In a sharded environment, insert more than 101 documents with the same value for the shard key into a collection. Issuing a find command which includes the parameter singleBatch:true to a mongos will not return any results to the client. Issuing the command with singleBatch:true removed will return 101 documents as expected. mongos> sh.shardCollection('test.foo',{x:1}) { "collectionsharded" : "test.foo", "ok" : 1 } mongos> for(i = 1; i < 250; i++){ db.foo.insert({x:0});} WriteResult({ "nInserted" : 1 }) mongos> mongos> db.foo.runCommand({find:"foo", filter:{x:0}, skip:101, singleBatch: true}).cursor.firstBatch.length 0 mongos> db.foo.runCommand({find:"foo", filter:{x:0}, skip:101}).cursor.firstBatch.length 101