[FLINK-21486] Add sanity check when switching from Rocks to Heap timers

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.11.3, 1.12.1
• Fix Version/s: 1.11.4, 1.12.2
• Component/s: Runtime / State Backends
• Labels: pull-request-available
• Assignee: Dawid Wysakowicz
• Reporter: Dawid Wysakowicz
• Created: 24/Feb/21 13:44
• Updated: 26/Feb/21 23:00
• Resolved: 26/Feb/21 08:19

Description

When restoring from a savepoint taken with RocksDB and rocks timers with RocksDB state backend and heap timers we will silently ignore all timers. It might lead to correctness issues. We should throw an exception in such a case.

Issue Links

• links to: GitHub Pull Request #15021
• links to: GitHub Pull Request #15022