automated tests sometimes fail without any obvious reason

[LynxAbraxas]

In regard to #84 (comment), see also #104:

GL-CI for ctp2 is configured such that each job is tried 3 times automatically

civctp2/.gitlab-ci.yml

Line 91 in f8f1c59

retry: 2

This is needed because sometimes sikuli events do not seem to get through to ctp2, so far the reason is unknown (RaiMan/SikuliX1#54). This problem seems to appear more often/likely if the GL-CI server (runner) are very busy. There is no option to pause between auto-repeated GL-CI jobs, so if GL-CI is very busy for some time, and all 3 tries of a job fall into that period, they are likely to fail. In that case it is best to re-run the pipeline again manually after some hours passed, not ideal but manageable. Increasing the number of auto-tries might not be desirable in this case, because they are likely just wasting the precious cost-free 2000 GL-CI minutes per month.