i typed mongod on in mac terminal , got following error:
2015-04-27t22:11:46.471-0400 w - [initandlisten] detected unclean shutdown - /data/db/mongod.lock not empty. 2015-04-27t22:11:46.479-0400 storage [initandlisten] ************** old lock file: /data/db/mongod.lock. means unclean shutdown, there no journal files recover. human error or filesystem corruption. please make sure journal directory mounted. found 4 dbs. see: http://dochub.mongodb.org/core/repair more information how make sure journal directory mounted? solve problem?
you have unclean shutdown. should start mongod --repair option.
mongod --repair note after repair need restart mongod
