Jira to track changes required in YARN to allow rolling upgrades, including documentation and possible upgrade routes.
[Umbrella] RM Restart phase 2 - Work preserving restart
[Umbrella] Work-preserving nodemanager restart
Versioning and rolling upgrades for MR2
Run MapReduce framework via the distributed cache
Improved shuffle error handling across NM restarts
[Umbrella] Tests/documentation and/or tools for YARN rolling upgrades backwards/forward compatibility verification