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  1. Hadoop Common
  2. HADOOP-9150

Unnecessary DNS resolution attempts for logical URIs

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Details

    • Bug
    • Status: Closed
    • Critical
    • Resolution: Fixed
    • 2.0.2-alpha, 3.0.0-alpha1
    • 2.1.0-beta
    • fs/s3, ha, performance, viewfs
    • 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. log.txt
          8 kB
          Todd Lipcon
        12. tracing-resolver.tgz
          2 kB
          Todd Lipcon

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              tlipcon Todd Lipcon
              tlipcon Todd Lipcon
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              Dates

                Created:
                Updated:
                Resolved: