another thing that could stop projects are the projects itself if they see no work can be done (e.g. verification only mode and no links to verify) or if no active proxies are there to work with.
@Sven, If I schedule my projects, to change each 20min for example. They will start again? I can't enter on my VPS each hour to start those projects, I need something to do this automatically.
Comments
A. Out of memory issues
B. Out of links (If scraping, maybe no new targets being found)
C. Connection issues