In 3.4, we plan to deprecate the group command. New applications are expected to prefer the aggregation framework or mapReduce. Use of the group command in 3.4 will result in a warning being logged with the dochub link http://dochub.mongodb.org/core/group-command-deprecation. The following documentation changes are required:

• The 3.4 release notes should note the deprecation.
• The 3.4 manual should note that the group command is deprecated since 3.4.0. The deprecation notice should be added to both the command docs (https://docs.mongodb.com/manual/reference/command/group/) and the shell helper docs (https://docs.mongodb.com/manual/reference/method/db.collection.group/).
• The dochub link should direct users to a page which indicates that aggregation or mapReduce can be used in place of the group command.