title: Mongodb service won't start
body: <p>I am not sure why, and the service was working fine just yesterday, all of a sudden I can not get MongoDB to start up.</p>
  
  <pre><code>[root@purr ~]# service mongod start
  Starting mongod: Thu Aug 29 23:26:07.550 
  Thu Aug 29 23:26:07.550 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.
  Thu Aug 29 23:26:07.550 
  about to fork child process, waiting until server is ready for connections.
  forked process: 5078
  all output going to: /var/log/mongo/mongod.log
  ERROR: child process failed, exited with error number 100
                                                             [FAILED]
  </code></pre>
  
  <p>I looked in /var/log/mongo/mongod.log and the following:</p>
  
  <pre><code>***** SERVER RESTARTED *****
  
  
  Thu Aug 29 23:29:05.874 [initandlisten] MongoDB starting : pid=5118 port=27017 dbpath=/var/lib/mongo 32-bit host=purr.ipetfindr.com
  Thu Aug 29 23:29:05.874 [initandlisten]
  Thu Aug 29 23:29:05.874 [initandlisten] ** NOTE: This is a 32 bit MongoDB binary.
  Thu Aug 29 23:29:05.874 [initandlisten] **   32 bit builds are limited to less than 2GB of data (or less with --journal).
  Thu Aug 29 23:29:05.874 [initandlisten] **   Note that journaling defaults to off for 32 bit and is currently off.
  Thu Aug 29 23:29:05.874 [initandlisten] **   See http://dochub.mongodb.org/core/32bit
  Thu Aug 29 23:29:05.874 [initandlisten]
  Thu Aug 29 23:29:05.874 [initandlisten] ** WARNING: You are running in OpenVZ. This is known to be broken!!!
  Thu Aug 29 23:29:05.875 [initandlisten]
  Thu Aug 29 23:29:05.875 [initandlisten] db version v2.4.6
  Thu Aug 29 23:29:05.875 [initandlisten] git version: b9925db5eac369d77a3a5f5d98a145eaaacd9673
  Thu Aug 29 23:29:05.875 [initandlisten] build info: Linux bs-linux32.10gen.cc 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 12:39:36 EST 2008 i686 BOOST_LIB_VERSION=1_49
  Thu Aug 29 23:29:05.875 [initandlisten] allocator: system
  Thu Aug 29 23:29:05.875 [initandlisten] options: { config: "/etc/mongod.conf", dbpath: "/var/lib/mongo", fork: "true", logappend: "true", logpath: "/var/log/mongo/mongod.log", pidf$
  **************
  Unclean shutdown detected.
  Please visit http://dochub.mongodb.org/core/repair for recovery instructions.
  *************
  Thu Aug 29 23:29:05.875 [initandlisten] exception in initAndListen: 12596 old lock file, terminating
  Thu Aug 29 23:29:05.875 dbexit:
  Thu Aug 29 23:29:05.875 [initandlisten] shutdown: going to close listening sockets...
  Thu Aug 29 23:29:05.875 [initandlisten] shutdown: going to flush diaglog...
  Thu Aug 29 23:29:05.875 [initandlisten] shutdown: going to close sockets...
  Thu Aug 29 23:29:05.875 [initandlisten] shutdown: waiting for fs preallocator...
  Thu Aug 29 23:29:05.875 [initandlisten] shutdown: closing all files...
  Thu Aug 29 23:29:05.875 [initandlisten] closeAllFiles() finished
  Thu Aug 29 23:29:05.875 dbexit: really exiting now
  </code></pre>
  
  <p>How should I go about fixing this as restarting the server, and service does not seem to work.</p>
  
  <p>ERROR after repair</p>
  
  <p>Not sure what to do it is saying something about error couldn't open file /var/lib/mongo/<strong>local.ns</strong> terminating</p>
  
  <pre><code>***** SERVER RESTARTED *****
  
  
  Fri Aug 30 04:49:43.041 [initandlisten] MongoDB starting : pid=3300 port=27017 dbpath=/var/lib/mongo 32-bit host=purr.ipetfindr.com
  Fri Aug 30 04:49:43.041 [initandlisten]
  Fri Aug 30 04:49:43.041 [initandlisten] ** NOTE: This is a 32 bit MongoDB binary.
  Fri Aug 30 04:49:43.041 [initandlisten] **   32 bit builds are limited to less than 2GB of data (or less with --journal).
  Fri Aug 30 04:49:43.041 [initandlisten] **   Note that journaling defaults to off for 32 bit and is currently off.
  Fri Aug 30 04:49:43.041 [initandlisten] **   See http://dochub.mongodb.org/core/32bit
  Fri Aug 30 04:49:43.041 [initandlisten]
  Fri Aug 30 04:49:43.041 [initandlisten] ** WARNING: You are running in OpenVZ. This is known to be broken!!!
  Fri Aug 30 04:49:43.041 [initandlisten]
  Fri Aug 30 04:49:43.041 [initandlisten] db version v2.4.6
  Fri Aug 30 04:49:43.041 [initandlisten] git version: b9925db5eac369d77a3a5f5d98a145eaaacd9673
  Fri Aug 30 04:49:43.041 [initandlisten] build info: Linux bs-linux32.10gen.cc 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 12:39:36 EST 2008 i686 BOOST_LIB_VERSION=1_49
  Fri Aug 30 04:49:43.041 [initandlisten] allocator: system
  Fri Aug 30 04:49:43.041 [initandlisten] options: { config: "/etc/mongod.conf", dbpath: "/var/lib/mongo", fork: "true", logappend: "true", logpath: "/var/log/mongo/mongod.log", pidf$
  Fri Aug 30 04:49:43.058 [initandlisten] couldn't open /var/lib/mongo/local.ns errno:13 Permission denied
  Fri Aug 30 04:49:43.058 [initandlisten] error couldn't open file /var/lib/mongo/local.ns terminating
  Fri Aug 30 04:49:43.059 dbexit:
  Fri Aug 30 04:49:43.059 [initandlisten] shutdown: going to close listening sockets...
  Fri Aug 30 04:49:43.059 [initandlisten] shutdown: going to flush diaglog...
  Fri Aug 30 04:49:43.059 [initandlisten] shutdown: going to close sockets...
  Fri Aug 30 04:49:43.059 [initandlisten] shutdown: waiting for fs preallocator...
  Fri Aug 30 04:49:43.059 [initandlisten] shutdown: closing all files...
  Fri Aug 30 04:49:43.059 [initandlisten] closeAllFiles() finished
  Fri Aug 30 04:49:43.059 [initandlisten] shutdown: removing fs lock...
  Fri Aug 30 04:49:43.059 dbexit: really exiting now
  </code></pre>