mongo - couldn t connect to server 127 0 0 1 27017

Question

I am coming from riak and redis where I never had an issue with this services starting  or to interact   This is a pervasive problem with mongo and am rather clueless   Restarting does not help I am new to mongo    mongo MongoDB shell version  2 2 1 connecting to  test Fri Nov  9 16 44 06 Error  couldn t connect to server 127 0 0 1 27017 src mongo shell mongo js 91 exception  connect failed   This is what I see in the logs    now open  Fri Nov  9 16 44 34  conn47  end connection 10 29 16 208 5306  1 connection now open  Fri Nov  9 16 45 04  initandlisten  connection accepted from 10 29 16 208 5307  48  2 connections now open  Fri Nov  9 16 45 04  conn48  end connection 10 29 16 208 5307  1 connection now open  Fri Nov  9 16 45 04  initandlisten  connection accepted from 10 29 16 208 5308  49  2 connections now open  Fri Nov  9 16 45 04  conn49  end connection 10 29 16 208 5308  1 connection now open  Fri Nov  9 16 45 34  initandlisten  connection accepted from 10 29 16 208 5316  50  2 connections now open  Fri Nov  9 16 45 34  conn50  end connection 10 29 16 208 5316  1 connection now open  Fri Nov  9 16 45 34  initandlisten  connection accepted from 10 29 16 208 5317  51  2 connections now open  Fri Nov  9 16 45 34  conn51  end connection 10 29 16 208 5317  1 connection now open  Fri Nov  9 16 46 04  initandlisten  connection accepted from 10 29 16 208 5320  52  2 connections now open  Fri Nov  9 16 46 04  conn52  end connection 10 29 16 208 5320  1 connection now open  Fri Nov  9 16 46 04  initandlisten  connection accepted from 10 29 16 208 5321  53  2 connections now open  Fri Nov  9 16 46 04  conn53  end connection 10 29 16 208 5321  1 conn

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The cause by me was the space - run this in the console   df -h   or more specifically   du -hs  var lib mongodb     to check he disk usage  If it s   99  - just clean up some space and try again

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This is an old question  but  as a newbie I figured I d add that  using Webstorm  you need to click on Mongo Explorer  tab on far right hand side of your window   From there   -Click settings  -Click browse button  looks like a button with       on it   -Go to Program Files   MongoDB   Server   3 4   bin   mongo exe  your version maybe different than 3 4  -After that  click the green plus sign on the right  A window will open -Enter a name in  Label  slot  -Click apply   You should now be connected  Entering  mongod  in the terminal isn t enough  You have to do the above steps also   My apologies in advance to those of you who aren t using Webstorm  Not sure about the steps using other IDE s

