问题
If I am creating a build definition, I can’t choose a Default agent queue. Not so long ago, I can create build definition which includes the default queue. I don’t know what the change was, that it doesn’t work anymore. If I go to edit a correct created build definition and then I try again to create a definition, I can choose the default queue. What is the reason for that?
Editing an existing build definition before creating isn’t the solution, because I have many projects and some have a correct build definition and some have no build Definition.
回答1:
If you are meaning the Default agent queue such as below during the creation of build definition
The queue that's attached to the pool that contains the agents you want to run this definition. You can first double check the status of your agent pool. Make sure everything is OK.
And even after you created the definition, you can still change the queue in General , try to change the queue here to identify if there's still empty queue.
来源：https://stackoverflow.com/questions/38825906/build-definition-only-empty-queue