[SERVER-5588] mapReduce and eval not recognized by mongos - MongoDB

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The piece of code runs fine on mongod, but running on mongos would raise the exception:

error

{ "$err" : "unrecognized command: mapReduce", "code" : 13390 }

changing the command to use small caps mapreduce runs fine on both mongod and mongos.

db.bar.insert({ x: 1 });

var map = function() { emit( this.x, 1 ); };

var reduce = function( key, values ) { return 1; };

var mrResult = db.runCommand({ mapReduce: 'bar', map: map, reduce: reduce, out: { inline: 1 }});

Similarly, the following works on mongod but not mongos:

db.runCommand({eval: function () { print("noop"); } });

is duplicated by

SERVER-11217 The mapReduce command should accept new name "mapReduce" on mongos

SERVER-11003 discrepancy on mapReduce and mapreduce command