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  1. Core Server
  2. SERVER-20727

Random.setRandomSeed() does not create a unique seed

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      for (i=0;i<3;i++) { print(new Date()); Random.setRandomSeed(); }
      

      Thu Oct 01 2015 17:03:00 GMT-0400 (EDT)
      setting random seed: 1443733380232
      Thu Oct 01 2015 17:03:00 GMT-0400 (EDT)
      setting random seed: 1443733380232
      Thu Oct 01 2015 17:03:00 GMT-0400 (EDT)
      setting random seed: 1443733380233

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      for (i=0;i<3;i++) { print(new Date()); Random.setRandomSeed(); } Thu Oct 01 2015 17:03:00 GMT-0400 (EDT) setting random seed: 1443733380232 Thu Oct 01 2015 17:03:00 GMT-0400 (EDT) setting random seed: 1443733380232 Thu Oct 01 2015 17:03:00 GMT-0400 (EDT) setting random seed: 1443733380233
    • Build B (10/30/15), Build C (11/20/15)

    Description

      The shell function Random.setRandomSeed() is not reliable to set a random seed, since it relies on new Date().getTime()), which is only a millisecond based value.

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            jonathan.reams@mongodb.com Jonathan Reams
            jonathan.abrahams Jonathan Abrahams
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