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  1. Core Server
  2. SERVER-33716

$comment is internally converted to a string

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      Previously, $comment was permitted to be any type. Per SERVER-27438, 3.4 changed that so that $comment is converted to a string internally. This breaks application that were depending on $comment being a document (in our case, we store things like caller information and tracing spans in $comment). We extract this information from the system.profile log and inprog.

      Separately, it seems like the comment field in the find and aggregate commands should similarly accept a document.

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