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To connect with mongo we have to first start  mongod  services   following output you can see      mongod 2017-03-05T00 31 39 055 0530 I CONTROL   initandlisten  MongoDB starting   pid 1481 port 27017 dbpath  data db 64-bit host Prabhu-Nandans-Mac local 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten  db version v3 4 2 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten  git version  3f76e40c105fc223b3e5aac3e20dcd026b83b38b 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten  OpenSSL version  OpenSSL 1 0 2k  26 Jan 2017 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten  allocator  system 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten  modules  none 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten  build environment  2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten      distarch  x86 64 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten      target arch  x86 64 2017-03-05T00 31 39 056 0530 I CONTROL   initandlisten  options     2017-03-05T00 31 39 056 0530 W -         initandlisten  Detected unclean shutdown -  data db mongod lock is not empty  2017-03-05T00 31 39 057 0530 I -         initandlisten  Detected data files in  data db created by the  wiredTiger  storage engine  so setting the active storage engine to  wiredTiger   2017-03-05T00 31 39 057 0530 W STORAGE   initandlisten  Recovering data from the last clean checkpoint  2017-03-05T00 31 39 057 0530 I STORAGE   initandlisten  wiredtiger open config  create cache size 3584M session max 20000 eviction  threads max 4  config base false statistics  fast  log  enabled true archive true path journal compressor snappy  file manager  close idle time 100000  checkpoint  wait 60 log size 2GB  statistics log  wait 0   2017-03-05T00 31 39 620 0530 I CONTROL   initandlisten   2017-03-05T00 31 39 620 0530 I CONTROL   initandlisten     WARNING  Access control is not enabled for the database  2017-03-05T00 31 39 620 0530 I CONTROL   initandlisten              Read and write access to data and configuration is unrestricted  2017-03-05T00 31 39 620 0530 I CONTROL   initandlisten   2017-03-05T00 31 39 620 0530 I CONTROL   initandlisten   2017-03-05T00 31 39 620 0530 I CONTROL   initandlisten     WARNING  soft rlimits too low  Number of files is 256  should be at least 1000 2017-03-05T00 31 39 643 0530 I FTDC      initandlisten  Initializing full-time diagnostic data capture with directory   data db diagnostic data  2017-03-05T00 31 39 643 0530 I NETWORK   thread1  waiting for connections on port 27017 2017-03-05T00 31 40 008 0530 I FTDC      ftdc  Unclean full-time diagnostic data capture shutdown detected  found interim file  some metrics may have been lost  OK 2017-03-05T00 32 03 832 0530 I NETWORK   thread1  connection accepted from 127 0 0 1 49806  1  1 connection now open  2017-03-05T00 32 03 833 0530 I NETWORK   conn1  received client metadata from 127 0 0 1 49806 conn1    application    name   MongoDB Shell     driver    name   MongoDB Internal Client   version   3 4 2     os    type   Darwin   name   Mac OS X   architecture   x86 64   version   16 4 0      2017-03-05T00 32 08 376 0530 I -         conn1  end connection 127 0 0 1 49806  1 connection now open    After that open another terminal and just type  mongo    Following is output you can see      mongo MongoDB shell version v3 4 2 connecting to  mongodb   127 0 0 1 27017 MongoDB server version  3 4 2   Your issue solved

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in my case in windows and ubuntu  i needed to create  data db folder in root  In ubuntu  i needed one additional option  to give permissions for directory   windows  mkdir c  data db   ubuntu   sudo mkdir -p  data db sudo chmod 700  data db   then run   sudo service mongod start   check  sudo service mongod status   and then run  mongo

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Error  couldn t connect to server 127 0 0 1 27017  connection attempt failed  SocketException  Error connecting to 127 0 0 1 27017    caused by    No connection could be made because the target machine actively refused it   This error caused because Mongo Server been closed Simple Follow these steps  Open Task Manager Go to  gt Services Find MongoDB Right click and select Start

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I had the same error when connecting to Mongo on AWS EC2   This is what solved it https   serverfault com a 347159 62381 Remove the bind ip from the config file

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In my case   First I open config file  sudo vi  etc mongodb conf   Comment IP and Port like this   bind ip   127 0 0 1  port   27017   Then restart mongodb  sudo service mongodb restart sudo service mongod restart   Finally  it s work  D  finn Finn     mongo MongoDB shell version  2 4 9 connecting to  test  gt  exit

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Make sure that your mongo is running  I fixed this problem by trying to repair the mongodb  there I found that the directory required for the db to run was not created  It shows this error  Type  mongod  it will show the error  exception in initAndListen  29 Data directory  data db not found   terminating  Error happen because dbpath  data db   default config  does not exist  You need to create data folder and set permission for it   Then I create a folder on my system by the command  sudo mkdir -p  data db  and  sudo chown id -u  data db  then I run the mongo again and it worked

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MAC OS  Check status  brew services list   Something like   Name    Status  User Plist mongodb stopped     start it  brew services start mongodb   Try it again  mongo or mongo --port 27017

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This error is what you would see if the mongo shell was not able to talk to the mongod server   This could be because the address was wrong  host or IP  or that it was not running  One thing to note is the log trace provided does not cover the  Fri Nov 9 16 44 06  of your mongo timestamp    Can you    Provide the command line arguments  if any  used to start your mongod process Provide the log file activity from the mongod startup as well as logs during the mongo shell startup attempt  Confirm that your mongod process is being started on the same machine as the mongo shell

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Remove mongod lock file  And run  mongod -repair   uninstall reinstall mongod service fixed that problem for me   Thanks

