[FLINK-24475] Remove no longer used NestedMap* classes

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.14.0, 1.13.2, 1.15.0
• Fix Version/s: 1.15.0
• Component/s: Runtime / State Backends
• Labels: pull-request-available
• Assignee: Zakelly Lan
• Reporter: Piotr Nowojski
• Created: 07/Oct/21 13:40
• Updated: 08/Nov/21 15:07
• Resolved: 08/Nov/21 03:03

Description

After FLINK-21935 all of the NestedMapsStateTable classes are no longer used in the production code. They are still however being used in benchmarks in some tests. Benchmarks/tests should be migrated to CopyOnWrite versions while the NestedMaps classes should be removed.

Issue Links

• causes: FLINK-24826 Performance regression in HeapState benchmarks on Nov 8 2021
• is related to: FLINK-21935 Remove "state.backend.async" option.
• links to: GitHub Pull Request #17650