REST calls from pipeline

[Carles Capdevila Tejada]

Hi there,

I want to make rest calls from a Jenkinsfile pipeline as a means of cleaning up artifacts uploaded to Nexus. (pipeline - REST -> Nexus)
This SO answer by amuniz states that the recommended way to go is to use a shell step instead of a direct groovy call to avoid blocking the main thread. My question is:

Is it safe to make the 'blocking' groovy call at the end of the pipeline? I mean, would this blocking be problematic to other builds?

If it is problematic, would an asynchronous groovy call get around this problem?

Thank you for your attention.