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For Windows Instead of mongodb   localhost 27017 yourDatabase Write mongodb   yourComputerName 27017 yourDatabase Example  mongodb   Gabriel-Laptop 27017 shop  To find your computer laptop name write in the search bar View your PC name and the name near Device name is the name you are looking for   Note  I read somewhere that using localhost keyword in Windows OS for MongoDB is not recommended  most probably here

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Create the folder C data db if it doesn t already exist on your computer  Turns out MongoDB requires the existence of this folder structure  data db  to run  I hope this helps someone

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I also have the same problem then I got fixed by these two lines of code  Hope  it helps  systemctl start mongod systemctl enable mongod

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i had same problem  i have deleted E  Mongo Data Files db mongod lock file  so it started working  the problem is due to improper shutdown of server  so lock file is not clean

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If all the above solution does not work  go to service  start gt search gt services  and start mongodb service  Then  in a cmd prompt  after going to bin  type    gt mongo

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Normally this caused because you didn t start mongod process before you try starting mongo shell    Start mongod server  mongod   Open another terminal window  Start mongo shell  mongo

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First  you have to start mongod server then after in another terminal you have to start mongo shell   For starting  mongo server  1  If you path is Default path  data db            simple fired mongod in terminal  2  If your path is not data db then you command like as            follow            mongod --dbpath  here your path comes     For starting mongo shell      Simply fired mongo in another terminal  If you get this waiting for connections on port 27017  then your mongo successfully started   Hope you can get my point

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Start monogdb service using  sudo service mongod start    then from the new window or terminal start mongo client using   mongo

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I was getting this error on ubuntu but you can try with the following command   sudo service mongod start

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You can try with following command   sudo service mongod start

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Resolved   This problem could be solved by the below mentioned 4 steps   1   Remove  lock file  sudo rm  var lib mongodb mongod lock    2  repair the mongodb      mongod -   repair   3  start the mongod server  sudo service mongod start    4  start the mongo client   mongo   For more details take a look at http   shakthydoss com error-couldnt-connect-to-server-127-0-0-127017-srcmongoshellmongo-js-exception-connect-failed   http   shakthydoss com technical error-couldnt-connect-to-server-127-0-0-127017-srcmongoshellmongo-js-exception-connect-failed

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I face same issue after searching a lot I solve this by following    sudo service mongodb stop   sudo rm  var lib mongodb mongod lock   sudo mongod --repair --dbpath  var lib mongodb   sudo mongod --fork --logpath  var lib mongodb mongodb log --dbpath  var lib mongodb   sudo service mongodb start

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try this one  get into the bin folder on terminal  then write  sudo   mongod --dbpath  lt write here the path to your database gt   click enter   always do same thing   then sudo   mongo

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I had same problem to connect mongodb after install using brew on macOS   The problem was also mongod lock but before i had mongodb 3 6 installed and database directory was  usr local var mongodb and it have old files and mongod lock  Simple i moved my old database files to different folder and removed everything from  usr local var mongodb  Then restarted     brew services restart mongodb   And it s working fine now

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OK  this may be strange  My error happened because my log grew exponentially and clogged up server space hence mongo didn t get enough space to store anything   so I cleared the log    gt   var log mongod log

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Finally I got this is in a simple way    open terminal and go to the mongodb location  In my case it is  e  mongodb bin gt     and type the following command and press enter    mongod --config e  mongodb mongo config   Open another terminal and start the mongodb using  mongo exe   Thats it   you can use mongo

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if all the solution above doesn t work out perhaps then this might be one to help  Somewhere down the line you may have made connection to your local mongodb database via vagrant boxes    vagrant up and then ssh into your vagrant machine in which you ve made connection with mongodb  vagrant ssh vagrant box name  comment out the bind ip line from  etc mongod conf using    sudo nano  etc mongod conf   restart your mongodb daemon service  sudo service mongod restart  voila

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A little to late with the answer but I ve encountered the same issue   Following are the steps which helped me    Go to C   Create  data  folder In  data  create  db  folder open terminal  CMD  -  go to EX  c  MongoDB Server 3 4 bin  type in mongod    this will start mongo server  leave it opened    Run using a GUI  EX  robomongo    Or   open new terminal  CMD  -  go to EX  c  MongoDB Server 3 4 bin  type in  mongo  command

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First  go to c  mongodb bin gt  to turn on mongoDB  if you see in console that mongo is listening in port 27017  it is OK If not  close console and create folder c  data db and start mongod again

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After exhausting lots and lots of sulotions  I did- sudo brew services start mongodb-community rather than sudo service mongod start and it worked  So  first try sudo brew services start mongodb-community  and then to start the mongo shell  do- mongo

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if u install by brew  on osx  first run sudo mkdir  data db start mondoDB Daemon by typing mongod  leave it open  and then  run mongo by typing mongo in new terminal tab

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This method only works if you want to repair your data files without preserving the original files  To find where you dbpath resides- vim  etc mongodb conf  check for option dbpath    I have dbpath  var lib mongodb   Default   data db   Typical locations include   srv mongodb   var lib mongodb or  opt mongodb    Replace the  var lib mongodb with your dbpath  sudo rm  var lib mongodb mongod lock sudo mongod --dbpath  var lib mongodb  --repair sudo mongod --dbpath  var lib mongodb  --journal    Make sure that you leave you terminal running in which you have run above lines                   dont press  Ctrl c  or quit it                   Type the command to start mongo now in another window   Hope this works for you                   for those who want to repair your data files while preserving the original files                 mongo recover

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This was happening with me today and I resolved it in following way    Machine  I m using Windows 10 machine and downloaded the latest MongoDB - Community edition    So  the problem was  I did not have C  data db created    Without creating C  data db  I opened CMD terminal and started the database using mongod command at terminal      C  YourInstallationPath bin mongod    And when I fired mongo command then I was getting the problem   Twist  I created the necessary folders but still was getting the problem  And this is because mongo server was already running  To fix it  I fired up mongod command again  and it automatically referenced to C  data db   Other users have suggested to add C  data db but did not talk about executing mongod again  which exactly solved my problem

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Simply create a folder named  data  in C drive and inside data folder create another folder named  db   Then execute mongod exe

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Steps to solve this issue on Windows OS    Delete mongod lock file from C  Program Files MongoDB Server 4 0 data Click on mongod in C  Program Files MongoDB Server 4 0 bin Click on mongo in C  Program Files MongoDB Server 4 0 bin to start the mongodb shell

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Another solution that resolved this same error for me  though this one might only be if you are accessing mongo  locally  via a SSH connection via a virtual machine  at least that s my setup   and may be a linux specific environment variable issue   export LC ALL C   Also  I have had more success running mongo as a daemon service then with sudo service start  my understanding is this uses command line arguments rather then the config file so it likely is an issue with my config file   mongod --fork --logpath  var log mongodb log --auth --port 27017 --dbpath  var lib mongodb admin

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shakthydoss answer worked fine once  but after the second issue the  lock wasn t there  I just created a blank one  and it worked fine  So check if yours ain t there   If you are using the command line   cd  var lib mongodb  ls    ls  will list all the files in the folder  if the mongod lock isn t there  then   sudo touch mongod lock   Finally run command   mongod    -repair  sudo service mongod start    Mongo service should be working fine

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I am a windows user and I installed MongoDB in November 2018 and I didn t wanted to setup data db directories  But after few days  when I open  got an error message   MongoDB shell version v4 0 4 connecting to  mongodb   127 0 0 1 27017 2018-12-05T20 42 40 108 0530 E QUERY     js  Error  couldn t connect to server 127 0 0 1 27017  connection attempt failed  SocketException  Error connecting to 127 0 0 1 27017    caused by    No connection could be made because the target machine actively refused it    connect src mongo shell mongo js 257 13   connect  1 6 exception  connect failed   Then I tried to fix using all of above answers and didn t worked  When I tried to run mongod it said   MongoDB starting   pid 12220 port 27017 dbpath C  data db  64-bit host bla   I tried to change the db path to program files  through file system and also using cmd but those didnot worked   Solution that worked for me is   Opened the Task Manager  ctrl   shift   esc  -  Services tab and there was a MongoDB row with the status stopped  Then I right clicked and clicked start and everything working perfectly

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This work me -  In Mongo 3 2 for window  you should start Mongodb service  So  run the Command Prompt as Administrator then net start MongoDB

[mongodb] mongo - couldn't connect to server 127.0.0.1:27017

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