We have a plan that relies on simple artifact sharing (that is, not maven shared artifacts) between stages of the plan - the first stage builds the artifact, and every subsequent job of each stage afterwards relies on that artifact being present. Every few builds, this process fails.

We need this to be more reliable - if the artifact is not ready, don't start building the rest of the job.

If possible, we could mark tasks as requiring the shared artifact, so they block until it's available, but we can do other tasks beforehand (such as checking out a working copy of a repo) to keep agent utilization high.