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  1. Hadoop Common
  2. HADOOP-6682

NetUtils:normalizeHostName does not process hostnames starting with [a-f] correctly

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Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.22.0
    • io
    • None
    • Reviewed

    Description

      public static String normalizeHostName(String name) {
      if (Character.digit(name.charAt(0), 16) != -1) {
      return name;

      This code is attempting to short-circuit the hostname->ip resolution on the assumption that if name starts with a digit, it's already an ip address. This is of questionable value, but because it checks for a hex digit, it will fail on names starting with [a-f]. Such names will not be converted to an ip address, but be returned unchanged.

      Attachments

        1. HADOOP-6682.patch
          0.6 kB
          Jakob Homan
        2. HADOOP-6682-Y20.patch
          0.6 kB
          Jakob Homan

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            jghoman Jakob Homan
            jghoman Jakob Homan
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