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  1. Giraph
  2. GIRAPH-477

Fetching locality info in InputSplitPathOrganizer causes jobs to hang

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.0.0
    • Component/s: None
    • Labels:
      None

      Description

      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.

        Attachments

        1. GIRAPH-477.patch
          13 kB
          Alessandro Presta
        2. GIRAPH-477.patch
          12 kB
          Alessandro Presta

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            People

            • Assignee:
              apresta Alessandro Presta
              Reporter:
              apresta Alessandro Presta
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              Dates

              • Created:
                Updated:
                Resolved: