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  1. Core Server
  2. SERVER-44892

getShardDistribution should use $collStats agg stage instead of collStats command

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Details

    • Fully Compatible
    • ALL
    • v4.4, v4.2, v4.0
    • Sharding 2020-03-23

    Description

      See https://gist.github.com/alexbevi/dc51c0ce4820f46e46feca06dbdc64bb for repro details.

      As getShardDistribution relies on the results of the collStats command, if the underlying command fails getShardDistribution can incorrectly report that the "Collection is not sharded". This command should use the $collStats agg stage to prevent the problem described in SERVER-44891.

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          is caused by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-44891 collStats will fail if resulting BSON size > 16MB

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-44051 getShardDistribution() does not report "Collection XYZ is not sharded" on dropped but previously sharded collections

          • Major - P3 - Major loss of function.
          • Closed

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              tommaso.tocci@mongodb.com Tommaso Tocci
              alex.bevilacqua@mongodb.com Alex Bevilacqua
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              Dates

                Created:
                Updated:
                Resolved: