Mongodb not able to start in Ubuntu 15.04 - mongodb

Question

I have installed MongoDB 3.0.6 in Ubuntu 15.04 using the following commands.
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
echo "deb http://repo.mongodb.org/apt/debian wheezy/mongodb-org/3.0 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
sudo apt-get update
sudo apt-get install -y mongodb-org
In the end in the installation process I got this:
Job for mongod.service failed. See "systemctl status mongod.service" and "journalctl -xe" for details.
invoke-rc.d: initscript mongod, action "start" failed.
dpkg: error processing package mongodb-org-server (--configure):
subprocess installed post-installation script returned error exit status 1
Setting up mongodb-org-mongos (3.0.6) ...
Setting up mongodb-org-tools (3.0.6) ...
dpkg: dependency problems prevent configuration of mongodb-org:
mongodb-org depends on mongodb-org-server; however:
Package mongodb-org-server is not configured yet.
dpkg: error processing package mongodb-org (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
Processing triggers for systemd (219-7ubuntu6) ...
Processing triggers for ureadahead (0.100.0-19) ...
Errors were encountered while processing:
mongodb-org-server
mongodb-org
E: Sub-process /usr/bin/dpkg returned an error code (1)
After that when I start the server using the below command I get an error and the server is not started.
sudo service mongod start
And the error is
Job for mongod.service failed. See "systemctl status mongod.service" and "journalctl -xe" for details.
Now when I run:
sudo systemctl status mongod.service
I get the following:
mongod.service - LSB: An object/document-oriented database
Loaded: loaded (/etc/init.d/mongod)
Active: failed (Result: exit-code) since Thu 2015-10-08 13:46:08 IST; 22s ago
Docs: man:systemd-sysv-generator(8)
Process: 6604 ExecStart=/etc/init.d/mongod start (code=exited, status=1/FAILURE)
Oct 08 13:46:07 gariya-GA-A55M systemd[1]: Starting LSB: An object/document-oriented database...
Oct 08 13:46:07 gariya-GA-A55M mongod[6604]: * Starting database mongod
Oct 08 13:46:08 gariya-GA-A55M mongod[6604]: ...fail!
Oct 08 13:46:08 gariya-GA-A55M systemd[1]: mongod.service: control process exited, code=exited status=1
Oct 08 13:46:08 gariya-GA-A55M systemd[1]: Failed to start LSB: An object/document-oriented database.
Oct 08 13:46:08 gariya-GA-A55M systemd[1]: Unit mongod.service entered failed state.
Oct 08 13:46:08 gariya-GA-A55M systemd[1]: mongod.service failed.
Someone please help, I am new to Ubuntu and MongoDB and I am not getting what is the problem.

Answer 1

There is a log file: /var/log/mongodb/mongod.log
In the log I've found the following:
Failed to unlink socket file /tmp/mongodb-27017.sock errno: Operation not permitted
Most probably this was from previous MongoDB version. I deleted the file (rm -rf /tmp/mongodb-27017.sock) and finished the installation:
apt-get install mongodb-org
Now it works. :-)

Answer 2

Recently i ended up with same issue and i tried all the possible solutions explained up here. But it didn't worked out for me. I was getting the below error.
# sudo service mongod restart
Restarting mongod (via systemctl): Job for mongod.service failed because the control process exited with error code. See "systemctl status mongod.service" and "journalctl -xe" for details. [FAILED]
Eventually i figured out the solution which worked for me.
I went to /run/mongodb folder and deleted the file called mongod.pid. Then tried to restart the mongo using # sudo service mongod restart and it's worked!

Answer 3

My log said:
[initandlisten] Found an invalid index { v: 2, key: { version: 1 }, name: "incompatible_with_version_32", ns: "admin.system.version"
so:
$cd /var/lib
$sudo rm -rf ./mongodb
$sudo mkdir mongodb
$sudo chown -R mongodb.mongodb mongodb/
$sudo service mongod restart
and then all worked fine.

Answer 4

sudo nano /etc/systemd/system/mongodb.service
[Unit]
Description=High-performance, schema-free document-oriented database
After=network.target
[Service]
User=mongodb
ExecStart=/usr/bin/mongod --quiet --config /etc/mongod.conf
[Install]
WantedBy=multi-user.target
sudo systemctl start mongodb
sudo systemctl status mongodb
sudo systemctl enable mongodb
Is job!

Answer 5

The first thing you should check is a mongodb log file located at /var/log/mongodb/mongod.log
Look for the line with status E containing words like 'failed', 'fatal', etc.

Answer 6

Make sure that the /data/db directory exists
Make sure your user have write privileges in that directory:
$ sudo chown id -u /data/db
Execute mongod
If you still have problems and if the file /data/db/mongod.lock exists, remove it and execute mongod --repair.

Answer 7

I removed the mongodb lock file-
sudo /data/db/mongod.lock
Then restarted the mongodb
sudo service mongod restart
This solved the issue.

Answer 8

I was having the same issue, after searching I got the answer that, when I executed
sudo service mongod restart
I changed the permissions from user mongodb to root of the database folder, so the service was not able to read the data.
So to solve I just reverted the permissions back to the user mongodb
sudo chown -R mongodb:mongodb /path-to-db-folder
sudo service mongod restart