Did not get more than this single line on the log...
Running again against void containers started earlier
did not get the error. My guess is it is actually a timing problem that I have seen with docker db containers linked together. I might have launched the ups container too quickly after the db ones, the db containers are not yet properly started and no data base connections can be started.
If this timing hypothesis is the right one, a simple fix would be to add a waiting instructions in the entry point of the docker container.