Why city stops production

[mfans]

I play with 2.4.3 and at the very beginging, I have found one of my citys stoped production, it means it didn't want to produce anything. How to solve it?

[rainbowrobin]

We'd need more description, preferably screencaps, to know what you're talking about. At least, I have no idea.

[mfans]

First, it said that some barbarians were near the city, then 3 to 5 turns the city didn't produce anything. After that, it restarted to produce.

[cazfi]

Maybe barbarians displaced one worker from a tile with some shield production to a tile with none. Or maybe you finished new unit that took the last shield / turn production as maintenance cost. Then city could have grown to gain another worker, or workers moved back to their places for some other reason.