Getting Started with MongoDB on Windows: 4.NETSDK1071 and 2.1.x Package Versions.Override per-environment Web.Config values at deployment time using MSDeploy.NET Core Versions – ‘Current’ and ‘LTS’ Releases …and this has shifted the stray tab character to the end, and this is what is preventing the service from starting. Not seeing that tab character, I moved the cursor back to the start of the line and pasted in my two new lines of configuration… I press enter to move to the next line and…Īs you can Notepad++ has indented me to the same level as the line above by inserting a tab character on line 6. When I open the file, the cursor is on the end of the last line. I used Notepad++, but you may experience similar issues with other editors. Now, viewing the file in an editor like Notepad++ which allows me to display non-printable characters, you can see that there is indeed a stray tab character at the end of the file, and when it is removed the service start successfully. Here, you can see the problem: Error Parsing YAML config file: yaml-cpp: error at line 8, column 1: illegal tab when looking for indentation …then execute it (ignoring the –service parameter)… So, look at the command used to start the service… The Windows event log or Mongo.log files itself didn’t seem to give me any indicator what was going on. Today I made a change to a config file, adding a couple of extra lines to the end of the file, but when I came to restart the service, it would not start. Details on how to do this can be found in the post Running MongoDB as a Windows Service. This allows me to do things like version my config files/changes in source control, have base config files setup to allow me to get a new server up and running quickly and so on.

Working with MongoDB on Windows, I usually have my configuration in a text file and run mongod as a service.

TL DR Check your config file in an editor with non-printable characters displayed and ensure there are no stray characters such as tabs at the end of the file.

Start mongodb server windows