MongoDB Error

If you happen to pass by this error

[02:33:05] mongodb$ mongo
MongoDB shell version: 1.6.3
connecting to: test
Sat Nov 13 02:33:10 Error: couldn't connect to server 127.0.0.1 (anon):1137
exception: connect failed

Check if your mongo is running by issuing "mongod" command. If you get something like this,

Sat Nov 13 02:30:41 MongoDB starting : pid=294 port=27017 dbpath=/data/db/ 64-bit
Sat Nov 13 02:30:41 db version v1.6.3, pdfile version 4.5
Sat Nov 13 02:30:41 git version: 278bd2ac2f2efbee556f32c13c1b6803224d1c01
Sat Nov 13 02:30:41 sys info: Darwin erh2.10gen.cc 9.6.0 Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/RELEASE_I386 i386 BOOST_LIB_VERSION=1_40
Sat Nov 13 02:30:41 exception in initAndListen std::exception: dbpath (/data/db/) does not exist, terminating
Sat Nov 13 02:30:41 dbexit:

Sat Nov 13 02:30:41 shutdown: going to close listening sockets...
Sat Nov 13 02:30:41 shutdown: going to flush oplog...
Sat Nov 13 02:30:41 shutdown: going to close sockets...
Sat Nov 13 02:30:41 shutdown: waiting for fs preallocator...
Sat Nov 13 02:30:41 shutdown: closing all files...
Sat Nov 13 02:30:41 closeAllFiles() finished

Sat Nov 13 02:30:41 dbexit: really exiting now

You can see a lot of things to do here but you should probably check on your log file to see some errors while your mongo wouldn't start. When I tailed my logs, I saw a different error stated like so

**************
old lock file: /usr/local/mongodb/data/mongod.lock. probably means unclean shutdown
recommend removing file and running --repair
see: http://dochub.mongodb.org/core/repair for more information
**************

And yes I did came from a crash. So I checked and removed the file and it automatically ran again based on my existing tail on the logs and it was back again.

Hope this helps somebody else as well.