> In the presence of many input splits (>6000 in our case) and input split
> threads (3000), the loop that fetches locality info for all splits from
> ZooKeeper becomes a bottleneck. A few workers aren't able to even iterate
> once over the list, run into increased GC pauses, and eventually time out.
> Furthermore, depending on the cluster configuration, it's not always
> possible/useful to exploit locality.
> We should add a flag so that the feature can be optionally disabled.
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