[FLINK-24452] Move REST API state into dispatcher

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Runtime / REST
• Assignee: Unassigned
• Reporter: Chesnay Schepler
• Created: 05/Oct/21 08:20
• Updated: 05/Oct/21 08:20

Description

Various REST API handlers maintain state, which is problematic in HA mode as standby JobManagers are not aware of said state.

We should make sure state is only kept in the leading Dispatcher.

Sub-Tasks

• Forward jar uploads to leading JobManager: Open
• StaticFileServerHandler does not redirect: Open
• Move async savepoint operation cache into Dispatcher: Closed
• Move cluster deletion operation cache into ResourceManager: Open
• Move savepoint disposal operation cache into Dispatcher: Open