Jobs stuck on 'checking max-in-flight is not reached'


Hello! PCF Apps Manager team is running v4.2.1 deployed with BOSH to GCP, and have had three instances so far of jobs get stuck forever with the following output:

* checking pipeline is not paused
* checking job is not paused
* discovering any new versions of ci
* discovering any new versions of js-branch
* discovering any new versions of node-modules
* waiting for a suitable set of input versions
* checking max-in-flight is not reached

Once this happens, restarting the job seems to always produce the same result. The only solution the first time this happened was to destroy the pipeline and re-create it. Now it’s happened to two more pipelines, though, so it seems to be a recurring issue that we need to investigate further. Any suggestions on where to begin?