Opening a model solution fails if the course has not been loaded to the cache yet

[markkuriekkinen]

If a course is not yet loaded in the gitmanager cache, then when a user opens a model solution in the A+ front, loading the model solution to A+ fails. Does gitmanager crash or just time out when loading the course takes several seconds?

This occurred at least in the O1 course after the server upgrade (v1.15 June 2022).

[lainets]

This is due to the request timing out as the loading of a config takes around 9 seconds on O1. I believe NGINX is what times out the request but it may also be A+. The only 'real' solution would be to load the configs on start up. The time out could also be increased in NGINX/A+ but that only works as long as the config loading time doesn't increase (e.g. due to a larger course).

This is also quite a rare situation as it only happens if the cache is cleared (i.e. restarted) and the config hasn't been loaded yet (i,e, the course hasn't been accessed in any way).