I recently started to use GitHub Mylyn connector for Eclipse and I have it working, I create new tasks and I can see them in Eclipse and GitHub.
The problem is when me or someone else create an Issue on GitHub I can't see it on Eclipse. I have done this and configured Mylyn on that way as you can see in the image:
But as you can see under "Bugs and Enhancements" I have nothing and here I actually have one issues, so, why don't they appear? Is something to do with the fields Assigned to and Mentioning ? I have filled both with my GitHub username, then only one but with no results.
I was also having same problem. The problem here is that the Labels which are checked have And relationship rather than Or relationship, i.e if you check both bug and enhancement only the tasks that are labelled both bug and enhancements will show up there.
So, I think it will work if create separate query for enhancements and bugs.
来源：https://stackoverflow.com/questions/16328660/why-mylyn-is-not-getting-issues-from-github