the life cycle shuffle Dependency

hi, I'm learning spark, and wonder when to delete shuffle data, I find the ContextCleaner class which clean the shuffle data when shuffle dependency is GC-ed. Based on source code, the shuffle dependency is gc-ed only when active job finish, but i'm not sure, Could you explain the life cycle of

Guidance for filling out "Affects Version" on Jira

The Contributing guide only mentions what to fill in for “Affects Version” for bugs. How about for improvements? This question once caused some problems when I set “Affects Version” to the last released version, and that was interpreted as a request