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  1. Hadoop Common
  2. HADOOP-9150

Unnecessary DNS resolution attempts for logical URIs

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 2.0.2-alpha, 3.0.0-alpha1
    • Fix Version/s: 2.1.0-beta
    • Component/s: fs/s3, ha, performance, viewfs
    • Labels:
      None

      Description

      In the FileSystem code, we accidentally try to DNS-resolve the logical name before it is converted to an actual domain name. In some DNS setups, this can cause a big slowdown - eg in one misconfigured cluster we saw a 2-3x drop in terasort throughput, since every task wasted a lot of time waiting for slow "not found" responses from DNS.

        Attachments

        1. hadoop-9150.txt
          14 kB
          Todd Lipcon
        2. hadoop-9150.txt
          19 kB
          Todd Lipcon
        3. hadoop-9150.txt
          18 kB
          Todd Lipcon
        4. hadoop-9150.txt
          13 kB
          Todd Lipcon
        5. hadoop-9150.txt
          13 kB
          Todd Lipcon
        6. hadoop-9150.txt
          12 kB
          Todd Lipcon
        7. hadoop-9150.txt
          12 kB
          Todd Lipcon
        8. hadoop-9150.txt
          11 kB
          Todd Lipcon
        9. hadoop-9150.txt
          11 kB
          Todd Lipcon
        10. hadoop-9150.txt
          11 kB
          Todd Lipcon
        11. tracing-resolver.tgz
          2 kB
          Todd Lipcon
        12. log.txt
          8 kB
          Todd Lipcon

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              • Assignee:
                tlipcon Todd Lipcon
                Reporter:
                tlipcon Todd Lipcon
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                Dates

                • Created:
                  Updated:
                  Resolved: