Mongodump: Unrecognized field 'snapshot'
Add --forceTableScan
Example:
mongodump --forceTableScan -d database_name -o target_directory

http://aug2uag.blogspot.com/2018/08/mongoexport-unrecognized-field-snapshot.html

The Error comes from the mongo snapshot functionality which was introduced in mongo 4.0 (https://docs.mongodb.com/manual/reference/read-concern-snapshot/)
If you use an older mongo client (&lt;4.0) to dump/export a more recent MongoDB you will get the error

Unrecognized field 'snapshot'

Using &quot;forceTableScan&quot; will prevent the snapshot functionality to become active, this you won't get the error