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  1. Core Server
  2. SERVER-36049

Enable snapshot readConcern on mongos without atClusterTime

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      Description

      To enable running tests in the core transactions suite that use snapshot readConcern against unsharded collections on a single shard, mongos needs to allow snapshot readConcern for more commands than it currently does. These commands do not need atClusterTime, since snapshot readConcern will currently only be used against a single shard and will not need to establish a global timestamp.

      The commands are:

      • aggregate
      • distinct
      • find
      • findAndModify
      • insert
      • update
      • delete

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