Introduction to 'mongod.service: Failed, Resulting in "Exit Code"'

When running the 'mongod' service on a Linux system, you may encounter an error message similar to 'mongod.service: Failed, Resulting in "Exit Code"'. This error message indicates that the 'mongod' service was unable to start or stopped unexpectedly, and as a result, an exit code was returned.

What is 'mongod' service?

'Mongod' is a process that runs as a service on a Linux system, which is responsible for managing the MongoDB database. 'Mongod' service is used to start, stop, and manage the MongoDB database server.

Causes of 'mongod.service: Failed, Resulting in "Exit Code"'

There are several reasons why the 'mongod' service may fail to start, resulting in the "exit code" error message. Some of the most common causes include:

• Incorrect configuration settings: Incorrect configuration settings in the 'mongod.conf' file can cause the 'mongod' service to fail to start.

• Insufficient permissions: The user account running the 'mongod' service may not have sufficient permissions to access the required files and folders.

• Port conflict: Another process may be using the same port as the 'mongod' service, causing it to fail to start.

• Low system resources: Insufficient system resources, such as low memory or disk space, can cause the 'mongod' service to fail.

How to Resolve 'mongod.service: Failed, Resulting in "Exit Code"'

To resolve the 'mongod.service: Failed, Resulting in "Exit Code"' error message, you can follow these steps:

1. Check the log files: Check the MongoDB log files located in '/var/log/mongodb/' for any error messages or warnings that could indicate the cause of the problem.

2. Verify configuration settings: Verify that the settings in the 'mongod.conf' file are correct and match your system configuration.

3. Restart the service: Restart the 'mongod' service using the command 'sudo systemctl restart mongod.service'.

4. Check system resources: Check that your system has sufficient resources, such as memory and disk space, to run the 'mongod' service.

5. Check for port conflicts: Use the 'netstat' command to check for any other process using the same port as the 'mongod' service.

Conclusion

In conclusion, the 'mongod.service: Failed, Resulting in "Exit Code"' error message can be caused by several factors, including incorrect configuration settings, insufficient permissions, port conflicts, or low system resources. By following the steps outlined above, you should be able to resolve the error and get your 'mongod' service up and running again.