[FLINK-17015] Fix NPE from NullAwareMapIterator

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.11.0
• Component/s: Table SQL / Planner
• Labels: pull-request-available
• Assignee: Unassigned
• Reporter: Jark Wu
• Created: 07/Apr/20 06:19
• Updated: 08/Oct/21 11:01
• Resolved: 02/Jun/20 08:33

Description

When using Heap statebackend, the underlying org.apache.flink.runtime.state.heap.HeapMapState#iterator may return a null iterator. It results in the NullAwareMapIterator holds a null iterator and throws NPE in the following NullAwareMapIterator#hasNext invocking.

Issue Links

• depends upon: FLINK-17610 Align the behavior of result of internal map state to return empty iterator
• is fixed by: FLINK-17610 Align the behavior of result of internal map state to return empty iterator
• links to: GitHub Pull Request #12033
• links to: NPE from NullAwareMapIterator in flink-table-runtime-blink