Mongodb service won t start

Question

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    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    I looked in  var log mongo mongod log and the following         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   How should I go about fixing this as restarting the server  and service does not seem to work   ERROR after repair  Not sure what to do it is saying something about error couldn t open file  var lib mongo local ns terminating        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

User · Answer

I verified permissions but all was good (mongod:mongod). As I'm working on a large project and from a similar issue in our dev environment where we had a script consuming all available disk space, I could see in the error messages that mongod needs at least 3.7Gb free disk space to run..

I checked my own disk space only to see that less than 2Gb was remaining. After moving / erasing some data I can successfully start mongod again.

Hope this helps ;-)

User · Answer

it probably might be due to the mongod lock file  but if the error persists even after deleting it check the paths in mongo conf  it might be a simple issue such as the configured log Path or dbPath is not there  check the paths in mongo conf mongod conf and check whether they exists  sometimes mongo cannot in its own create directory structures therefore you might have to create those directories manually before starting mongod

User · Answer

I solved this by deleting d  test mongodb data mongod lock file  When you will reconnect mongo db than this file will auto generate  in same folder  it works for me

User · Answer

In my case  it was also showing some lock problems whenever my local system shuts down without stopping the MongoDB server  But it just worked only by using sudo command -   sudo mongod --port 27017

User · Answer

Delete the  lock file from the C  mongodb data  path and then restart the mongodb service

User · Answer

When I ran mongod exe from Windows Terminal I got a message Unrecognized option  mp  There was an empty mp  in the end of mongod cfg  Removing that solved the problem for me

User · Answer

I can t upvote comment yet  but  1 for manually removing the lock file haha    My C9 workspace crashed on me and triggered an unexpected shutdown  The API advises  https   docs mongodb com manual tutorial recover-data-following-unexpected-shutdown      but removing data mongo lock worked for me       Also  just in case you re getting a connection refusal  which happened to me   running the repair command before removing the lock file could solve your problem  it did mine     sudo -u mongodb mongod --repair --dbpath  var lib mongodb

User · Answer

I solved this by executing C  mongodb bin mongod exe --repair first  Then when I ran MongoDB again by C  mongodb bin mongod exe  it successfully started

User · Answer

After running the repair I was able to start the mongod proccessor but as root  which meant that service mongod start would not work  To repair this issue  I needed to make sure that all the files inside the database folder were owned and grouped to mongod  I did this by the following    Check the file permissions inside your database folder    note you need to be in your dbpath folder mine was  var lib mongo I went to cd  var lib  I ran ls -l mongo  This showed me that databases were owned by root  which is wrong  I ran the following to fix this  chown -R mongod mongod mongo  This changed the owner and group of every file in the folder to mongod   If using the mongodb package  chown -R mongodb mongodb mongodb    I hope this helps someone else in the future

User · Answer

It s all in your error message - seems like unclean shutdown was detected  See http   docs mongodb org manual tutorial recover-data-following-unexpected-shutdown  for detailed information   In my expirience  usually it helps to run mongod exe with --repair option ro repair DB

User · Answer

For me  the reason for not starting turned out to be an orphaned lock file at  var lib mongo mongo lock   When I deleted that file  mongo would then start up OK   My system had had some messy crashes prior to this    Fedora 14

User · Answer

I tried deleting the lock file  but the real reason that this happened to me was because I was using   data db as the data directory  Mongo needs an absolute path to the database  Once I changed it to  home  data db  I was in business

[mongodb] Mongodb service won't start

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