m30001| Wed May  9 04:55:45 [conn3] build index test.foo { _id: 1 }
 m30001| Wed May  9 04:55:45 [conn3] build index done.  scanned 0 total records. 0 secs
 m30001| Wed May  9 04:55:45 [conn3] insert test.foo keyUpdates:0 1193ms
 m30001| Wed May  9 04:55:45 [FileAllocator] allocating new datafile /data/db/shard_keycount1/test.1, filling with zeroes...
Wed May  9 04:55:45 uncaught exception: command { "shardcollection" : "test.foo", "key" : { "_id" : 1 } } failed: {
	"proposedKey" : {
		"_id" : 1
	},
	"curIndexes" : [ ],
	"ok" : 0,
	"errmsg" : "please create an index over the sharding key before sharding."
}
failed to load: /mnt/slaves/Linux_32bit_Nightly/mongo/jstests/sharding/shard_keycount.js