They currently use cursorCommandPassthrough(), which uses a ScopedDbConnection to establish the cursor and run the query.
- is duplicated by
- 
                    SERVER-4232 `show collections` on mongos doesn't include sharded collections which are not present on the primary shard -         
- Closed
 
-         
- 
                    SERVER-33434 collstats, dataSize, listIndexes, and filemd5 on mongos are unversioned -         
- Closed
 
-         
- is related to
- 
                    SERVER-30949 listCollections command through mongos should retry on NotMaster errors -         
- Closed
 
-