azure devops run build pipelines sequentially

Question

Whenever multiple builds are running on the same pipeline only the first build completes and the rest error.

I would the builds to run sequentially instead of in parallel like they are now, so that if two developers check-in at about the same time, the second build will also complete.

When editing the pipeline in the execution plan under the Parallelism heading I have the radio button set to "none" and they still seem to try to run in parallel anyway.

Can anyone suggest how to solve this issue?

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Answer 1

It seems you have multiple build agents. Assuming you are using self-hosted build agents, you could specify certain demands of the agent to use only one agent. In this way, if the agent is not free, the build will keep waiting. To use a particular agent, add a demand of Agent.Name equals agentname, check the screenshot below. Agent name can be found in capabilities of the agent.