When running a map/reduce on a sharded collection with a finalize() function, cross-database creation does not work (or assert):

Finalize example (assuming new_db does not yet exist):

finalize = function (key, value) {

var new_db = db.getSisterDB("new_db");
stat = value;
stat._id = key;
new_db.table.save(stat);

return value;
};

In this instance the new_db database is created, but is completely inaccessible and produces inconsistent errors:

> db.getCollectionNames();
Mon Mar 21 15:15:04 uncaught exception: error:

{ "$err" : "no primary!", "code" : 10178 }

> db.repairDatabase();
Mon Mar 21 15:09:00 uncaught exception: error

{ "$err" : "wrong type for BSONElement () 0 != 8", "code" : 13111 }

> db.repairDatabase();
{
"assertion" : "no primary shard configured for db: new_db",
"assertionCode" : 8041,
"errmsg" : "db assertion failure",
"ok" : 0
}

The database also cannot be dropped:

> db.dropDatabase();
{
"assertion" : "assertion client/../s/shard.h:80",
"errmsg" : "db assertion failure",
"ok" : 0
}